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1772-6.6.2, PLC-2/20, PLC-2/30 Programmable Controller

1. I O Group No EN Rack 1 Rack 2 Rack 3 Rack 4 zz F cm AC f il fl il i i i ici E 1 0 3 4 7 03 47 10 3 14 7 510 3 5347 l 1 1 1 A 3 i 1 i 1 l f li t U U i oo o LL LER ala a almimimimlms5 T ELI IT ET EJ EJT HT HIT HIT EU HIT EIT HIT ET HT HIT EI H tL ILI LL IL pu ILI LI jim BIS H E HIBIBIB tL ILI jimi t tL Li IL jum ILT 0O jum Ll jim LLII LL tL LL tL LL OI jim jim jim juu I IL IL l IL fo IL IL tL IL IL LL IL IL tL H RI BUIE EU BIB BI EB EB BI EEI IL tL juu IL fa IL IL ILI IL tL IL IL ILI IL nmm tL jim LLII jim jim jim tL jim tL jim juu LL juu LL ty jim ILI LL juu jum 9 HH H H BB BH jimi iim TEX EE I Him EIEI EIEII EI BI EI EI S BI EN S S E AUEI
2. gt s IN UH UO IET I Uy 97833 3 3 8 8 I O ADAPTER e e o o e o o o e e Cat Gu l i LEN S Y Q Q Y 0000 O S S S S 9 NY SV S S S S NY NY NY 4 S S S NY S 888 S S S S S S S S LT S NY S S NY S NY S S S S Q Q S S S Q S Q Q Z A C d Wer le a ll Ii Id 10208 I 3 43 Chapter 3 Assembly and Installation Figure 3 36 1771 16 Point Input Output Aaignment Form ALLEN BRADLEY WI 394 ROCKWELL INTERNATIONAL COMPANY Bulletin 1771 I O Chassis CONNECTION DIAGRAM ADDRESSING WORKSHEET 16 point Modules PAGE OF DATE PROJECT NAME DESIGNER
3. m 1 D cA i i i i i Ten n 1 1 1 1 j 1 i 1 l 1 iy 1 T T l qimIlmimImimimimiImhlamlmimimimim Im jim ILT IL IL ILI IL juu 0 I t Ir Lil Li tL IL tL Li IL Li ILI jim Lil Li IL IL IL jim Li IL D IL IL IL ILI IL IL IL T ii jim jim IL tL juan juu jum Lil um tL jim i Li ILI LI LII Li Li IL Li jum ILI IL Li pum tL tL IL Li IL Li Lil Li IL m jimi LII IL IL ILI ju jum jum 0 jim fo IL i juu jim tL fo i jim Lil IL IL IL ILI IL IL IL IL IL ILI ILI IL ILI ILI ILI LII jim tL jim jim LI ILI Li LII LI Li IL Lil jim Lil IL jim jim tL jim jim Li Ll Li Lil Li ii jim IL IL tL IL IL IL IL IL T ILI jan ILI Lil IL IL ILI jii LI Lil tL 0 En Ln IL tL tL IL ILI LL Li LII IL Li m tL IL LL Li iL Li L1 IL Lil IL Lil IL Li IL n IL LI IL ILI LL IL IL LL iL IL ILT IL ILI EET IL LII IL IL IL pau Li Lil IL Li IL Lil IL Li i juu IL IL IL Li Li Li IL Lil jum Lil IL LL IL IL I3 UI M L1 pud IL mul amit mul pal uL Iu CL F iii F i F F jii E T fi fii fi L w i LU LU LI i TIT TIT ie I O Group 1 I O Grou
4. na m h L h da h h h 10209 I 3 44 Chapter 3 Assembly and Installation Field Wiring Considerations When planning duct layout consider the following categories of wires and cables associated with an A B programmable controller I O power cables carry regulated 5V and 15V power to I O chassis I O interconnect cables local I O
5. Figure A 2 Illustration of 2 slot Addressing with Two 8 point Input Modules ti 2 slot I O Group s Ly U Input H Input Terminals m S Terminals 00 IB Qj 10 01 1S S 11 02 KI 12 03 A RM 13 04 JS Q 14 05 IB Qu 15 06 R 16 07 ce 17 S S HUA lia Output image table word corresponding to the I O group 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 unused Input image table word corresponding to the I O group 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 10230 1 Appendix A Addressing Using 8 Point I O Modules Figure A 3 Illustration of 20slot Addressing with 8 point Input and Output Modules I O Module Group i mu TT Input Output Terminals TS TS Terminals 00 aS 10 01 des 11 02 L 9 L Ry mm 12 03 JS 13 04 G 14 05 r gt 15 06 JIM 16 07 l RM S 17 S SG NE Output image table word corresponding to the
6. 10771 1 Common Equipment Chapter 2 Hardware There are three pieces of equipment common to the PLC 2 20 1772 LP2 LP2D4 and PLC 2 30 1772 LP3 LP3D4 controllers They are Processor Chassis Processor Interface Module Power Supply Processor Chassis Important Only series C AC supplies are discussed below See section titled Power Supply Compatibility for information on earlier series The Processor Chassis cat no 1772 LA is of rugged construction with louvers or holes cut into the sides top and bottom to allow convection cooling There are two types of module tracks located in the processor chassis The metal track on the left side of the chassis is only for the system power supply module The other three tracks in the chassis are constructed of plastic and are for the remaining processor modules Processor Interface Module The Processor Interface Module cat no 1772 LH occupies the left most plastic slot third slot from the right in the processor chassis Figure 2 3 This module contains the circuitry used for communication between the processor user inputs outputs and the industrial terminal On the front panel of this module are two sockets a 15 pin and a 50 pin two indicators and a four position mode
7. FRIMTITITIT L basse pm E e PEELE CH esso ER ER sat pei m ER FR 10197 1 Each vertical group of components is connected together Figure 3 19 These groups are connected to a ground bus mounted on the back panel of the enclosure Figure 3 20 and Figure 3 21 Connect the ground bus to the grounding electrode svstem through a grounding electrode conductor Chapter 3 Assembly and Installation Figure 3 20 Ground Bus Connection Details Ground bus e iles Tapped hole Star washer ru g Ground lug Bolt 10116 Figure 3 21 Ground Bus Connections Ground Bus Mounting Ground Bus Ground Lug Grounding Electrode Equipment Conductor to att Grounding Electrode Svstem ENCLOSURE GROUNDING The enclosure that contains the programmable controller components must be connected to earth ground Figure 3 22 Grounding paths to earth ground must be permanent and continuous They must be able to safely conduct electromagnetic noise currents and possible ground fault currents to earth ground with minimum impedance 3 25 Chapter 3 Assembly and In
8. HERES l ed HATTIE A sl sai TERR amm Pimp D An I O Module Group No 4 within the I O rack cal ii Word Address ht Seen M 1 024 NL 020 021 Word in the I O Image Table 05 12 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 024 025 026 027 030 ee IL el 10172 1 Chapter 2 Hardware The fourth and fifth digits designate the specific input or output terminal within the I O group to which you make a connection Figure 2 16 The terminal identification strips on the I O modules and wiring arms are blank when shipped You write in these terminal designations Figure 2 16 Determining the Location of an I O Terminal within an I O roup through a Location Address 00 10 01 Il 02 712 03 13 04 14 05 15 06 16 07 17 Terminal No 12 within the I O Module Group Bit No 12 within the Input or Output Image Table Word 17 16 15 14 13 12 11 10 07 06 05 04 0302 c 00 10173 1 2 25 Chapter 2 Hardware Field Wiring Arms You wire to and from your I O devices through a separate field wiring arm for each I O module The field wiring arm is a terminal
9. H Eu EI om e Eg H HHH HOH H e mj S UO B EH Bi H jl el mp Eq ge Bp ml m Bi mi e H s Wiring Duct 10198 1 3 28 Chapter 3 Assembly and Installation Figure 3 24 Maximum Rack Configuration PLC 2 20 or PLC 2 30 Processor I O Rack No 3 c 20 Oo a hs n 1771 I O Chassis any size I O Rack No 1 I O Rack No 4 I O Rack No 6 nud 1771 I O Chassis 1771 I O Chassis 1771 I O Chassis any size any size any size I O Rack No 2 I O
10. Power D B Suppl ee Battery Module BB x Housing a Processor y4 Fault f pill Memory IT E jin Fault H d Standbv a c Low UI 3 ri s o Q Memory Module fet Processor P ppy Interface CUBO M Module 10161 1 Sa Slot 2 3 Chapter 2 Hardware 2 4 Memory Modules The Memory Module cat no 1772 ME 1772 MEB 1772 MES or 1772 ME16 occupies the right most plastic slot in the processor chassis Figure 2 2 Table 2 A specifies the memory module for each processor Table 2 A PLC 2 20 and PLC 2 30 Memory Modules Maximum Processor Memory Module mm Max Data Size Tvpe 2 20 Table Size 1772 ME 8k Words 1772 LP1 1772 LP3 1772 MEB 8192 Words 1772 LP2 1772 LP3D4 8064 words 1772 ME8 1772 LP2D4 1772 MEB n a 1772 LP3 16K Words 1772 ME16 n a 1772 LP3D4 8192 words 16256 Words Fixed CMOS RAM Memory Modules cat nos 1772 MES and 1772 ME16 These modules contain non removable AM storage The 1772 MES stores 8K words the 1772 ME16 stores 16K words You may use the 1772 ME8 with either a 1772 LP2 PLC 2 20 or a 1772 LP3 PLC 2 30 you may use the 1772 ME 16 only with the 1772 LP3 processor CMOS RAM Memory Modules cat nos 1772 ME and 1772 MEB These CMOS RAM memory modules sup
11. 10237 1 A 13 Appendix A Addressing A4 Assigning I O Rack Numbers When you select 1 2 slot addressing each slot corresponds to two I O groups You still assign one rack number to eight groups however with 1 2 slot addressing this requires only four slots Thus in a single 16 slot chassis you now can have four I O racks Figure A 10 Figure A 10 Assigning I O Rack Numbers with 1 2 Slot Addressing Assigned Rack Numbers I O Group No EN Rack 1 Rack 2 Rack 3 paa Er f B Tau Lr ae PAA mi Tem EH Tem UST ME MEH Hr 0 3 44 7 10 3 44 7 0 3 514 7 10 3 14 7 1 1 1 1 l 1 1 1 1 i U U ILT ILI ILI TLIT ILI II IL
12. LE HE LE et et E Eo i ELEC Ho ng eee eee Ei H 9 6 AID VIII RE UFU UU UFU UTD TT U E e B b b l i e Q d 4 4 gt PLC 2 80 Processor I O Chassis Ao elt gd B UO Of OT LID II Ej di E E oh mq m m mp Wu om A ut s HS H C I O Chassis I O Chassis SW 5
13. Many input modules have filtering circuitry to suppress contact bounce and to guard against recognition of transients as data A color coded label on each I O module identifies the general type of module and voltage range The Programmable Controller Products catalog PCGI 3 2 lists the wiring arm current requirement voltage and current range and catalog number for each I O module and the I O adapter module WARNING Remove system power before installing or removing your module in the I O chassis Failure to observe this warning could result in damage to module circuitry and or undesired operation with possible injury to personnel 2 21 Chapter 2 Hardware I O Module Addressing Each I O terminal in a controller system is assigned a unique location address for programming identification Figure 2 13 An I O terminal location address is made up of its I O rack number its I O group number within the I O rack and its I O terminal number within the I O module group An I O rack is an assigned 128 inputs and 128 outputs Important This section provides an overview of Allen Bradley s conventional 2 slot addressing See Appendix A for a detailed description of 1 slot and 1 2 slot addressing Figure 2 13 Correspondence of Hardware Location to Processor Memory I O Rack No 107 Defined By I O Rack Switch Settings I O Group 0 7 within the I O rack defined by 1 Input position in an I O chassis by I O adapter module
14. Sn bosons ho Terme e 1 Tee ETE CH a Tee E nn m J fel H m H E H e L e H eee S EEEEEEHETETI 3 sess lo gt ae b mum il a si I O Rack No 2 0 2 v S 10171 1 12 Chapter 2 Hardware The third digit designates the specific I O group within the I O rack Figure 2 15 Figure 2 15 Determining the Location of an I O Group Number within an I O Rack through a Location Address The I O module group numbering in a local I O chassis starts with 0 A and in a remote I O chassis starts with 0 2 4 or 6 as selected through 00 07 10 17 switch settings on the I O adapter module swe e 1 i 9 essssooe p raa l mmn esee wn w ewm AEn S eese Gel R samme PEIEE p emm en l mi
15. l 3 H 677 e B D 11 E EN Em f EN l a l B B Q 10 0 5 25 4cm 1 PA s DON 2 Ti e kal LI le i L T e TJ DY er enh f fil i S amp IU oo 7 16 lt 851 gt 32 54cm 21 62cm 17 71 eu 44 98cm 128 VO 27 71 Note For ease of assembly Power Supply and I O Chassis should be a unit before mounting 70 38cm 1 The battery pack is used with the Mini PLC 2 and Mini PLC2 15 Processors 10205 I 1777 P2 P4 AUXILIARY POWER SUPPLY When mounting the 1777 P2 P4 auxiliary power supplies you may elect to remove the power supply modules in order to reduce the weight of the power supply chassis making it easier to handle To remove the power supply module from the auxiliary power supply chassis perform the following steps 1 Loosen the four thumb screws on the front cover panel and remove the panel Figure 3 32 3 36 Chapter 3 Assembly and Installation Figure 3 32 Auxiliary Power Supply Cat No 17777 P2 P4 Mounting Dimensions Panel Screws 6 6 16 8 cm T x I Old A E NI 12 25 13 5 81 1 cm 34 3 cm OUO OUO aga 000 sk el 88 Y amp QO oe rc u OQ O i 8 8 7 4 22 4 cm r 18 8
16. Maintenance and Troubleshooting Install the replacement memory module into the right most plastic slot of the processor chassis Replace the right front panel Restore power to system power supply module Reload user program into processor memory Monitor the diagnostic indicators to assure proper operation Replacing Processor Control Module Perform the following steps to replace the processor control module Figure 5 9 1 Turn mode select switch to the PROG position and remove power to the system power supply module 2 Loosen the two thumb screws on the right front panel and remove the panel This allows access to the processor control module and memory module 3 Remove the processor control module located in the middle plastic slot second slot from the right 4 Install the replacement processor control module into the middle plastic slot of the processor chassis 5 Re attach the right front panel 6 Restore power to system power supply module 7 Monitor diagnostic indicators to assure proper operation Replacing Processor Interface Module Perform the following steps to replace the processor interface module Figure 5 9 1 Turn mode select switch to the PROG position and remove power from the system power supply module Chapter 5 Maintenance and Troubleshooting Disconnect the I O rack interconnect cable and the program panel interconnect cable if connected Loosen the two thumb s
17. System Installation Recommendations 3 17 Index l 3 Svstem Power Supplv 4 5 Svstem Start up 4 1 System Structure 2 13 T Terminal Strip 3 52 Termination Plug 2 18 5 8 Transformer Constant Voltage 3 21 Troubleshooting 5 1 Troubleshooting With an Industrial Terminal 5 12 U Using THe Industrial Terminal at Start up 4 4 N Rockwell Automation Allen Bradley a Rockwell Automation Business has been helping its customers improve pro ductivity and quality for more than 90 years We design manufacture and support a broad range Allen Bradley of automation products worldwide They include logic processors power and motion control devices operator interfaces sensors and a variety of software Rockwell is one of the worlds leading technology companies Worldwide representation MA Argentina e Australia e Austria e Bahrain e Belgium e Brazil e Bulgaria e Canada e Chile e China PRC e Colombia e Costa Rica e Croatia e Cyprus e Czech Republic e Denmark e Ecuador e Egypt e El Salvador e Finland e France e Germany e Greece e Guatemala e Honduras e Hong Kong e Hungary e Iceland e India e Indonesia e Ireland e Israel e Italy e Jamaica e Japan e Jordan e Korea e Kuwait e Lebanon e Malaysia e Mexico e Netherlands e New Zealand e Norway Pakistan e Peru e Philippines e Poland e Portugal e Puerto Rico e Qatar e Romania e Russia CIS e Saudi Arabia e Singapore e Slovakia e Slovenia e Sout
18. NU Allen Bradley PLC 2 20 PLC 2 30 Programmable Controller Assembly and Installation Manual Table of Contents Introduction PR 1 1 General x ceria d dames ba aca ge o ep ee ee az E 1 4 PO Definition 12 22ccedanitaterascdaseve beaks bell BIS 1 1 Fundamental Concepts seen 1 1 Preassembly and Installation 00 1 2 Precautionary Notes 0 ccc cece eee eens 1 2 Remote I O Installation llle 1 4 Hardware c cue uunc EAE eases ERE ERE RARE 2 1 EO CMM ET 2 1 PLC 2 20 Processor 2 2 Common Equipment 022 cece eee ee eee eee 2 9 I O System Structure 20 0 0 ccc cece eee ees 2 13 I O Chassis Structure 00 0 cece eee eee es 2 15 I O Module Addressing 0 00 c eee ee eee eee 2 22 Programming Terminal 0 0 0 ccc cence eens 2 21 Auxiliary Power Supplies naana anaana cece eee eee 2 29 Assembly and Installation 3 1 Cop 3 1 Processor Assembly 00 0 0 cece eee ene ee eaes 3 1 1771 I O Chassis Assembly 000 0 cece eee eaee 3 9 System Installation Recommendations 005 317 Constant Voltage Transformer 0000 3 21 Component Layout 52e sao uu neces e 3 26 Component Mounting ccc cece eee eens 3 29 Incoming AC Wiring Guidelines llus 3 38 Wiring and Cabling Installation 000000 3 42 Programmi
19. s program that is contained in memory Outputs will be energized and de energized in accordance with the user s program RUN PROG In this position all of the functions that apply in the RUN position also apply Additionally you can change the processor to REMOTE TEST mode or REMOTE PROGRAM LOAD mode with the industrial terminal The key can be removed when the mode select switch is in any of the above mentioned positions Chapter 2 Hardware System Power Supply Module The System Power Supply Module cat no 1772 P1 series C 120 220V AC 1772 P4 24V DC occupies the left most slot metal in the processor chassis Figure 2 2 This slot will not accept any of the other processor modules The system power supply converts input voltages into the proper DC voltages for the processor and I O chassis A single connector extends from the rear of this module Figure 2 8 and plugs into a socket located on the processor chassis backplane Figure 2 9 This connector provides the power link from the power supply to the other processor modules and is capable of supplying 4 amperes of output current to power logic circuitry in the I O modules If the processor contains CMOS RAM memory module you may use either an AC or DC system power supply which may power an I O chassis Figure 2 8 System Power Supply Module Side View cat no 1772 P1 Series C Q Al
20. 0 to 7 A 1 Appendix A Addressing fourth and fifth numbers denote a terminal In 2 slot addressing 00 through 07 for the left slot of the I O group 10 through 17 for the right slot of the I O group In 1 slot addressing 00 through 17 for each I O group slot module In 1 2 slot addressing 00 through 17 for the upper half of each I O one group and 00 through 17 for the lower half of each module another group Figure A 1 Hardware Data Table Addressing Relationships Hardware Terminology Hardware Terminology Input 1 or Output 0 L Output 0 Rack No 1 7 Rack No 1 1 0 Group No 0 7 I O Group No 0 Terminal No Terminal No 12 00 07 10 17 E 01 0 12 Instruction oe Address Word Bit Word Bit Address Address Address Address Data Table Terminology Data Table Terminology Program Rung 10229 1 A 2 Addressing Modes Appendix A Addressing When using 1771 ASB Remote I O Adapter with PLC 2 family processors both at the appropriate series and revision level you can address module groups in various addressing modes The term addressing mode refers to the method of hardware addressing within individual I O chassis The selected mode s determines the type of module that can be used 8 point 16 point or 32 point The following sub sections discuss how these modes work and how you use them Table A A at the end of this sectio
21. Figure 3 33 Typical Power Distribution with Master Control Relay of a Grounded System Chapter 3 Assembly and Installation Disconnect O Multiply the power i requirements of the PLC power supplies by 2 5 to 3 and F F F add all other power requirements U U U to determine the required rating S S of the transformer E E E IL IL Ilg H Ha ae H H To Motor Isolation Slarters ME Step Down Sees TA Transformer Backplane Enclosure 220292500 Ground Bus Wall L J FUSE FUSE N e s X X 1 ja i i 1LT 2LT y M Pise RC y rounding Electrode j o Je Eouipment Conductor to NA co NA quipmen e i Grounding Earth Ground Use anv number of E Stop Conductors rounding switches in Series S MO a ME ole Mana Start System ala ala Bre CRM e T T Qal v NE Chey CRM e iM Connect When deos PS Applicable 1 2 e e User DC CRM CRM Supply L Output CRM T Device Lo ot 4 312 To DC I O r Devices Input Device To minimize EMI generation connecting a supression network is recommended for 120V AC Allen Bradley cat no 1691 N2 for 220 240V AC Electrocube part no RG 1676 13 To minimize EMI generation connecting a supressio
22. Pull down the field wiring arm if used on this module 5 Install replacement I O adapter module and secure the locking latch 6 Reconnect the I O interconnect cable s and I O termination plug if used on this module 7 Reconnect the field wiring arm if used on this module 8 Reconnect the power cable to the system power supply and all auxiliary power supplies 9 Monitor diagnostic indicators to assure proper operation Replacing I O Modules Perform the following steps to replace 1771 I O modules Figure 5 10 WARNING Contact with AC line potentials may cause injury to personnel Removing power from the system power supply does not remove power from the field wiring arm Failure to remove this external power source causes voltage to be present at the wiring arm terminals 1 Turn mode select switch to PROG position and remove all power to the I O chassis containing the I O module that needs replacing and external power provided for that module Chapter 5 Maintenance and Troubleshooting 5 18 Lift field wiring arm locking tab on I O module and rotate field wiring arm away from the module Unlatch the locking latch of the module to be removed Lift the locking latch and remove the I O module Install replacement I O module making sure it is the same type and series level as the one removed Lock the I O module in place using the I O locking latch Rotate the field wiring arm toward the module to attach and
23. i im lili CREE eem REE Css e d EHI jua E msssssal Seperate tH esssssscl n free ml l A ot oc DUUM l Ws 02098 Note When using this grounding configuration make no connections to EQUIP GND on the power supply terminal strips This can cause ground loops See section 4 1 Ee H essas tissa ema o o sieg 6 l t B I oo AT E ed EPEE CH besossess l l Ed
24. 0 Output switch settings Y XXX x Data Table Word Address xx sioner 1 2 Terminal No 00 07 10 17 within the I O Group 1 Byte 0 or 1 within the word which corresponds to the upperr or lower byte within the Data Table Word 2 Bit 0 7 within the byte which corresponds to the terminal no on the 17711 O module 10179 1 The first digit of an I O address designates either input 1 or output 0 2 22 Chapter 2 Hardware The second digit designates the number of the I O rack 1 through 7 in which the module is located This number is determined by your switch settings at that I O chassis Figure 2 14 Figure 2 14 Determining the Location of an I O Rack Through a Location Address I O Rack No 2 1 0 Rack No 2 Defined By yo Adapter ettings ng Switch Iii ili old psn aS A eomm 1
25. 0 5 AMP Power b Fuse Cable y 0 25 AMP Fuse y 9 10165 1 2 11 Chapter 2 Hardware Figure 2 9 Power Supply Backplane Socket S 5 U 7 ri ifa Power Supplv Cable a Socket N Z uU p 10167 1 The power supply monitors the input voltage for proper levels 98 to 132V AC for 120V AC operation 196 to 250V AC for 220 240V AC operation or 20 5 to 32V DC for 24V DC operation If the AC line voltage drops below the minimum rated voltage for more than one cycle or if the DC input line drops out of range for more than 15ms in the 24V DC input version the DC output voltages are shut down The power supply signals the processor when the AC voltage drops to 92V 184V for 220 240V operations or 20 5V DC for 24V DC operation to stop communication with the I O chassis before signal levels get too low to transmit valid data The DC output voltages are re established when the correct input voltage level returns On the front of the power supply module are the processor fuse two sockets for the I O chassis and a terminal strip On the left side of the power supply module are two fuses that protect the DC power circuitry against overload conditions Input Fuse The input circuitry of the power supply is fus
26. 110 Baud 300 Baud 600 Baud 1200 Baud 2400 Baud 4800 Baud 9600 Baud Environmental Conditions Operational Temperature 0 to 55 C 32 to 130 F Storage Temperature 40 to 65 C 40 to 149 F Relative Humidity 5 to 9596 without condensation Dimensions W x H x D a 14 5 x 10 x 23 inches 36 8 x 25 4 x 58 4 centimeters 6 5 Appendix Objectives Addressing Your Hardware Appendix Addressing After reading this Appendix you should be able to understand the various addressing modes that you can use with your processor system the system configurations needed for specific addressing modes Important The illustrations show a PLC 2 family processor in the first slot of the 1771 I O chassis In a PLC 2 20 or a PLC 2 30 system this is replaced with an adapter module You must properly address your hardware so that it relates to your ladder diagram program In the ladder diagram program the input or output instruction address is associated with a particular I O module terminal and is identified by a 5 digit address Figure A 1 Addressing serves two purposes it links a hardware terminal to a data table location input and it links a data table location to a terminal output In Figure A 1 reading from left to right the first number denotes the type of module 0 output 1 input second number denotes the I O rack 1 to 7 third number denotes an I O group
27. 16 point input and output moduled use two words one input i one output of the image table Output image table word corresponding to the I O group all bits used 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Input image table word corresponding to the I O group all bits used 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 10232 1 A 6 Appendix A Addressing Because these modules use a full word in the image table the only type of module you can use ina 2 slot I O group with a 16 point module is one that performs the opposite complementary function an input module complements an output module and vice versa You can use an 8 point module with a 16 point module in a 2 slot group however it too must perform the opposite function In this arrangement eight bits in the I O image table are unused Assigning I O Rack Numbers When you select 2 slot addressing each pair of slots one I O group is assigned to the corresponding pair of words in the input and output image tables You assign one I O rack number to eight I O groups Figure A 5 Figure A 5 I O Image Table and Corresponding Hardware for One Assigned Rack Number For 2 slot Addressing Word NOP W
28. 1771 ASB A A A Series B C A A X C A LEGEND A Any mix of modules in the respective points per module category Y Specific module placement with 16 pt input module in one slot of a slot pair and 8 pt output module in remaining slot C Conditional module placement you must use an input module and an output module in two adjacent slots beginning with slot 0 i e 0 and 1 2 and 3 etc X Will not work A 17 Symbols Empty 5 7 6 4 Numbers 1 slot Addressing A 2 1 2 slot Addressing _A 2 1771 I O Chassis Assembly 3 10 1771 AL 2 13 3 13 A 16 1771 ASB 2 14 5 10 A 2 Slot Addressing 2 22 2 slot Addressing A 2 24 Volt DC Power Supplies 6 3 SS A AC Power Supplies 6 2 Addressing 2 22 3 9 3 42 A 1 Modes A 3 Addressing Your Hardware A 1 Assembly and Installation 1 1 3 1 Auxiliary Power Supplies 3 34 6 2 Mounting 3 29 Auxiliary Power Supply 2 31 Auxiliary power supply 2 29 Auxilliary Power Supplies 2 30 Backup Time 3 6 Battery Alkaline 2 5 2 7 3 6 3 7 Backup 2 5 3 6 Backup Time 2 7 Lithium cell 2 6 3 8 C Cable I O Power cable 3 50 Chassis 2 1 5 12 6 3 1771 I O Chassis Assembly 3 10 Processor chassis 2 3 2 30 3 32 6 3 Checkout Before Applying Power 4 1 Index Checkut of Machine Motin 4 12 CMOS RAM Memory Module 2 4 2 5 Common Equipment 2 1 2 9 Component Layout 3 26 Component Mounting 3 29 Co
29. 45 External Power Strip Ol HEC u Jumper positions O La m indicated at side of G e d terminal strip 220 240V AC Q TO 120V AC pues sie OI EauiP GND S E O T I 10218 1 Xou must re position the two metal jumpers on the terminal strip for 220 240V AC operation Jumper positions for both 120V AC and 220 240V AC operation are shown at the terminal strip Figure 3 45 3 54 Chapter 3 Assembly and Installation Figure 3 46 Processor Industrial Terminal Connection Diagram PLC 2 20 on PLC 2 30 Processor a l gt e e C PLC kid 280 Channel A PLC 2 Family 97 RQ 9 f l O erat Int 1 Lii it e o o o b U EN E J c IN ZO Program Panel Interconnect Cable cat no 1772 TC 10219 1 In addition to repositioning the jumpers for 220 240V AC operation the main AC fuse of the auxiliarv power supplv must also be changed The power supplv is shipped with a 1 ampere slow blow fuse installed to accommodate 120V AC operation When the power supply is to operate on 220 240V AC the 1 ampere fuse must be removed and the 0 5 ampere fuse shipped separately with the power s
30. EIAI ET EIEI EITRI EEI Al BI BA IE I M I1 mil IL Lu fl pmi MI ML M M M n L jimi a A QED qe d EX web uf quf qm WwW LL LU LL LU LU LE I O Group 1 I O Group 1 1 0 Group 1 I O Group 1 Address Address Address Address 111 121 131 141 oe IL I O Grou Rack P 10239 1 Important When addressing a one slot block transfer module it must be addressed by the lowest group number that it occupies and at slot 0 For example a one slot block transfer module in rack 1 groups 2 and 3 chassis slot 2 would be addressed by Rack Group Slot at location 120 Important When addressing a two slot block transfer module it too must be addressed by the lowest group number that it occupies and at slot 0 For example a two slot block transfer module in rack 3 groups 4 5 6 and 7 it occupies chassis slots 3 and 4 would be addressed by Rack Group Slot at location 340 A 15 Appendix A Addressing System Configurations A 16 Also see the appropriate block transfer module user s manual Block Transfer modules must be located in the same slot pair i e slots 0 1 2 3 4 5 etc or they will not work Some two slot B T modules use the lower slave bus on the I O chassis backplane for intramodule communication PIC 2 20 and PLC 2 30 processors can communicate with local and remote I O The permissible addressing modes are dependent upon what each is addressing local or remote I O and how it is communicating with its I O modules If
31. LEJLU Field Wiring Arm Ground Shiled I O gwa Mounting Bolt Drain Wire S Belden No 8761 or Equivalent Wire Cable 107104 The shielded cable at the users device can be configured as shown in Figure 3 41 3 49 Chapter 3 Assembly and Installation Figure 3 41 Protection Shield at User s Device Insulated wires connect to user device Cut shield and bare drain wire short Bend back and tape to insulated shield from contact at this end of cable 107044 I O Chassis Power Connection The I O chassis can be powered by several sources see sections titled 1771 I O Chassis Assembly and Component Layout Once the power supply is selected the appropriate I O power cable must be used Figure 3 42 The cables have different pin connectors on each end to allow for proper connection After the power supply has been installed connect the power cable connector left loose as outlined in section titled Component Layout to the socket on the power supply providing power for that I O chassis Chapter 3 Assembly and Installation Figure 3 42 1771 I O Chassis Power Supply Connections 10215 I Input Power Connections WARNING To avoid injury to personnel and damage to equipment disconnect all AC and DC power to the controller before attempting any wiring installation within the enclosure 3 51 Chapter 3 Assembly and Installation The following paragraphs desc
32. LP2 programmable controller and must be ordered separately These modules are discussed in section titled PLC 2 30 Processor 2 1 Chapter 2 Hardware 2 2 PLC 2 20 Processor PLC 2 30 Programmable Controller There are two modules which are unique to the PLC 2 30 processor Figure 2 1 They are Processor Control Module cat no 1772 LG Memory Module A memory module is required for the processor to function It is not included as a part of the 1772 LP3 programmable controller and must be ordered separately These modules are discussed in section titled PLC 2 20 Processor2 1 The PLC 2 20 Processor cat no 1772 LP2 LP2D4 or the PLC 2 30 Processor cat No 1772 LP3 LP3D4 is the central processing unit of the system Figure 2 1 Input module signals are transmitted to the processor which operates on this data in accordance with your program Then it transmits this data to the output modules Figure 2 1 Processor Front Panel AC Version f e eo Legend L 1 Access memory and processor D modules by removing panel 2 User power connections 3 I O rack power socket A Program panel socket AC FUSE 6 9 2A 250 VAC SLOW SLOW O RACK POWER OUO Ovo 000 aon HET 220 JUMP m R 1 O rack socket Main input f
33. MEMORY 9 9 When the memory has been cleared the END statement is displayed 4 Enter the rung for testing the outputs Figure 4 3 This rung examines the pushbutton for an on condition When it is on it turns the output instruction on The output instruction is true when on CAUTION During the testing of outputs only one rung the rung used to test outputs should be entered into the processor s memory Do not program multiple rungs for start up as unpredictable system behavior may result 5 Turn the processor s mode select switch to TEST position Chapter 4 System Start Up Press the pushbutton and observe the test rung on the screen With the pushbutton closed both instructions displayed intensify This indicates that the input and output instructions are true on Turn the processor s mode select switch to RUN position Press the pushbutton and verify that the corresponding output module indicator for the address being tested is on If there is an output device connected verify that the output device is on Should the output device fail to energize check its corresponding output module indicator This indicator aids in troubleshooting The meaning of the indicator is as follows ON The module has turned its output on supplying voltage for the terminal address you re testing If the output device does not energize check the following Wiring to the output devices Wiring from the device to th
34. No 1771 A2 2AB Cat No 1771 A3B Cat No 1771 A4 MB Table 2 B 1 0 Chassis Sizes Cat No I O Slots Number of I O Per Module 1771 A1B 1771 A2B 1771 A3B 1771 MB 2 16 10168 1 Chapter 2 Hardware The backplane of the I O chassis has sockets for each module a socket for power supply connection and a switch group assembly Latches on top of the chassis snap down to hold the modules securely in place and provide labeling for easy module identification A package of I O Rack Keying Bands cat no 1777 RK is shipped with each I O chassis assembly These bands are used to ensure that only a user designated module is placed into a particular keyed slot Local I O Adapter Module Cat No 1771 AL For proper transmission of data between the processor and local I O modules 6 cable feet or less the I O chassis must contain an I O Adapter Module cat no 1771 AL The I O adapter module must be installed in each local I O chassis used with a processor Figure 2 11 Figure 2 11 1771 AL Local I O Adapter Module S ACTIVE PLC 2 VO ADAPTER JI l 10772 1 Chapter 2 Hardware 2 18 I O adapter module circuitry allows communication between input modules and the processor and the p
35. When the I O module is installed the field wiring arm pivots upward and snaps onto the front connector edge of the I O module Figure 3 14 No field wiring arm is needed for the adapter module a field wiring arm is used on the 1771 AL and 1771 ASB I O adapter modules Figure 3 11 Example 1771 Field Wiring Arms A 0 0 1 2 ooebabkabb E edqsesasagae Series A Series B 10174 1 Chapter 3 Assembly and Installation Figure 3 12 Snapping Field Wiring Arm onto Chassis Wiring Arm m 2d Horizontal Bar C Shaped Remove Bracket o M 10190 NV n stall Figure 3 13 Field Wiring Arms Installed Locking tab holds wiring arm when in F x position RENE 10777 1 3 16 System Installation Recommendations Chapter 3 Assembly and Installation Figure 3 14 Field Wiring Arm Wired ee 10176 1 600000 Field Wiring Arm 10778 l There are general recommendations for layout of a controller system These recommendations are the result of both product testing and Allen Bradley s cumulative experience with solid state industrial controls They provide useful guidelines for most controller installations These
36. a programmable controller system will have one of these structures Local 3 6 ft 9 1 8 m Remote 6 10 000 ft 1 8 3048 m Local Remote combination Local System Structure A local system has only nearby I O chassis 3 6 cable feet Up to 7 chassis may be assigned Chassis are connected to each other through 1777 CA 3 ft 92 m or 1777 CB 6 ft 1 8 m Of course each chassis must contain a 1771 AL Local I O adapter 2 13 Chapter 2 Hardware Remote System Structure A remote system allows the processor and the I O chassis to be separated by up to 10 000 cable feet approx 3048 meters Up to 7 remote I O racks may be assigned Proper transmission of data between either the PLC 2 20 or the PLC 2 30 processor and remote bulletin 1771 I O modules requires a 1772 SD2 Remote TVO Scanner Distribution Panel plus a 1771 ASB Remote Adapter in each I O chassis Connection between the processor and the 1772 SD2 is through a 1772 CS interconnect cable Connection from the 1772 SD2 to a 1771 ASB Remote I O Adapter and from one remote I O adapter to another is through 1770 CD twinaxial interconnect cable Local Remote System Structure The PLC 2 30 processor system can also be configured with a combination of local and remote I O chassis A local remote system has both nearby 3 6 cable ft and remote up to 10 000 cable ft I O chassis Up to 2 local and 7 remote racks may be assigned You must limi
37. arms and I O modules are installed Switch Group Assembly Located on the lower left side of the I O chassis backplane are switches in a switch group assembly that you must set for addressing purposes i e slot and rack and controller shutdown Figure 3 7 The depressed side of the switch indicates the position of the switch Settings for these switches for local racks only are shown in Table 3 B Table 3 B 1 0 Chassis Switch Group Settings For Local Rack Number Rack Switch 3 4 5 1 ON ON ON 2 ON ON OFF 3 ON OFF ON 4 ON OFF OFF 5 OFF ON ON 6 OF ON OFF 7 OFF OFF ON Limited to 2 I O racks if there is any remote I O Important See the user s manual for your remote I O adapter for the proper setting of these switches for rack number and addressing mode 2 slot 1 slot 1 2 slot 3 9 Chapter 3 Assembly and Installation 3 10 Figure 3 7 1771 I O Chassis Switch Group Assembly and Power Cable Socket zem C l J l ME Switch E Group Assembly Input soe Power L 99 Socket iE oO oO Of e C Hi CE ti 10183 1 Input Power Connection You connect the input power cable from your power supply either
38. between I O device status and controller logic By comparing this indicator to the actual I O device status specific aspects of controller behavior can be examined These include the following I O module function Processor scan of inputs and outputs The following paragraphs describe the significance of these status indicators and their relation to your hardware devices Once the significance of these status indicators is understood the hardware indicator comparison can be made Input Modules On the front of each input module one indicator corresponds to each input terminal When the module detects the connected input device is applying voltage to the terminal the corresponding indicator illuminates A comparison of this indicator with the actual status of an input device is useful to check the following User s power source for the device Wiring from the device u Connection to the correct wiring terminal on the I O chassis Input device itself Input module Output Modules On the front of each output module one indicator corresponds to each output terminal When the processor turns an output on its corresponding indicator illuminates A comparison of this indicator with the actual status of an output device is useful to check the following User s power source for the output device Wiring to the output device Connection to the correct wiring terminal on the I O chassis Output module fuse Chap
39. lock it in place on the I O module Restore all power to the I O chassis Monitor diagnostic indicators to assure proper operation General PLC 2 20 Processor PLC 2 30 Processor Specifications This chapter contains functional electrical environmental and physical information on the controller components The following are general operational specifications for this equipment Environmental Conditions Operational Temperature 0 to 60 C 32 F to 140 F Storage Temperature 409C to 85 C 409F to 185 F Relative Humidity 5 to 95 without condensation Nominal Input Voltages to Processor Modules 5 1V 12 0V 5 1V DC Supplied by processor power supply Input Power 25VA max Execution Time 5ms IK of memory nominal Memory Capacity 8K words maximum Nominal Input Voltages to Processor Modules 5 1V 12 0V 5 1V DC supplied by processor power supply Input Power 75V max Execution Time 5ms 1K of memory nominal Memory Capacity 16K words maximum 6 1 Chapter 6 Specifications 6 2 PLC 2 20 PLC 2 30 Memory Modules AC Power Supplies Memory Type CMOS RAM Power Supply Requirements 5 1V DC Relative Humidity 5 to 95 without condensation The Auxiliary Power Supply cat no 1777 P2 series B and C has the same internal circuitry as the System Power Supply cat no 1772 P1 series B and C The auxili
40. power source or common should be appropriately labeled Tape shrink tubing or other dependable means of labeling can be used In addition to labeling you can use wire insulation color to distinguish type of wiring signals DC I O signal wires may be blue in color and AC I O signal wires may be red Local electrical codes may also specify insulation colors for various types of signals Wiring for each I O module should be bundled together within the wiring ducts as outlined in section titled Field Wiring Guidelines It is strongly recommended that the system designer use the Connection Diagram Addressing Forms for 1771 I O chassis Figure 3 35 and Figure 3 36 The figures are full size make as many copies as you need A copy of these completed forms should be given to the installer to ensure proper installation of the system s wiring as designed After the wiring of the controller components has been completed these forms should remain in the enclosure to serve as a wiring guide should troubleshooting the system become necessary Chapter 3 Assembly and Installation Figure 3 35 1771 8 Point Input Output Assignment Form ALLEN BRADLEY YIN AROCKWELLINTERNATIONAL COMPANY Bulletin 1771 I O Chassis CONNECTION DIAGRAM ADDRESSING 8 point Modules PAGE OF DATE PROJECT NAME DESIGNER
41. rechargeable Replace the them at periodic intervals Alkaline cells may be used with any 1772 ME memory model A Lithium cell provides approximately 2 years of memory backup time at a maximum of 609C 1409F This cell is not rechargeable Replace it at periodic intervals A lithium cell may be used with a 172 ME revision K or later memory model When the STANDBY LOW indicator starts flashing replace the cell or cells as soon as possible as further minimum life of the cell s cannot be predicted To avoid loss of memory during cell changes be sure the processor is receiving power and the memory module is firmly seated in the processor chassis when you change the cell Chapter 3 Assembly and Installation CAUTION Memory contents are altered if you remove the cell when the power supply is powered down or off You must re enter the entire memory contents if stored data is lost ALKALINE CELLS To install two D size alkaline cells do the following 1 Loosen thumb screws on right front panel cover and remove cover Figure 3 3 2 Loosen battery housing screw and remove battery housing 3 Remove old alkaline cells 4 Install the cells as indicated on battery housing Figure 3 5 Figure 3 5 Battery Housing with Alkaline Cells j Orientation _ Alkaline Battery primm B V Alkaline Battery l Battery Contacts 10120a I 5 Re install battery housing and righ
42. recommendations are intended to aid in making the controller an integral part of your manufacturing facility Some of the installation recommendations for user supplied equipment are general in nature Environmental conditions the individual application and local codes and ordinances dictate the specific types of layout and wiring of user supplied installation equipment Special care should be taken in industrial environments that may contain one or more conditions adverse to solid state controls Your site may include equipment which produces excessive heat or electrical noise Line voltage variations may also occur in some locations Chapter 3 Assembly and Installation 3 18 Operating Temperature For most applications normal convection cooling keeps controller components within the 0 to 60 C operating range Thus the proper spacing of components within the enclosure is usually sufficient for heat dissipation There are however some applications where a substantial amount of heat is generated by equipment either inside or outside the enclosure In this case blower fans may be placed inside the enclosure to assist air circulation and to reduce hot spots near the controller Do not bring in outside air it may introduce harmful contaminants or dirt Electrical Noise Important The information we present here is a summary of the information presented in our Wiring and Grounding Guidelines publication no 1770 4 1 See this
43. users manual for the specific switches and their settings Appendix A Addressing Figure A 9 illustrates the 1 2 slot addressing concept with a 32 pt I O module A 32 pt I O module two 1 2 slot I O groups uses two input or two output words of the image table I O group applies to the upper 16 points I O group 1 applies to the lower 16 points You can use 8 pt and 16 pt I O modules with 1 2 slot addressing but the rest of the bits are unused They may be addressed through either of the I O module groups assigned to that chassis slot Figure A 9 Illustration of 1 2 slot addressing Using a 32 point I O Module 32 point Input Module dis Bit I 01 Is A Input Word 0 08 INS 04 17 1017 0 05 QI Image Table KS 06 Output Word 0 Words Allocated 1 2 slot 07 tO 1 2 slot for I O Group 0 1 0 Group IAI 10 1 0 Group 17 10 7 0 n N Q 12 Unused 3 CIS 14 15 O 16 17 RN amp l OI 0 l 01 S Gy o 03 S GI o 05 S o6 07 N S f Input Word 1 1 2 slot 7 CJ 10 1 2 slott 17 10 7 0 I O Group 11 Q 12 0 Group Image Table Words Allocated i S S 14 Output Word 1 for I O Group 1 a qa 16 17 10 7 0 a OI Unused SJ
44. you have a processor communicating with a local I O chassis thorough a 1771 AL Local I O Adapter module you can only use 2 slot addressing f your processor is communicating to a remote I O chassis through a 1771 ASB Series A Remote I O Adapter module and the needed 1772 SD2 Remote I O Scanner Distribution panel you can use 2 slot or 1 slot addressing See Pub No 1772 2 18 for addressing information f you are communicating with a remote chassis through a 1771 ASB Series B Remote I O Adapter module and the needed 1772 SD2 Remote I O Scanner Distribution panel you can use 2 slot 1 slot or 1 2 slot addressing See Pub No 1771 6 5 37 for detailed addressing information There are two factors that determine or limit what addressing mode you may use These are The 1771 Universal I O chassis series A or B The I O Adapter 1771 AL 1771 AS 1771 ASB Ser A 1771 ASB Ser B Appendix A Addressing The following table presents the possible combinations of addressing with Series B 1771 Universal I O chassies versus various I O adapters With Series A chassies only 8 point modules may be used No 16 or 32 point modules can be used in any configuration Table A A Series B 1771 Universal I O Chassis Addressing Modes Vs I O Adapters 1 0 Adapter I O Points Addressing Mode Cat No Per Module 1 slt 1 2 slt 1771 AL A X X X X X X X 1771 AS A X X C X X X X X 1771 ASB A A X Series A C A X X X X
45. 1771 A1B A2B or A4B Chassis a Use with 1771 A1B A2B A3B and A4B only Power Supplies and Power Cables Configuration Plug Located between the processor adapter slot and slot 0 is a Berg stick connector Stenciled on the backplane is the legend Using power supply module in this chassis Do the following Set the plug to the right N position if you use an external power supply Setthe configuration plug to the Y position if you use a slot power supply module This jumper directs the routing of the RESET signal 3 11 Chapter 3 Assembly and Installation 3 12 Keying Band Installation Keying Bands part of Cat No 1771 RK are shipped with each I O chassis Each backplane socket should be keyed to accept only the designated type of I O module assigned to that slot Keying guards against the wrong I O module being installed in the wrong I O chassis slot Each I O module and I O adapter module has two sockets on the backplane to plug into Install keying bands in the top socket The socket has guide numbers along the right side Figure 3 8 to aid in the positioning of the keying bands Keying band locations are specified in the publication for each I O module Figure 3 8 1771 I O Keying Baud Location Numbers dil 2 4 6 Keying s Bands 12 18 20 22 24 26 28 30 Backplane 32 Socket d sa c feci cr 10170 1 Keying band
46. 25 4cm E X 1 CSS le F ep e e T Y PEU CER 14 15 t7 156m 35 S4em 64 1 0 5 9445 gt 1281 0 21 62cm 61 34cm 10202 I 3 33 Chapter 3 Assembly and Installation Figure 3 29 1771 12 Slot I O Chassis Mounting Dimensions 347 l 197 8 70 8 6mm LOC 210mm 482 6mm 4 ed 214 4mm A K d 37 6mm 1 48 Ground Stud 177 8mm 7 354 6mm 13 96 o o 139 2mm Y S 5 48 o o o o o D Y 13408 Use the mounting methods outlined in section titled Component Mounting to mount the I O chassis Auxiliary Power Supplies The processor power supply can provide up to 4 amperes of output current to power I O modules When the total output current requirement of a bulletin 1771 T O rack exceeds the 4 amperes auxiliary power supplies are required Three of the seven auxiliary supplies are listed below AC Auxiliary Power Supply Cat No 1771 P2 1 AC Auxiliary Power Supply Cat No 1777 P2 u DC Auxiliary Power supply Cat No 1777 P4 See the Programmable Controller Products catalog pub no SD 1 7 for a listing of all power supplies and their performance specifications If the processor contains a core memory module you must use a separate auxiliary power supply for the I O chassis Chapter 3 Assembly and Installation 1771 P2 AUXILIA
47. 5 ft 1 55m 1771 CM 1771 A4B 1771 P3 P4 P5 No Chassis Cable needed Use 1771 CT for paralleling And power supplies 1771 P7 Chassis 1771 CP1 1771 A1 1771 A2 1772 P1 P4 3 ft 92m 1771 CK 1771 A4 1777 P2 P4 8 ft 2 45m 1771 CJ 1771 A3B 1771 P7 5 ft 1 55m 1771 CP2 1771 P1 1 ft 3m 1771 CL2 1771 PSC 1771 P3 P4 P5 No Cable needed Direct connection to 1771 A1B A2B or A4B Chassis Use with 1771 A1B A2B A3B and A4B only 3 Distance between the processor and the first I O chassis is limited by the cable feet requirement for the power supply being used 4 Distance between I O chassis is 3 or 6 cable feet 5 Minimum distance between a major component and the sides of the enclosure is 4 inches 6 Minimum vertical separation between major components is 6 inches 7 Minimum horizontal separation between major components is 4 inches 8 Minimum vertical distance between a major component and the top or bottom of the enclosure is 6 inches 9 Wiring ducts and terminal strips should be mounted no closer than 2 inches to any major component 3 27 Chapter 3 c Ss 2 amp E S 2 Ke c o ES Ee eb wn wn lt Figure 3 23 shows proper component spacing Figure 3 24 shows maximum I O chassis configurations Minimum Spacing Dimensions Figure 3 23 I O Chassis
48. 771 P7 AC 120 220 16A Power Supply Module pub no 1771 2 93 1772 P4 1777 P4 24V DC Input Power Supply pub no 1772 2 12 Chapter 1 Introduction Remote I O Installation The following related documents contain additional information about remote I O installation These documents are included in the Appendix Remote I O Adapter Module Assembly Product Data publication 1772 938 Remote I O Scanner Distributor Panel Product Data publication 1772 929 General Hardware This chapter describes the hardware associated with the PLC 2 20 and PLC 2 30 programmable controllers Each programmable controller is made up of the following components Processor 1 I O Chassis I O Modules Industrial Terminal Auxiliary Power Supplies You must specify each of these above components and their associated cables when ordering the programmable controller PLC 2 20 PLC 2 30 Common Equipment There are three components common to the PLC 2 20 and the PLC 2 30 processors They are Processor Chassis Processor Interface Module Power Supply These components are discussed in section titled PLC 2 20 Processor PLC 2 20 Programmable Controller There are two modules which are unique to the PLC 2 20 processor Figure 2 1 They are Processor Control Module cat no 1772 LT Memory Module A memory module is required for the processor to function It is not included as a part of the 1772
49. CE power cable This supply can also be mounted up to 5 cable feet from the I O chassis using a 1771 CD power cable The power supply is protected from overcurrent conditions at its inputs by a 2 ampere slow blow fuse This fuse is located on the front panel of the power supply The 1771 P1 Auxiliary power supply Figure 2 20 has the same functionality as the 1771 P2 plus it offers battery backup for the mini processors Figure 2 20 Auxiliary Power Supply Cat No 1771 P1 f 4 q q q q O Q Battery Pack Cat No 1771 BB q 10694 1 9 Amp Auxiliarv Power Supplies The 1777 P2 series C and 1772 P4 auxiliary power supplies perform the same functions and have the same features of the main controller power supply outlined in section titled System Power Module These auxiliary power supplies provide 9 amperes of output current to power one or two 1771 I O chassis one or two I O adapter modules and the I O modules in the I O chassis These auxiliary power supplies are self contained units and are not a module in the processor chassis Figure 2 21 A 1771 CJ or 1771 CK cable connects them to the I O chassis Chapter 2 Hardware Figure 2 21 Auxiliary Power Supply Cat No 1777 P2 10178 I S Olg A XI 888 B88 eere e 2 2 CO CD 2 9 _ E Q Gr UVP uS O C 107744 Powe
50. CTIVE Indicators 9 mur PLC 2 1 0 ADAPTER wu 10223 1 ACTIVE Illuminates when proper communication to and from the I O chassis is established RACK FAULT Illuminates if improper communication to or from the I O chassis is taking place If the RACK FAULT indicator illuminates on everv T O adapter module it indicates a connection fault has occurred a broken or loose cable connection in the I O interconnect cable or I O power cable If the cause of the failure is not readily apparent the Termination Plug cat no 1777 CP can be systematically moved from one I O chassis to another to isolate the problem The procedure for isolating I O faults in a local I O system is 1 2 Remove power from the svstem Remove the termination plug from the last I O chassis and install it in the lower connection in the next to last I O chassis Remove the I O interconnect cable to the last I O chassis in order to install the termination plug Reapply power Chapter 5 Maintenance and Troubleshooting If the RACK FAULT indicator is still illuminated the connection problem was not in the last I O chassis Repeat the above steps until you locate the I O chassis with the problem When the I O chassis with the poor connection is eliminated from the chain the RACK FAULT indicator turns off If only one RACK FAULT indicator illuminates it indicates that a fault exists in that I O adapter module and it
51. Controller Assembly and Installation Manual publication 1772 807 applies to both controllers When a topic applies to only one controller the term PLC 2 20 or PLC 2 30 is used When a topic applies to both controllers neither term is used A programmable controller PC is a solid stat logic control device for industrial applications As the term programmable implies its memory can be readily changed to meet changing application requirements The controller continuously monitors the status of devices connected as inputs Based on the user s program the controller controls the devices connected as outputs These input and output devices can be of different types with various voltage and current ranges They include the following Limit float selector or pressure switches Pushbutton switches a Thumbwheel switches Alarms indicators or annunicator panels u Solenoids Motors or motor starters u Transducers Various solid state devices including TTL and analog instrumentation Typical applications include material handling palletizing measuring and gauging petrochemical paper pulp and food processing to mention a few The controller stores all I O device status data in a central read write memory This allows the latest status data to be accessible during the scanning of the user s program PC programming instructions make it possible for the controller to perform operations such as timing counting arithmeti
52. I ILI ILI ILI ILI ILI ILI ILI ILI IL jim jum ta jam jim ii jim ii jim i jim I5 IL L imu LL Cy tL jam ILI pau jim jim i jim jim ILI jim lr IL tL LI IL juu IL LL tL tL tL jum IL IL IL tL jum t jim LLII 0O tL jum LL m jum jim i tL IL Cy tL IL jim ILI jimi jimi nmi T ILI tL LI t l t3 jum Lil ILT LL uu pum m jimi jimi jam jim LLII LL tL jim tL jim Lil IL ILI IL Li IL LI tL jum IL jum tL LI tL LI tL LI ILI LL IL LII IL tL LL jam jim jim LL tL jim tL IL Lil IL Li IL juu IL tL juu jam jim jim jim tL LI tL ILI Lil IL Li ILI IL jim ILI jum jum IL jum IL fo IL IL tL ILI IL 0 fa Li IL tL tL jam jim t LL tL I Lil IL juu IL LT IL T au IL tL LL tL tL tL LL LII jim IL ILI ta jm If IL ij IL LI tL LI Lil IL Li un i jii If jum tL t jum IL IL juu tL IL IL LI IL tL jim jamii 0 tL t Lil IL LI m jimi tL tL jam jim tL jim mu tL tL jim Lil IL Lu um IL M I1 TL IL omit M M mi tL TL MI mM M Li Li T AF T if T ii T i T Ex T fi fi fil U I I I I IT LU I E A I O Groups 0 1 t I O Groups 6 7 I O Groups 4 5 I O Groups 2 3 1771 A4B I O Chassis using 1 2 slot addressing 10238 1 Appendix A Addressing Figure A 11 illustrates addressing 4 modules each with the same I O group number but in the four different racks of a single I O chassis This method is explained in Figure A 1 Figure A 11 Group Address of a Module in Four Different Racks
53. I O devices Important If the output devices connected to the transformer are motors and or motor starters follow the manufacturer s transformer specifications Some manufacturers recommend a reserve capacity of 6 to 8 times the motor VA requirement in order to handle starting current surges Enclosure Considerations You should provide an enclosure to house the controller The enclosure is the primary means of protecting the controller from atmospheric contaminants oil moisture conductive dust or particles or any corrosive or otherwise harmful airborne substance Standards established by the National Electrical Manufacturer s Association NEMA define enclosure types based upon the degree of protection the enclosure provides the components mounted inside In general an enclosure which conforms to the NEMA standard for Type 12 enclosures is preferred for solid state control devices Mount the enclosure in a position which allows the doors to be opened fully and allows access to wiring and components for testing or troubleshooting Also important is the accessibility to an emergency disconnect device in the enclosure Chapter 3 Assembly and Installation The controller requires a minimum of 10 inches of working depth in the enclosure Working depth is the distance from the rear of the chassis when mounted in the enclosure to the inner most surface of the enclosure door when closed This would take into account print pockets mount
54. I O module group 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Output bits used Input image table word corresponding to the I O module group 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Input bits used 10231 I A 5 Appendix A Addressing Using 16 point I O Modules High density 16 point I O modules provide 16 input terminals or 16 output terminals 16 point I O modules use a full word in the input or output image table Two 16 pt modules one input and one output can be used in a 2 slot I O group Figure A 4 Figure A 4 Illustration of 2 slot Addressing with 16 Point Input and Output Modules e 2 Slot amp OGroup l U d Input S Output Terminals GJ Terminals g g 00 g 00 01 S 01 02 02 03 03 04 g 04 05 g 05 00 06 07 SI 07 10 _ S 10 11 S 11 12 N 12 19 N 13 14 W 14 5 g 15 16 NI 16 dd 5 1 0417 li jn Note
55. L o IL D IL IL ILI IL ILI juu fo jim jim juu fo ti jim fo fo LII m jimm LII tL IL ILI ILI ILI ILI ILI ILI IL IL TI LT IL H EIEI EE EIT EIEI EI BI FEHIM EI EI BI H mo IL jim jim jim ii jim IL ILI IL ILI LT ILI jim ILI H H ILI ILI LL IL ILI IL ILI ILI Lil IL ILI IL IL IL eig BII E i odllB BB BE BIBIBIBIBIBIBIBISIS ILI IL Li ju Li IL Li pau LII IL Li IL LI i EX EJ EH E BU BI BI E BI BL E E E E i Tp i Ff qm E EP L Ww LL LL LU LU cl J l 1771 A4B I O Chassis 1 slot addressing 10235 1 Earlier Figure A 1 we showed how the 5 digit input or output instruction is associated with a particular I O module terminal Now with two I O racks you use the instruction address to identify which rack you are communicating with A 10 Appendix A Addressing Figure A 8 illustrates addressing two modules each in the same I O group number but in different assigned racks of a single I O chassis Figure A 8 Example of 1 slot Addressing No ae Rack 1 I O Group Rack2 Lr 5 67
56. MO Output Image Table When you select 2 slot addressing each pair of slots is assigned an input image table word and an output image table word A A A Word NOOO WM Oo Input Image Table 10233 I A 7 Appendix A Addressing A 8 1 Slot Addressing The processor by way of the adapter addresses one I O module slot as one I O group Each 1 slot I O group is represented by a word in the input image table and a word in the output image table You have 16 input bits and 16 output bits available for each slot This lets you use any mix of 8 and 16 point I O modules in the I O chassis in any order Thirty two point modules must be used in complementary arrangements You select 1 slot addressing by setting two switches in the I O chassis backplane switch assembly See your scanner s or adapter s users manual for the specific switches and their settings The physical address of each I O group corresponds to an input and an output image table word The type of module you install either 8 pt or 16 pt I O determines the number of bits in these words that are used Figure A 6 on the next page illustrates the 1 slot I O group concept with one 16 point I O module This module gro
57. O system to shutdown When a major fault is detected outputs are either de energized or held in their last state as determined by the setting of the last state switch on the I O chassis backplane Processor Front Panel Indicators Two front panel indicators are located next to the mode select switch on the processor Figure 5 1 They are labeled DC ON and RUN These should always be the first check points when troubleshooting DC ON INDICATOR This front panel indicator Figure 5 1 illuminates when the appropriate power is applied to the system power supply module If the DC ON indicator fails to illuminate when power is applied check the following Has power been properly connected to the system power supply module Are Jumpers on the external power strip in their proper position according to the incoming voltage 5 2 Chapter 5 Maintenance and Troubleshooting Figure 5 1 PLC 2 20 AC Version Front Panel Indicators e z C e Legend d D 1 DC ON indicator H D 2 RUN indicator 2 PROG 3 Four position mode select switch TEST Do m TO RUN PROG AC FUSE 2A 250 VAC SLOW SLOW O RACK POWER OU OUO a Q aj ia Q Q DIAGNOSTICS 120V A D I 9 1D 9 99 S eu uu L l S e g JOMPER S 10221 l If power connections are correc
58. ORY 9 9 When the memory has been cleared the END statement is displayed 4 Enter the rung for testing the output using the force function Figure 4 4 The rung begins with a BRANCH END instruction This prevents the output from being energized with program logic A BRANCH END is never true therefore the only way to energize the output is to use the force function CAUTION During the testing of outputs only one rung the rung used to test outputs should be entered into the processor s memory Do not program multiple rungs for start up as unpredictable system behavior may result Figure 4 4 Rung for Testing Output Devices Using FORCE ON Instruction Using the force on instruction energized each output device Branch end instruction address to be tested 4 10 Chapter 4 System Start Up Turn the processor s mode select switch to TEST position Position the cursor on the output instruction and press FORCE ON INSERT on the industrial terminal keyboard This causes the output instruction to intensify and an ON message displayed under the output instruction A FORCED I O on the third line from the bottom of the screen alerts you that an instruction in memory has been forced Turn the processor s mode select switch to RUN PROG position Verify that the corresponding output module indicator for the address you re testing is on If there is an output device connected verify that the output device is on Sho
59. RY POWER SUPPLY There are two methods for mounting the 1771 P2 auxiliary power supply Mount it on either the left side of the I O chassis or as a stand alone unit The mounting dimensions for the stand alone unit are shown in Figure 3 30 Figure 3 30 Auxiliary Power Supply Cat No 1771 P2 Mounting Dimensions Stand Alone 2 0 5 0cm Hr J B DID C N SS A TA 11 25 10 0 ea 28 5cm 25 4cm Hi O I T l E m M 746 a 4 56 gt 18 2cm 11 6cm 10204 I 3 35 Chapter 3 Assembly and Installation You should mount the power supply on the left side of the I O chassis Use the mounting screws that are shipped with the power supply to secure it Figure 3 31 Figure 3 31 Auxiliary Power Supply Cat No 1771 P2 Mounting Dimensions I O Chassis Mounted 1 55 8 93cm ld ra TE Ll Li
60. Rack No 5 I O Rack No 7 Component Mounting 1771 I O Chassis any size 1771 I O Chassis any size 1771 I O Chassis any size 10692 The controller components must make solid electrical contact with the back panel for grounding purposes To ensure that good electrical contact has been established between controller components the enclosure back panel and the enclosure bare metal contact is required Paint or other nonconductive finishes must be scraped from the back panel and controller components if necessary where it comes in contact with the component mounting bolts nuts or welded studs An 8 gauge or larger copper or equivalent wire should be used to connect each component in the enclosure Connections should be made to the mounting bolts or studs on only one mounting bracket of the component s chassis Figure 3 25 shows mounting assembly details 3 29 Chapter 3 Assembly and Installation Bolt Mounting of a Ground Bus ora Chassis to the Back Panel Star Washer Ground Bus or Mounting Bracket Star Washer 3 30 Figure 3 25 Mounting Assembly Details Sc
61. al transmission as well as being separated from all other wiring Use a Belden 8761 cable or equivalent This cable has a single insulated twisted pair with a foil shield covering its entire length The twisted pair consists of a signal wire and its signal return The shield s function is to reduce the effect of induced noise at any point along the cable In order to do this the shield must cover the enclosed pair of wires as completely as possible Most importantly the shield must be properly grounded only at one end The recommended grounding point for the shield is at the I O chassis The I O chassis when properly mounted provides a solid connection to earth ground Exact wiring connections are given in the individual product data publications corresponding to the specific I O module In general however cable installation practices must follow these outlined here Connect each transmission cable shield to earth ground at the I O chassis mounting bracket However leave the shield unconnected at the external I O device end of the cable Never ground any cable shield at both ends 3 47 Chapter 3 Assembly and Installation Since each I O chassis must be connected to earth ground any connections to a properly mounted I O chassis is also a connection to earth ground To properly connect a shielded cable at a field wiring arm perform the following steps 1 Strip 3 feet of insulation from the cable at the end which is to c
62. all input devices connected to the controller Output devices should be connected on the same AC line but before the constant voltage transformer The constant voltage transformer must have a sufficient power rating for its load The transformer power rating for the system power supply should be at least 225VA Determine the proper size transformer as follows 1 Determine power supply power requirements from the nameplate or product specifications Power requirements for various system and auxiliary power supplies are listed in Table 3 D Table 3 D Power Supply Power Requirements Power Supply VA 1771 P2 75 1771 P3 38W 1771 P4 79W 1771 P7 300 1772 P1 85 1772 P4 75 1777 P2 85 1777 P4 75 3 21 Chapter 3 Assembly and Installation 3 22 2 Determine total power requirements of inputs drawing power from this transformer Add worst case power requirements of output devices which will also draw power from this transformer When output devices are connected the transformer size is substantially increased 3 Add input device power requirements and output device power requirements only those connected to the transformer secondary Multiply the power supply VA volt ampere rating by 3 Add this figure to the input output device requirement These calculations determine the proper transformer size allowing ample power to be delivered to the power supply throughout the entire AC cycle and provide the necessary power for
63. alog Module Monitors the magnitude of input signals and provides output signals which in turn are proportional to physical quantities such as temperature weight pressure position and velocity Motion Control Module integrates axis control of machine heads with process control Output signals can control various machine tools for multi axis control Communications Module provides communication between supervisory and local processors or between local processors and remote I O chassis This module interfaces industrial terminals and IBM AT compatible computers with processors 2 20 Chapter 2 Hardware I O modules are available for devices with different voltage levels and characteristics The Programmable Controller Products Catalog pub no SD 1 7 lists I O modules Product data available for each I O module provide description specifications connection diagrams and keying information Most I O modules have indicators that show the on off status of each input or output device connected to it These indicators are useful during start up monitoring and troubleshooting Some output modules also have an additional indicator that illuminates if an output fuse in the module has blown Many I O circuits have optical isolation that guards against high voltage transients that may occur in the user s application Such transients can damage the controller s logic circuitry Optical isolation is at least 1500V rms
64. and most I O devices Do not apply power to any device causing machine motion TESTING INPUTS Hardware indicator comparison should begin with the testing of input devices and modules Perform the following steps for each input device 1 Turn the processor s mode select switch to TEST position 4 5 Chapter 4 System Start Up 4 6 WARNING Never reach into a machine to actuate a switch since unexpected machine motion can occur and cause injury to personnel Instead use a wooden stick or other nonconductive device to activate the switch Do not use a metal rod since this could result in an electrical shock if it touches an exposed terminal 2 Manually turn the input device on and off Observe that the corresponding input module indicator turns on and off as the device is turned on and off If the corresponding input module indicator does not turn on check the following in the order presented User power source for the input device 1 Wiring from the input device to the I O chassis Connection to proper terminal on I O chassis Input device Input module 3 Turn the processor s mode select switch to PROG position 4 Program a dummy rung examining the status of the input device Figure 4 2 In this type of rung a storage bit is energized rather than an actual output Refer to the appropriate Programming and Operations Manual for additional information on using storage bits Figure 4 2 Rung for Testing In
65. and the enclosure back panel with the mounting nuts hand tightened If spaces are uneven insert flat washers as needed onto the mounting bolts or studs to even the spacing When this is accomplished wrench tighten the mounting nuts Processor When mounting the processor the installer may elect to remove the processor modules in order to reduce the weight of the processor chassis making it easier to handle The mounting dimensions for the processor chassis are shown in Figure 3 26 Use the mounting methods outlined in section titled Component Mounting to mount the processor 3 31 Chapter 3 Assembly and Installation Figure 3 26 Processor Chassis Mounting Dimensions 11 25 lt lt Bm gt T J x e i Qo l e l e FI je d Wy D D dS o 2 12 25 13 5 AC FUSE 81 1 cm g 34 3 cm d p pgs OUO m O90 aga Prob o 0 o Do D ae U I e rm Lem Y 8 8 i 12 0 P 22 4 cm 305cm 8 92 rt 27m 10200 1 I O Chassis When mounting the I O chassis the installer may elect to remove the I O modules in order to reduce the weight of the I O chassis making it easier to handle The mounting dimensions for the 4 8 12 and 16 slot I O chassis a
66. arate duct Serial communication cables may also be run with these lines I O power cables and parallel I O interconnect cables should remain external to all wiring ducts or in a duct not shared with other wiring within the enclosure 3 45 Chapter 3 Assembly and Installation I O Wiring Installation WARNING To avoid injury to personnel and damage to equipment disconnect all AC and DC power to the controller before attempting any wiring installation within the enclosure After the wiring has been run in the ducts pull the appropriate wires for each module and bundle each module s wires Attach each wire to its module terminal Figure 3 37 When the module is completely wired it should look similar to the field wiring arms shown in Figure 3 38 Figure 3 37 Terminal Wiring Completed on Field Wiring Arm 12S S8ggosSoeoeosoesseoSs esdgs ee 10867 1 Chapter 3 Assembly and Installation Figure 3 38 Module Wiring Completed Field Wiring Arm MN SO 10866 1 Low level DC I O modules refer to section titled Field Wiring Considerations require shielded cable for sign
67. ary power supply is contained within its own enclosure The system power supply is a module within the processor chassis Input Voltage 120V 220 240V AC Input Voltage Range 120V 98 132V AC 220 240V 196 250V AC Output Voltage a 4 5 1V 12V 5 0V DC Input Power 75VA Power Supply 5V Capability BA Series B OA Series C Fuses AC input 2A 250V AC slow blow 12V DC 0 5A 250V in 12V DC circuit a 5V DC 0 25A 250V Series B 0 5A 250V Series C Weight System power supply 17 lbs 7 7 kg Auxiliary power supply 27 5 lbs 12 5 kg 24 Volt DC Power Supplies I O Chassis Chapter 6 Specifications The Auxiliary Power Supply cat no 1777 P4 has the same internal circuitry as the System Power Supply cat no 1772 P4 The auxiliary power supply is contained within its own enclosure The system power supply is a module within the processor chassis Input Voltage 24V DC nominal Input Voltage Range a 20 5 32 0V DC Output Voltage 1 5 1V 12 0V DC Input Power 75VA Power Supply 5V Capability 1to9A Fuses 10A 125V slow blow a 0 5A in 12V DC circuit Weight System power supply module 9 5 Ibs 4 3 kg Auxiliary power supply module 20 Ibs 9 kg 5V DC Power Requirements Supplied by system power supply or auxiliary power supply Dimensions W x H x D Full specifications are given in publication no 1771 2 49 a 4 slot chassis
68. ason publication SGI 1 1 Application Considerations for Solid State Controls should be read as it gives general background information on solid state controls WARNING Read completely and understand thoroughly the contents of this manual before attempting assembly and installation of the controller or any of its components Failure to observe this warning could result in damage to the programmable controller and or undesired operation with possible injury to personnel In this manual you will see WARNINGS to tell you where you may be injured if you do not follow procedures properly CAUTIONS to tell you where equipment may be damaged if you do not follow procedures properly Important notes that stress information critical to your understanding or use of the products Chapter 1 Introduction Remote l O Installation The following related documents contain additional information about remote I O installation Local I O Adapter Module Product Data pub no 1771 2 95 Remote I O Adapter Module Assembly Product Data pub no 1772 2 48 Remote I O Scanner Distributor Panel Product Data pub no 1772 2 18 Power Supplies The following related documents contain additional information about power supplies that can be used with these processors 1772 P1 1771 P2 Series B and C Power Supplies pub no 1771 2 4 1771 P3 1771 P4 1771 P5 Power Supply Modules Product Data pub no 1771 2 111 1
69. bling the components as well as mounting them in an enclosure are contained in the first part of this chapter CAUTION You must read and understand this entire manual before attempting to install or operate the controller Failure to observe this caution may result in equipment damage The processor is shipped assembled except for the memory modules which are ordered separately If a 1772 ME or MEB module is to be used batteries and memory segments must be installed If a 1772 ME8 or ME16 module is used only batteries need be installed Memory Module Installation Either the 1772 ME 1772 MEB 1772 MES or 1772 ME16 memory module is inserted in the rightmost slot of the processor chassis figure 3 4 3 1 Chapter 3 Assembly and Installation Memory Segments Memory Segments Cat No 1772 MT MS MS8 512 2048 and 8192 words respectively are installed in the sockets labeled A B C and D on the memory module Figure 3 1 The first memory segment is installed in the socket labeled A Each subsequent memory segment must be installed in alphabetical succession B C and D without leaving an open socket between installed segments Table 3 A Figure 3 1 Memory Module Side View WA WB WC jJ Memor Segments m Keying Holes w w w Ww Battery Housing el S WAV w 10180 3 2 Chapter 3 Assembly an
70. blown fuse on the auxiliary power supply has no visual indicator The Auxiliary Power Supply cat no 1771 P2 does have a DC ON indicator which would indicate a blown fuse on the power supply Figure 5 8 A blown fuse causes a major fault thus causing the processor and I O system to shut down 5 11 Chapter 5 Maintenance and Troubleshooting Rules for Module Replacement 5 12 Figure 5 8 Auxiliary Power Supply cat no 1771 P2 a Battery Pack Cat No 1771 BB cem Je 10227 1 Troubleshooting With an Industrial Terminal Troubleshooting with the industrial terminal is basically the same as described in chapter 4 The industrial terminal indicates whether an input or output bit is turned on or off You can verify this on or off status with the program to see if it is operating the way it should when it should If it is not test inputs outputs and machine motion in order to isolate and repair the trouble Once a controller fault has been narrowed down to a particular module it is often useful to replace the suspect module or modules one at a time In all cases when removing modules from or inserting modules into the I O chassis or processor chassis power must be off This means removing the power from the system power supply during processor module replacement Also when replacing I O modules any user provided power sources for the I O modules must also be turned off Replace the
71. c operations x 7 comparison and data manipulation Chapter 1 Introduction Preassembly and Installation Precautionary Notes The controllers use readily understandable symbols in a simple format The ladder diagram program is manually entered into memory using a programming terminal A programming terminal is also used to edit the program and monitor the status of the user s I O devices Programming terminals can also be used to interface the processors with peripheral devices The devices include tape punches and readers keyboards and printers and the Digital Cassette Recorder cat no 1770 S A or Data Cartridge Recorder cat no 1770 SB allow a variety of additional capabilities as follows Storing the program on magnetic or punched paper tape Loading the program from tape to PC Generating a hard copy printout of the program Generating various types of reports in a user programmed format On the various controller components are indicators that show I O device processor and power supply status These indicators aid in providing quick diagnosis of a fault situation which aids in troubleshooting Carefully read this manual before any assembly or installation is attempted It is strongly recommended that the hardware and installation personnel work closely with processor programming personnel at start up NOTE Many aspects of the programmable controller may be new to many individuals For this re
72. carry I O status data transmissions between the processor and the I O chassis Serial communication cables including data highway computer interface data handling and serial I O interconnect cables for remote I O carry data transmissions between processors I O chassis computers and peripheral printers Low level DC I O lines carry low voltage low power signals and their input circuits have short time constant filters so that short pulses can be detected Low level DC I O lines connect to TTL analog encoder counter pulse output fast response thermocouple and other low level DC I O modules ACI O lines and high level DC I O lines have a greater degree of noise immunity than low level DC I O lines High level DC I O lines connect to all DC I O modules not defined as low level Field Wiring Guidelines The following are general wiring guidelines for A B programmable controller components These guidelines are applicable to typical installations for wiring inside and outside the enclosure All AC I O lines and high level DC I O lines can be routed with machine power lines of up to 600V AC feeding up to 100 horsepower devices if this does not violate local codes Article 300 3 of the National Electric Code requires that all conductors AC and DC in the same duct must be insulated for the highest voltage carried by one of the conductors in the duct All low level DC I O lines must be properly shielded and run in a sep
73. cat no 1771 A1B 9 15x 11 25 x 6 75 in 232 4 x 285 8 x 171 5mm 8 slot chassis cat no 1771 A2B 14 15 x 11 25 x 6 75 in 359 4 x 285 8 x 171 5mm 6 3 Chapter 6 Specifications 6 4 1 0 Modules Industrial Terminal 12 slot chassis cat no 1771 A3B 19 0 x 14 0 x 8 7 in 483 x 356 x 221mm 16 slot chassis cat no 1771 A4B 24 15 x 11 25 x 6 75 in 61 32 x 28 58 x 17 15mm I O Capacity Cat No I O Slots Number of I O Per Module 1771 A1B 1771 A2B 8 64 128 256 1771 A3B 12 96 192 384 1771 A4B 16 128 256 512 Maximum I O Configurations 896 I O with seven 128 I O chassis 1792 I O with complementary chassis remote systems only I O module specifications are not included in this chapter If you need their specifications refer to appropriate publications or to our Publications Index publication SD499 However publication 1771 1 2 illustrates the scope of bulletin 1771 I O interfacing capabilities 6 8 An Industrial Terminal cat no 1770 T1 T3 is used with the processor to program edit monitor program instructions and ASCII report generation messages Input Voltage a 120V AC nominal 220 240V AC nominal Input Voltage Range 98 132V AC 120V AC operation 196 250V AC 220 240V AC operation Frequency Range 50 60 Hz 47 63 Hz Chapter 6 Specifications Input Power 75 VA Fuse A 120V AC 0 5A 250V AC Communication Rate
74. cm I Mounting Screws ioei 2 Remove the two bottom module mounting screws and remove the power supply module Important The power supply module cable does not plug into any socket on the auxiliary power supply chassis Mounting dimensions for the 1777 P2 and 1777 P4 auxiliary power supplies are shown in Figure 3 32 After the auxiliary power supply chassis has been properly mounted re install the power supply module into the auxiliary power supply chassis and re attach the front cover panel 3 37 Chapter 3 Assembly and Installation Incoming AC Wiring Guidelines 3 38 Important The information we present here is a summary of the information presented in our Wiring and Grounding Guidelines publication no 1770 4 1 see this publication for full details When bringing AC power into the enclosure the equipment grounding conductor should be connected to the ground bus on the back panel Figure 3 33 and Figure 3 34 If this connection results in a ground loop which is suspected of introducing an objectionable ground current causing faulty operation of the Allen Bradley programmable controller refer to Article 250 21 National Electric Code for recommended methods of reducing objectionable ground current Earth ground should be maintained for the enclosure as referenced in sections PC COMPONENT GROUNDING and ENCLOSURE GROUNDING Local codes and ordinances dictate which earth grounding method is permissible
75. crews on the processor interface module and remove the module Install the replacement processor interface module and tighten the two thumb screws on the module Reconnect I O rack interconnect cable and program panel interconnect cable Turn mode select switch to the PROG position Restore power to system power supply module Monitor diagnostic indicators to assure proper operation Replacing Processor System Power Supply Module Perform the following steps to replace the system power supply module Figure 5 9 1 Turn mode select switch to the PROG position and remove power to the system power supply module Disconnect user power cable and I O rack power cable s to system power supply module Loosen the two thumb screws on the left front panel and remove the panel Remove the bottom two mounting screws on the system power supply module Pull module partially out of the processor chassis Unplug the power cable of the module from the socket on the processor backplane Remove module from processor chassis Partially insert the replacement system power supply module into the processor chassis Chapter 5 Maintenance and Troubleshooting 10 11 12 13 14 15 Plug the power cable of the module into its socket on the processor backplane Fully insert system power supply module into processor chassis Install bottom two mounting screws of the module Reconnect user power cable and I O rack
76. cycle power for start up after shutdown RUN INDICATOR This indicator Figure 5 1 should only be on if the module select switch is in the RUN or RUN PROGRAM position If the switch is in one of these positions and the RUN indicator is not illuminated check the fault indicators I O adapter or I O module indicators MODE SELECT SWITCH A four position mode select switch is located on the front panel of the processor interface module The four positions and their functions are PROG Program position is used when entering program instructions from the programming terminal a Digital Cassette Recorder cat no 1770 SA a Data Cartridge Recorder 1770 S B or a punched paper tape The outputs are disabled when the switch is in this position TEST Test position is used to test program operations under simulated operating conditions The output devices are disabled in this switch position but the program will respond to inputs u RUN In this position the processor scans and executes the user s program that is contained in memory Outputs will be energized and de energized in accordance with the installed program 5 5 Chapter 5 Maintenance and Troubleshooting 5 6 u RUN PROG In this position all of the functions that apply in the RUN position also apply in this position Also you can put the processor in Remote Test and Remote Program Load modes from the industrial terminal The key can be removed wh
77. d Installation Table 3 A Memory Segment Installation Number Socket Socket of Memory Segments 1 2 4 k Represents Memory Segment The memory segments are keyed to ensure proper installation figure 3 2 There are two posts on one end of the memory segment and only one post on the other These posts go into holes on the memory module above and below the memory segment socket permitting only proper installation of the memory segment Figure 3 2 Memory Segment Keying CAT NO 1772 MS MEMORY SEGMENT 2048 Word RAM Mounting Screws ALLEN BRADLEY CO Systems Division Cleveland Ohio Made in U S A 10776 1 Keying Posts 3 3 Chapter 3 Assembly and Installation REMOVAL CAUTION System Power and the backup battery must be removed from the memory module before installing or removing a memory segment If this caution is not followed damage may occur to the memory segment being installed or removed To remove a memory segment from the memory module do the following 1 Remove system power 2 Remove the right front panel cover by loosening the two thumb screws Figure 3 3 Figure 3 3 PLC 2 20 Processor Front Panel D L e f e c Legend D 1 Access memory and processor D modules by removing panel 2 User power connections PROG OL Sean GR O 3 I O rack power socket ze RUN o SUNEROG ZO 4 Program panel socket c I O
78. e is detected as being low Using programming techniques bit 02700 can be examined and used to control an annunciator to alert the user of a battery low condition When the STANDBY LOW indicator starts flashing replace the battery as soon as possible as further minimum life of the battery cannot be predicted MEMORY FAULT INDICATOR The MEMORY FAULT indicator is located on the front edge of the memory module Figure 5 2 It illuminates when an error in the parity of data retrieved from memory is detected Changing the mode select switch to the PROG position resets this circuit The memory should be reloaded and checked in the test mode for another memory fault indication If this indicator illuminates it indicates a memory parity fault has occurred in the transmission of data between the processor control module and the memory module Either module could be causing the problem Replace one module at a time If the first module replacement does not correct the problem re install the original module and replace the other module If replacing this module does not correct the problem replace both modules Local I O Adapter Fault Indicators The I O FAULT indicators are located on the front edge of the 1771 AL I O adapter module Figure 5 4 The following paragraphs detail the indicators and their meanings 5 7 Chapter 5 Maintenance and Troubleshooting 5 8 Figure 5 4 1771 AL I O Adapter Module Fault A
79. e plugged securely into their sockets 4 Verify that all modules are securely held in the I O chassis Verify that the field wiring arms are fully seated on their I O module and locked in place with the locking tab on the I O module 5 Disconnect all motors from their starters valves from their solenoids etc to ensure that no power driven machine motion occurs when power is first applied to the controller Where this is not practical disconnect the wiring at some point other than the I O chassis wiring terminal Each connected input and output device has controller status indicators This paragraph gives the technique for comparing these indicators with the actual status of I O devices This technique is valuable both in initial checkout of the controller and in troubleshooting hardware related faults Each input or output device has the two controller status indicators shown in Figure 4 1 One of these status indicators is on the I O module itself the other indicator is provided by the programming terminal Figure 4 1 I O and Industrial Terminal Status Indicators 10220 1 Chapter 4 System Start Up The I O module status indicator helps to isolate the source of a fault in your hardware devices A hardware related fault may originate from one of these sources Improper I O device operation Wiring error Loss of user supplied power to I O devices The programming terminal status indicator helps to show the relation
80. e proper I O module terminal Output device OFF If the output module indicator fails to illuminate perform steps 3 through 8 again If the indicator still does not illuminate replace the output module as outlined under Module Replacement Important When an output module is replaced its output addresses must be rechecked Perform steps 3 through 8 for each output address 9 10 11 12 Release open the pushbutton and the output should de energize Turn the processor s mode select switch to PROG Change the output address to the next address you want to test by pressing and entering the new address It is important to have only one rung in memory during the testing of outputs Repeat steps 5 through 11 to test each output module address 4 9 Chapter 4 System Start Up USING FORCE FUNCTION WARNING When machine motion is generated an alert competent person must be ready to operate an emergency stop switch which will de energize the master control relay This removes all power from the machine This circuit must be hard wired into the controller and never programmed Using the force function you can turn output devices on and off directly from the industrial terminal To use this method perform the following steps 1 Turn the processor s mode select switch to PROG position 2 Press SEARCH 7 on the industrial terminal keyboard 3 Clear the processor s memory by pressing CLEAR MEM
81. e protected to guard against overcurrent conditions on the input line When replacing this fuse always replace it with one of the same size and rating to avoid possible equipment damage 2 12 I O System Structure Chapter 2 Hardware T O Chassis Power Sockets These two sockets provide power to the I O chassis connected to them These sockets are keyed to guard against improper connection Figure 2 1 An 8 foot Power Cable cat no 1771 CJ or a 3 foot Power Cable cat no 1771 CK is used to interface the power supply with an I O chassis Terminal Strip Input power connections are made to the terminals labeled L1 and L2 Proper connection information is given in section titled Installation WARNING Connect wires only to the two outer terminals of the terminal strip Failure to observe this warning may result in equipment damage and or personal injury DC Power Protection On the left side of the power supply module as viewed from the front are two fuses that guard against overcurrent condition on both the 12V DC and 5 1V DC circuits Figure 2 8 These fuses are accessed by removing the fuse access cover The fuse for the 12V DC circuit is 0 5 amperes located near the top front edge and the fuse for the 5 1V DC circuit is 0 5 amperes located near the bottom front edge I O system structure refers to the proximity of the I O chassis to the processor Because data communication links are distance dependant
82. ed on the door Carefully examine the vendor s product specifications for print pockets mounted on the door and stand off measurements when calculating the working depth of an enclosure General Grounding Information Grounding is an important safety measure in electrical installations With solid state control systems grounding has added value because it helps to reduce the effects of noise due to electromagnetic noise interference EMI Allen Bradley programmable controller components and their enclosure must be properly grounded All applicable codes and ordinances should be observed when wiring the controller The grounding path for the controller components and their enclosure should be provided by a conductor to earth ground green wire In this manual earth ground is defined as the central ground for all electrical equipment All earth ground connections must be permanent and continuous to provide a low impedance path to earth ground for induced noise currents and or fault currents An authoritative source for grounding requirements is the National Electrical Code published by the National Fire Protection Association of Boston Massachusetts Article 250 of the code provides sizes and types of conductors and methods of safely grounding electrical components As defined in the Code a grounding path must be permanent and continuous and be able to safely conduct ground fault currents that may occur in the system to ground with the mi
83. en the mode select switch is in any of the above mentioned positions Processor Fault Indicator There are three fault indicators used in the processor system Figure 5 2 shows the location of these indicators They are normally off and illuminate only if a fault has occurred in the controller The PROCessor FAULT indicator is one of these PROCESSOR FAULT INDICATOR The PROCESSOR FAULT indicator is located on the front edge of the processor control module Figure 5 2 When illuminated you can see this indicator through the window on the right front panel of the processor If the logic controlling the processor scan fails this indicator illuminates Correct this fault by replacing the processor control module Memory Module Indicators Two diagnostic indicators are located on the memory modules These indicators seen through the window on the front panel cover are labeled STANDBY LOW and MEMORY FAULT Figure 5 2 STANDBY LOW INDICATOR The STANDBY LOW indicator is located on the battery pack of the memory module Figure 5 2 It is constantly monitored and flashes on and off when the battery voltage is low It indicates that the battery is low and should be replaced and that memory contents may have been altered Memory contents should be checked and re entered if necessary after new batteries are installed Chapter 5 Maintenance and Troubleshooting A battery low bit bit 02700 cycles on and off when the battery voltag
84. ent is to be installed refer to INSTALLATION section 6 Install backup batteries as outlined in INSTALLATION CAUTION The backup battery must be removed from the memory module before installing or removing a memory segment If this caution is not followed damage may occur to the memory segment being installed or removed 3 5 Chapter 3 Assembly and Installation 3 6 To install a memory segment on the memory module do the following 1 Remove the right front panel cover if installed by loosening the two thumb screws Figure 3 3 2 Remove the memory module located in the right most plastic slot of the processor chassis Figure 3 4 3 Remove the battery housing and disconnect it from the module 4 Insert the memory segment into its appropriate socket The keying tabs aid in proper insertion of the segment Figure 3 2 5 Secure the segment to the memory module by using the two screws on the segment 6 Install backup batteries as outlined in section titled Memory Segments Battery Backup Installation The Battery Housing Cat No 1772 B1 accepts two D size Alkaline cells batteries Cat No 1771 BA or one Lithium cell Cat No 1771 XO See section titled Memory Modules in chapter 2 Battery Backup for a complete memory battery compatibility list Alkaline cells provide approximately six months of battery backup time at 609C 1409F or approximately 12 months at 459C 1139F The cells are not
85. fferent H configuration correct polarity will Orientation be clearly labeld in the battery holder Lithium Battery 10120b I 2 7 Chapter 2 Hardware 2 8 Regardless of cell type used they are not rechargeable Replace these cells at periodic intervals When the STANDBY LOW indicator starts flashing replace the battery as soon as possible as further minimum life of the battery cannot be predicted To avoid loss of memory during battery changes be sure the processor is receiving power and the memory module is firmly seated in the processor chassis when you change the battery CAUTION Memory contents are altered if you remove the cell or cells when the power supply is powered down or off You must re enter the entire memory contents if stored data is lost Memory Write Protect If the memory write protect jumper Figure 2 7 is removed from a 1772 LH processor interface module data table values between address 010g and 377g can be changed but only when the processor is in the PROGRAM or RUN PROGRAM modes using on line data change The remaining words in memory from 400g to the end of memory including data table and user program are protected and cannot be altered by programming The memory write protect feature guards against unintentional changes to processor memory Figure 2 7 Memory Write Protect Jumper
86. h Africa Republic e Spain e Sweden e Switzerland e Taiwan e Thailand e Turkey e United Arab Emirates e United Kingdom e United States e Uruguay e Venezuela e Yugoslavia Allen Bradley Headquarters 1201 South Second Street Milwaukee WI 53204 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Publication 1772 6 6 2 October 1988 PN 955104 18 Supersedes Publication 1772 6 6 2 October 1986 Copyright 1988 Allen Bradley Company Inc Printed in USA
87. ing Assigning I O Rack Numbers When you select 1 slot addressing each slot is an I O group You still assign one I O rack number to eight I O groups therefore in a 16 slot I O chassis you now have two I O racks Figure A 7 Figure A 7 Assigning I O Rack Numbers with 1 slot Addressing Assigned Assigned I O Group No I O rack number 1 I O rack number 2 A Er Tao SA mai TATI Taro Tani moh Tan mo Tai k A 01 23 45 67 01 23 45 i 67 tif ia l T 1 T 1 T 1 T 1 1 L o0 eL LE es j ER TER IER LER LER IER LEER LER LEER LEER LER LEES EU HB HU BIB FRI PET FIERI AIAT AIE I AITEITE amp I B E BI E E B BI BI B IE B FER BI FRY E amp Y ILI ILU 0 lj GI jim ILI I ILI IL ja IL I IL 0 jimi ILI ILU ICI Ii LL jim Lil jum IL jim II jim juu ILI Li I
88. is one of several programming terminals for the controller Figure 2 19 2 27 Chapter 2 Hardware 2 28 Figure 2 19 Industrial Terminal 10697 I You use the industrial terminal system to load edit monitor and troubleshoot the user s program in the processor memorv In addition to programming vou use the industrial terminal for report generation or as an interface for the Data Cartridge Recorder cat no 1770 SB which you use to record and load processor memory onto a magnetic cassette tape Programming can also be done on an Allen Bradley 1784 T45 terminal on a 1784 T50 terminal or on an IBM PC compatible computer using our 6200 series software All Allen Bradley terminals or PC compatible computers using our 6200 series software allow you to use the maximum capabilities of the controller in terms of memory program functions and I O points Contact your Allen Bradley sales office for product information Auxiliary Power Supplies Chapter 2 Hardware If RAM memory is used the controller s power supply provides up to 4 amperes of output current to power the I O adapter module and I O modules When the total output current required to power all of these modules exceeds 4 amperes an auxiliary power supply or supplies are needed The output current to power each I O chassis must be calculated to ensure that its total current draw will not exceed the rating of the auxiliary power supply to be used The exac
89. is recommended for 120V AC Allen Bradlev cat no 1691 N2 for 220 240V AC Electrocube part no RG 1676 13 To minimize EMI generation connecting a supression netwrok is recommended for 120V AC Electrocube part no RG 1676 14 for 220 240V AC Electrocube part no 1676 28 3 40 10207 I Chapter 3 Assembly and Installation In a grounded AC system one side of the secondary of the step down transformer must be connected to the ground bus Figure 3 35 In an ungrounded AC system one side of the ground fault indicator test switch must be connected to the ground bus Figure 3 34 When the chassis of the programmable controller s power supply can not be directly connected to the enclosure or the enclosure ground bus an equipment grounding conductor must be connected to the terminal labeled EQUIPMENT GROUND on the power supply s terminal strip A hard wired master control relay which you supply provides emergency power shutdown for controller I O devices Since the master control relay allows for the placement of several emergency stop switches in different locations its installation is strongly recommended A typical master control relay configuration is shown in Figure 3 34 and Figure 3 35 When any of the emergency stop switches is operated power to input and output devices is removed Power is still supplied to the system power supply so that the processor can continue to operate even though all of its inputs and ou
90. m cell 2 7 3 8 Maintenance and Troubleshooting 5 1 Memory Fault Indicators 5 6 5 7 Memory Module 2 5 3 2 5 13 Memory Module Indicators 5 6 5 Mode Select Switch 2 10 5 Noise Electrical 3 18 0 Operating Temperature 3 18 Output Module 2 20 Output Module Fuse Indicator 5 11 Output Modules 2 20 P PC Definition 1 1 PLC 2 20 2 1 PLC 2 20 and PLC 2 30 A 16 PLC 2 20 Processor 2 1 2 2 3 4 6 1 PLC 2 30 Processor 2 1 2 2 2 14 6 1 PLC2 20 and PLC 2 30 Processors 2 1 Power Supply 1 3 2 1 2 29 5 15 Auxiliary Power Supply 2 1 3 34 5 17 Compatibility 2 31 Configuration Plug 3 11 Module 1 3 2 11 Power Requirements 3 21 Specifications 6 1 System Power Supply 2 11 5 2 Preassembly and Installation 1 2 Precautionary Notes 1 2 Preventive Maintenance 5 1 Procedures 4 4 Processor Assembly 3 1 Chassis 2 1 chassis 6 3 Control Module 2 2 2 3 Fault Indicator 2 3 Front Panel Indicators 5 2 Interface Module 2 9 Program Panel 2 9 Programming Terminal 2 27 3 56 4 4 Installation 3 56 R Recorder Data Cartridge 2 28 Remote I O Installation 1 3 Replace Processor Interface Module 5 14 Replacing A Processor Memorv Module 5 13 I O Modules 5 16 Processor Control Module 5 14 Processor System Power Supply 5 15 Run 2 10 S Spare Parts 5 1 STANDBY LOW 3 6 Standby Low 2 8 3 6 Start up 2 26 4 1 4 4 4 10 4 12
91. n lists the adapters and what modes they can address 2 Slot Addressing The processor addresses two I O module slots as one I O group Each physical 2 slot I O group is represented by a word in the input image table and a word in the output image table Each input terminal corresponds to a bit in the input image table word and each output terminal corresponds to a bit in the output image table word The maximum number of bits available for one 2 slot I O group is 32 16 bits in the input image table word and 16 bits in the output image table word The type of discrete I O module you install either 8 point standard density or 16 point high density used in complementary mode determines the number of bits in the words that are used You select 2 slot addressing by setting two switches in the I O chassis backplane switch assembly See your scanner s or adapter s users manual for the specific switches and their settings A 3 Appendix A Addressing A4 Using 8 Point I O Modules I O modules generally provide eight input terminals or eight output terminals Figure A 2 illustrates the 2 slot I O group concept with two 8 point input modules Figure A 3 illustrates the 2 slot I O group concept with an 8 point input and an 8 point output module
92. n netwrok is recommended for 120V AC Electrocube part no RG 1676 14 for 220 240V AC Electrocube part no 1676 28 10207 1 3 39 Chapter 3 Assembly and Installation Figure 3 34 Typical Power Distribution with Master Control Relay of an Ungrounded System Incoming Li jt jh Disconnect w 7 J Multiply the power requirements of the PLC power supplies by 2 5 to 3 and F F F add all other power requirements U U U to determine the required rating of the transformer E EE IL IL Ilg Hio Ha Sy 5 To Motor H H l l Isolation Starters COPIER Step Down Transformer Backplane Enclosure hp sy Ground Bus Wall FUSE O FUSE N 4 Xi x tt iT 2LT Neat duci A VW rounding Electrode o Equipment Conductor to A i qe Se Grounding Earth Ground Use any number of E Stop Conductors Gran switches in Series FUE Start System i i ali e T HE d T caw e n hd CRM Connect onnec PC When Power Supply Applicable Li Lo e User DC CRM CRM Supply e SUE l Output CRM TN Device Lo ot To DC I O LoT o Devices Input LI Device To minimize EMI generation connecting a supression network
93. n the rear panel This filter should be cleaned and checked periodically This must be done with power removed from to the industrial terminal The 1770 T3 Industrial Terminal system is connected to the processor with the Program Panel Interconnect Cable Cat No 1772 TC One end of this cable is connected to the socket labeled CHANNEL A PLC 2 on the rear of the industrial terminal the other end to the socket labeled PROGRAM PANEL on the processor Figure 3 46 Line voltage configurable industrial terminals are factory shipped configured for 120V AC operation If the industrial terminal is to be used on a 220 240V AC input line refer to the appropriate industrial terminal system user s manual for changing the AC setting and AC fuse Refer to the same user s manual for operating procedures Also refer to the following manuals PLC 2 20 Programming and Operations Manual publication 1772 6 8 1 a PLC 2 30 Programming and Operations Manual publication 1772 6 8 3 Start Up Checkout Before Applying Power System Start Up Careful start up procedures are essential for proper controller operation These procedures should be followed after the complete controller system has been assembled and installed as described in chapter 3 of this manual A cautious approach must be taken toward the initial start up procedure Care and patience during start up isolate problems that might occur in the form of programming errors wiring mi
94. ng Terminal Installation 3 56 System Start Up sssesessasannasnanzonsezzznnata 4 1 DINU e enois meena eane REX Rees aX be Res 4 1 Checkout Before Applying Power Lsluusluuesus 4 1 Hardware Indicator Comparison 200 4 2 TI AB Using The Industrial Terminal at Start Up Table of Contents Maintenance and Troubleshooting General inca Sete ee RS ERE Pre riu ox Preventive Maintenance 0 00 cece eee eaes Spare PANS sere awt Ohad den E e QUUM EGET cee ee Aes Troubleshooting 00 0 ccc cece eee ee eee eens Rules for Module Replacement 0000 ce eaee Specifications 24er rrr RE RET RIERE SS General 23 43 bl we od Sh REY See alid PLC 2 20 Processor 0 cece cece Re PLC 2 30 Processor 00 eee PLC 2 20 PLC 2 30 Memory Modules AC Power Supplies 000 nennnna 24 Volt DC Power Supplies 0000 I O Chassis e cs Sas per P EREPERQWeE DE ER EREIRRRENIS I O Modules ieu Seba ei l rnb DOLES Industrial Terminal 1 0 0 eee Addressin ie xa l a a ao Appendix Objectives LL Addressing Your Hardware 0 000 ccc cece eens Addressing Modes 00 00 c cece ence nee eees System Configurations 00 cece eee eee eee General PC Definition Fundamental Concepts Introduction The PLC 2 20 and 2 30 Programmable
95. nimum impedance Also the connections to a grounding conductor must be of a permanent nature Local codes and ordinances dictate which grounding method is permissible PC COMPONENT GROUNDING The recommended configuration for grounding programmable controller components within an enclosure is shown in Figure 3 19 To ensure good electrical contact between controller components the enclosure back panel and the enclosure bare metal contact is required Paint or other nonconductive finishes must be scraped from the back panel where it comes in contact with the component mounting bolts nuts or welded studs An 8 gauge or larger copper or equivalent wire should be used to connect each component in the enclosure Connections should be made to the mounting bolts or studs on only one mounting bracket of the component s chassis 3 23 Chapter 3 Assembly and Installation Figure 3 19 Typical PLC 2 30 Controller Grounding Configuration Grounding Electrode Enclosure Conductor Ground Bus e opoo s LOG e B e je An o oye x To A ka rocessor S iban eu DES Chassis rounding ee i Grounding Conductor ection 2 0 Conductor Ground s jS Lug See giis figure 8 H d
96. nstant Voltage Transformer 3 21 Control Module 2 2 5 14 D Data Cartridge 4 13 Data Cartridge Recorder 1 2 2 28 5 5 Diagnostic Indicators 2 18 5 1 ACTIVE 2 19 5 8 DC ON 2 10 5 2 5 5 5 11 Local I O Adapter Fault 5 7 Output Module 5 11 Processor Fault 5 6 Processor Front Panel 5 2 RACK FAULT 5 8 Rack Fault 2 18 Remote I O Adapter Fault 5 10 RUN 2 10 4 9 4 13 52 STANDBY LOW 2 8 5 6 Diagnostic indicators 2 19 E Electrical Noise 3 18 Enclosure 2 15 3 22 Enclosure Considerations 3 22 F Field Wiring Arm 2 26 3 15 3 46 Installation 3 15 Field Wiring Guidelines 3 45 Force Function 4 10 Fundamental Concepts 1 1 Fuse 2 12 6 5 Input 2 12 Main 3 56 Index G Grounding Information 3 23 H Hardware 4 2 A 1 I O Adapteer Module Installation 3 13 Chassis 3 9 chassis 6 4 Installation 1 3 Interconnect 5 17 Wiring Installation 3 46 I O Adapter Module 2 15 3 13 A 16 Local 1771 AL 2 17 Remote 1771 ASB 2 18 I O Adpater Module 1 3 I O Interconnect 5 8 I O Module Addressing 2 22 Installation 3 13 Incoming AC Wiring Guidelines 3 38 Indicators Diagnostic active 2 18 DCON 2 10 52 RUN 2 10 Standby Low 2 8 Industrial Terminal 2 27 3 56 6 4 Input Fuse 2 12 ico Input Modules 2 20 4 3 Input Power Connection 3 10 Interface Module 2 1 2 9 K Keing Band Installation 3 12 Keying 2 17 2 19 3 12 L Lithiu
97. nt 101954 Figure 3 16 Typical Suppressrion for 3 Phase Inductive Load Electrocube E ad Part No 1676 13 3 required CR5 e CR5 L e CR5 047uf 2202 ANN a tay E Discrete Component Equivalent 3 required 10194 3 19 Chapter 3 Assembly and Installation Figure 3 17 Typical Suppression for Larer AC Indutive Loads 120V AC WWW Electrocube Part No 1676 14 047uf 2202 ANIA ER V130 LA1 Discrete Component Equivalent 10195 1 Figure 3 18 Tvpcial Suppression for a Small DC Inductive Load 120V AC et K PIV Peak Inverse Voltage rating of diode must be at least twice the applied DC voltage 10196 1 3 20 Constant Voltage Transformer Chapter 3 Assembly and Installation All possible sources of noise should be suppressed Best results are achieved when the noise suppressing networks are connected as closely as possible to the noisy device In applications where the AC line is especially unstable and subject to unusual variation use a constant voltage transformer to stabilize the input voltage to the power supply as well as the input voltage to your devices A constant voltage transformer compensates for voltage changes at its input in order to maintain a steady voltage at its output If a constant voltage transformer is required it must be connected to the system power supply and
98. nterrupted 2 5 Chapter 2 Hardware Figure 2 4 Memory Module Showing Battery Holder A BCD Memory Segments Battery Assembly Q a 10162 1 You may use lithium cells with 1772 ME Revision K or later u any 1772 MEB MES or ME16 memory modules A lithium cell provides approximately two years of memory backup at a maximum of 60 C 140 F This cell is not rechargeable You may use alkaline cells with 1772 ME all revisions u any 1772 MEB ME8 or ME16 memory modules 2 6 Chapter 2 Hardware Two D size alkaline Panasonic cells Figure 2 5 provide approximately six months of battery backup time at 60 C 140 F or approximately 12 months at 459C 1130P Figure 2 5 Battery Housing Showing Two Alkaline Cells Installed If the battery housing has a different configuration correct polarity will be clearly labeld in the battery holder Orientation e Alkaline Alkaline Battery Battery Exchange Clips 1012021 The one D size lithium cell Figure 2 6 cell provides approximately 2 years of battery backup time at a maximum of 60 C 1400F Figure 2 6 Battery Housing Showing a Lithium Cell Installed F If the battery housing has a di
99. o seat it firmly into its sockets 3 13 Chapter 3 Assembly and Installation Figure 3 10 1771 I O Rack Components FTI __ Ld PLC 2 I O Adapter Module Module i Modules Aux P d Lockin h ane atch Guides lie y y Gee o o o o 32 I O 64 I O 128 I O o dep i 9 o LS M aes Gs U U U IL 2 A Sod G A A A A NU e it Module Extraction Tab I O Power Cable Wiring Arm Locking Tab Uf Field Wiring Arm SERM I O Module 10188 1 After each pair of I O modules a module group is installed secure these modules in place with the module locking latch Figure 3 10 After the I O module has been properly seated and locked into place its field wiring arm can be attached Chapter 3 Assembly and Installation Field Wiring Arm Installation A field wiring arm Figure 3 11 for each I O module slot is shipped with the I O chassis The lower end of the field wiring arm forms a C shaped bracket which snaps onto the horizontal bar of the I O chassis Figure 3 12 Once the field wiring arm is in place on the chassis it pivots on the chassis cross bar Figure 3 13
100. occur There are two methods for testing outputs The first uses a convenient readily accessible pushbutton or similar normally open momentary close device This pushbutton may be part of an operator panel or may be specifically installed for start up or troubleshooting purposes You ll use the pushbutton to energize each output one at a time The second method when a pushbutton or similar device is unavailable is to use the force function of the industrial terminal to energize each output one at a time To test analog output modules refer to the appropriate user s manual USING A PUSHBUTTON Connect a pushbutton as an input to the controller for testing the outputs 4 7 Chapter 4 System Start Up 4 8 CAUTION To avoid possible damage to the input module that the pushbutton switch is wired to be sure that the voltage source used with the pushbutton is within the voltage and current range of the input module Now enter a single rung which examines the state of the pushbutton and when energized turns the output on Figure 4 3 Figure 4 3 Rung for Testing Output Devices Using a Pushbutton Address of an unused Address of output input terminal for device to be tested 3 pushbutton 11017 01100 To use this method perform the following steps 1 Turn the processor s mode select switch to PROG position 2 Press SEARCH 1 on the industrial terminal s keyboard 3 Clear the processor s memory by pressing CLEAR
101. onnect to the wiring arm Figure 3 39 Figure 3 39 Trim Foil and Unnecessary Insulated Wire Wire trimmed off insulation P off 30 twisted is 2 shield wire 10709 1 go See Foil Removed 3 ft of insulation stripped from cable 2 Strip off the exposed foil It may be necessary to insulate the bare drain wire with tape or shrink tubing along areas where it might otherwise come into contact with wiring arm terminals 3 Trim both insulated wires to 2 inch lengths Then strip approximately 3 8 inch of insulation from the end of each wire The shield strand is left at its full 3 foot length figure 3 39 Chapter 3 Assembly and Installation 4 Connect the insulated wires at the wiring arm terminals specified in the appropriate publication Fold back the bare drain wire as you route the cable The insulated wires connect to the user device at the other end of the cable 5 Connect the bare drain wire to ground Route it from the wiring arm to an I O chassis mounting bolt The shield strand should be placed between the I O chassis mounting bracket and the flat washer before the nut is tightened A lug can be used Figure 3 40 In applications where many shielded cables are connected at a single I O chassis it may be necessary to provide a ground bus for connection of many wires or to solder several drain wires together at a wiring arm so that only one drain is routed out Figure 3 40 Cable Shield Grounding
102. ossible injury to personnel 4 4 Chapter 4 System Start Up You must make certain that no program has been entered into the processor s memory To clear the processor s memory of instructions and to reset the data table connect the industrial terminal to the processor as outlined in section titled Programming Terminal Installation chapter 3 and perform the following steps it may be helpful to have read or at least have on hand the Industrial Terminal Systems User s Manual publication 1770 6 5 3 1 Apply AC power to the controller s power supply and to the industrial terminal The keyboard and PLC 2 keytop overlay must be installed on the industrial terminal 2 Turn industrial terminal s power switch on 3 After the MODE SELECTION message is displayed on the screen press 1 1 on the keyboard 4 Turn the mode select switch on the processor to the PROG position 5 Press SEARCH 1 on the keyboard 6 Regardless of what is displayed press CLEAR MEMORY 9 9 on the keyboard A CLEARING MEMORY message is displayed on the third line from the bottom while memory is being cleared The END statement appears on the screen when memory has been cleared Only the rungs discussed in this paragraph should be used for the checkout procedures Only one rung at a time should be in memory for the start up procedures Important Power is to be connected to the system power supply auxiliary power supply if used
103. p 1 Address Address 111 Rack D Js I O Group 121 10236 1 Note When addressing a block transfer module it must be addressed bv the lowest group number that it occupies and at slot 0 For example a two slot block transfer module in rack 1 groups 2 and 3 would be addressed by Rack Group Slot at location 120 Also see the appropriate block transfer module user s manual Block Transfer modules must be located in the same slot pair i e slots 0 1 2 3 4 5 etc or they will not work Some two slot block transfer modules use the lower slave bus on the I O chassis backplane for intramodule communication Appendix A Addressing A 12 1 2 Slot Addressing When you select 1 2 slot addressing the processor by way of the adapter addresses one half of an I O module slot as one I O group The physical address of each I O slot corresponds to two input and two output image table words The type of module you install 8 16 or 32 I O pts determines the number of bits in these words that are used With 1 2 slot addressing since 32 input bits and 32 output bits are set aside in the processor s image table for each slot 16 input image table bits and 16 output image table bits times 2 groups per slot 32 of each you may use any mix of I O modules 8 16 or 32 pt in the I O chassis You select 1 2 slot addressing by setting two switches in the I O chassis backplane switch assembly See your scanner s or adapter s
104. port removable solid state Random Access Memory AM and contains support ciruitry needed to store and retrieve memory information Each contains a battery pack for memory backup support Maximum memory capacity is SK K 1024 words for the 1772 ME and 16K words with the 1772 MEB Chapter 2 Hardware The following memory segments Figure 2 3 are used with the CMOS RAM memory module 512 word memory segment cat no 1772 MT 2048 2K word memory segment cat no 1772 MS 8192 8K word memory segment cat no 1772 MS8 Combinations of up to a maximum of four segments are possible for example a 2K 1772 MS and an 8K 1772 MES provide 10K words of storage However you are limited to 8K words when using the 1772 ME and 16K words when using the 1772 MEB Memory segments 1772 MS and 1772 MT have a case that can be secured to the memory module with mounting screws Figure 2 3 Memory Segment CAT NO 1772 MS MEMORY SEGMENT 2048 Word RAM ALLEN BRADLEY CO Systems Division Cleveland Ohio Made in U S A Cat No 1772 MS MS8 10247 1 Battery Backup A Battery cell Housing cat no 1772 B1 is shipped mounted on the memory module Figure 2 4 This battery housing will hold two Alkaline Batteries cat no 1771 B A or one Lithium Battery cat no 1770 X0O The battery housing provides a convenient location for battery backup power to guard against loss of memory if power from the power supply is i
105. power cable s to the system power supply module Re attach left front panel Restore power to system power supply module Observe the diagnostic indicators to assure proper operation I O Adapter Module Perform the following general steps to replace a 1771 AL Local I O adapter or 1771 ASB Remote I O adapter module Figure 5 10 Figure 5 10 1771 0 Rack Field Wiring Arm Locking Ta 5 16 Module Locking Latch Module Injection Tab U HEHHEHH HHE 10228 1 Chapter 5 Maintenance and Troubleshooting 1 Turn the mode select switch to the PROG position and unplug the power cable from the system power supply or auxiliary power supply providing power to the I O chassis in which the suspect module is located 2 Disconnect the I O interconnect cable s and I O termination plug if used on this module 3 Unlatch the I O module locking latch at the top of the chassis and remove the module 4
106. publication for full details When the controller is operating in a noise polluted industrial environment give special consideration to possible electrical noise interference Potential noise generators include inductive loads such as relays solenoids and motors and motor starters when they are operated by hard contacts such as push buttons and selector switches In the case of reversing motor starters hard contacts are wired to make each starter electrically as well as mechanically interlocked In this case suppression is needed at the device because of the hard contacts in the circuit with the load Suppression for noise generators may be necessary when these types of loads are connected as output devices or when connected along the same AC line which brings in power to the controller A suggested electrical noise suppression unit for small AC devices that is relays solenoids and starters up to NEMA size 1 is shown in Figure 3 15 For larger contactors of size 2 and above a parallel varistor for transient voltage limitation is needed in addition to the RC network as shown in Figure 3 16 and Figure 3 17 DC relays are suppressed by free wheeling diodes as shown in Figure 3 18 Chapter 3 Assembly and Installation Figure 3 15 Typical Suppression for A Small AC Inductive Load lt 120V AC ElectroCube Part RG 1676 12 0 5 uf 220 Q ANA Discrete Component Equivale
107. put Devices Address for each Use a Dummy input to be tested output address 11000 02000 esl BE ose 5 Turn the processor s mode select switch to TEST position 6 Manually turn the input device on and observe the rung display When the device is on the input instruction should intensify when the device is off the input instruction should be at normal intensity Chapter 4 System Start Up Should the input instruction fail to intensify verify that steps 1 through 6 were performed as written If they were performed correctly replace the input module section titled Replacing I O Modules chapter 5 After the module has been replaced perform steps 1 through 6 If the input instruction on the screen still does not intensify refer to chapter 5 of this manual Repeat steps 1 through 6 for each input device in your application In step 4 replace the input device address with the new address of the device your testing Do not program multiple rungs for checkout purposes Use only a single rung display To test analog input modules refer to the appropriate user s manual TESTING OUTPUTS After all inputs have been tested the outputs should be checked next Some output devices are disconnected and must remain disconnected during this checkout procedure CAUTION Machine motion during this procedure can cause injury to personnel or damage to equipment Disconnect any device which when energized might cause machine motion to
108. r Supply Compatibility The 1772 P1 and 1772 P4 power supplies have been produced as series A B and C The following summarizes the functional characteristics of each series Series A The original production level It operates only a PLC 2 family processor It will not operate I O or remote I O Series B This series provides power sufficient for use in local or remote I O configuration with all PLC 2 family processors Series C This series increased the output current over the Series B 9 amps vs 8 amps 2 31 General Processor Assembly Assembly and Installation A well planned layout is essential for the installation of the programmable controller Various considerations necessary for planning the installation are contained in this chapter A primary consideration in programmable controller installation and operation is safety The procedures in this chapter are presented with consideration for the safety of the operator of the controlled equipment and of the controller These procedures are intended to supplement the applicable codes and ordinances which govern wiring and installation practices Personnel installing the controller system should become familiar with local codes as well as these procedures Once the assembly of the components that make up the controller is completed as well as the planned layout installation of these components into a workable controller system can begin Procedures for assem
109. r process controlled by your ladder diagram program This approach is to test with the least amount of machine motion possible Connect one output device at a time that generates machine motion and test for proper operation Before continuing review your ladder diagram After this is completed the final system check can begin Consult the appropriate Programming and Operations Manual for start up information that relates to the programmer Also refer to that manual for information on program debugging FINAL SYSTEM CHECKOUT WARNING When machine motion is generated an alert competent person must be ready to operate an emergency stop switch which will de energize the master control relay This removes all power from the machine This circuit must be hard wired into the controller and never programmed 1 Turn the processor s mode select switch to PROG position 2 Press SEARCH 1 This causes the first rung in memory to appear 3 Press CLEAR MEMORY 9 9 This clears the entire processor memory When the memory has been cleared the END statement is displayed 4 Enter the ladder diagram into memory 4 12 10 Chapter 4 System Start Up Turn the processor s mode select switch to TEST position Examine the program and check the programming of parallel branches and make sure that no output device is energized unconditionally Restore the connection from an output module to a single output device that cause
110. rack socket eo Main input fuse N DC ON indicator co RUN indicator DIAGNOSTICS oo o p 9 Four position mode select switch 10 Svstem power supplv module ee located here P Ie ai zv e AV 10160 1 3 Remove the memory module located in the right most plastic slot of the processor chassis Figure 3 4 34 Power Supply Module Chapter 3 Assembly and Installation Figure 3 4 Processor Module Locations N DU S G Lo j bc IPA e E e D D Processor fa Pegs Chassis H D L P e J99 5 e Battery 600 Housing Processor i Fault Ba 3 I ul Memory 868 BSE ini Si Fault cm Standby Low gt fj fo o o I iu Memory Power Processor Module Supply Interface Processor Module Control Slot Module Slot 10161 1 4 Remove the battery housing and disconnect from the module 5 Loosen the two mounting screws on the memory segment and remove the memory segment from its socket If another memory segm
111. rape paint and use star washer Ground Bus or Mounting Bracket Back Wall 8 of Enclosure Back Panel e Lo Flat Washer Use a wire brush to remove paint from threads to allow a ground connection 2 Welded Stud Ground Lug Scrape paint and lt gt use star washer P d Stud Mounting of this Back Panel to the Back Wall of the Enclosure AS B Welded Stud Back Panel Flat Washer Stud Mounting of a Ground Bus or Chassis to the Back Panel 10123 1 Ground Lug Each vertical group of components is connected together Figure 3 19 and these groups are connected to a ground bus mounted on the back panel of the enclosure Figure 3 20 and Figure 3 21 The ground bus is connected to a ground lug that is mounted on the inside wall of the enclosure Figure 3 22 Avoid connecting more than two lugs to a single bolt because the connection can become loose due to the compression of the metal lugs Chapter 3 Assembly and Installation CAUTION Care must be taken not to allow the I O chassis to warp when mounted This may occur if the back panel is slightly curved Chassis distortion can cause stress on the printed circuit board of the chassis backplane This may result in the poor connection of the I O modules and their backplane sockets To avoid the problem of warping carefully inspect the spacing between the chassis mounting brackets
112. re shown in Figure 3 27 Figure 3 28 and Figure 3 29 3 32 Chapter 3 Assembly and Installation Figure 3 27 1771 4 Slot I O Chassis Mounting Dimensions 0 35 8 25 lt 9 6 mm 209 5 mm a e 14 t 35 8mm 12 41 10 0 315 2 mm i e 2 254 mm 5j Ground Stud Power dos fun ja K Connector pn D 2 e ejn c e l iiim 75 01 F 17 15em r 228 8 A i EJ The plug shown is used with the Eam U pico ijo Adapter oniv The Batterv Pack is used with the PLC 2 Mini Processor and the Mini PLC 2 15 Processor 10124 I Figure 3 28 1771 8 Slot and 16 Slot I O Chassis Mounting Dimensions EE m 59 44cm 128 1 0 13 4 34 04cm 64 I O m B e A f gu J I E 11 25 10 0 28 5cm e p e
113. ribe input power connections to 1772 P1 1777 P2 Power Supply a 1772 PA 1777 P4 Auxiliary Power Supply 1771 P2 Auxiliary Power Supply Power connections to other power supplies for I O are similar See the appropriate product data sheet for wiring details POWER SUPPLY PUB P N 1771 P3 P4 P51771 2 111 1771 P7 1771 2 93 1772 P1 1777 P2 POWER SUPPLY Located near the bottom of the system power supply module processor and auxiliary power supply is an external power terminal strip to which incoming AC line connections are made Figure 3 43 The system power supply module is factory shipped configured for 120V AC operation Figure 3 43 Exernal Power Terminal Strip AC FUSE 2A 250 VAC SLOW BLOW 1 0 RACK POWER cool OUO VA Q O QAI Q O Q I O Power Sockets N 120V ii JUMPERS A el e aA 9 9 9 amp amp C2 C2 C2 C3 C2 6 U LI LI YT LI Li D e 1 m e JUMPER 10216 1 You must re position the external power terminal strip jumpers for 220 240V AC operation Jumper positions for both 120V and 220 240V AC operation are shown at the terminal strip Figure 3 43 Chapter 3 Assembly and Installation AC input line connections are made to L1 and L2 LI is the high side of the AC line L2 is the low side No connection is made to the equipment ground terminal when the grounding configuration sho
114. rocessor and output modules There are two sockets located on the front panel of the I O adapter module Figure 2 11 The top socket receives the I O connector cable from the processor or the previous I O chassis The bottom socket mates with the I O connector cable going to the next I O chassis or the Termination Plug cat no 1777 CP if this I O chassis is the last one in the system Diagnostic indicators on the front panel of the I O adapter module Figure 2 11 aid in troubleshooting These indicators are as follows u ACTIVE Illuminates when proper communication is established between the processor and the I O chassis It also indicates that DC power is properly supplied to the I O chassis It is normally on u RACK FAULT Illuminates when I O data is not in the proper format It is normally off WARNING Remove system power before removing or installing a module in the I O chassis Failure to observe this warning could result in damage to module circuitry and or undesired operation with possible injury to personnel See publication No 1771 2 95 for complete product information I O Scanner Distribution Panel 1771 SD2 and Remote I O Adapter Module 1771 ASB Proper transmission of data between the processor and remote I O chassis that is chassis that are 6 to 10 000 ft or 2 to 3048 meters away requires a 1772 SD2 I O Scanner Distribution panel You mount this panel within 6 cable feet of the processor You then in
115. s machine motion Check the behavior of the output device re connected in step 6 Energize the appropriate output in the program then turn the processor s mode select switch to RUN Disconnect the output device just tested Repeat steps 6 through 8 for each output device causing machine motion that you had previously disconnected After checking the controller and program check the application with all output and input devices connected Important After the entire system has been checked out we recommend that you make a copy of the program with the optional Data Cartridge Recorder cat no 1770 SB 4 13 General Preventive Maintenance Spare Parts Maintenance and Troubleshooting The controllers are designed to minimize the need for maintenance and troubleshooting procedures Troubleshooting the majority of controller faults requires no special test equipment or programming techniques Instead status and diagnostic indicators on the controllers help to isolate the source of a fault in the user s hardware or in the controller itself The controller is an electrical system comprised of printed circuit boards that are vulnerable to dirt and dust Every effort has been made to enclose this circuitry to limit its exposure to dust dirt and soot The processor modules are enclosed in the metal processor chassis the I O adapter module and the I O modules are each enclosed in a tough plastic case The interior of the enclo
116. s should be installed in the backplane socket by hand These bands can be easily repositioned when I O module requirements change Chapter 3 Assembly and Installation I O Adapter Module Installation The I O adapter module is installed in the left most slot of the I O chassis Figure 3 9 Open the module locking latch and insert the module After the module has been properly seated close the latch to secure the module in place Figure 3 9 1771 AL I O Adapter Module Module Locking Latch ES Y c PLC 2 I O i Adapter Module H J ee AAA 10187 1 I O Module Installation After each I O module slot has been keyed the corresponding I O module can be installed into the I O chassis Open the module locking latch to insert the I O module On the top and bottom of each slot plastic guides permit the module to be easily slid into the chassis Figure 3 10 Do not force the module into its backplane socket but rather apply firm even pressure t
117. select switch Figure 2 1 Interface Sockets The 15 pin socket labeled PROGRAM PANEL Figure 2 9 links the processor with its programming terminal One end of the Program Panel Interconnect Cable cat no 1772 TC attaches to this socket and the other end attaches to the Industrial Terminal cat no 1770 T3 or a 1784 T45 or a 1784 T50 or other IBM PC compatible with 6201 or 6211 software The 50 pin I O chassis socket accepts the I O Interconnect Cable cat no 1777 CA CB or the Processor Scanner Interconnect cable cat no 1772 CS Either of which links the PLC 2 20 or PLC 2 30 processor to the I O system 2 9 Chapter 2 Hardware 2 10 Indicators DC ON INDICATOR This front panel indicator Figure 2 1 illuminates when the appropriate power is applied to the system power supply module RUN INDICATOR This indicator Figure 2 1 should only be on if the module select switch is in the RUN or RUN PROGRAM position Mode Select Switch A four position mode select switch is located on the front panel of the processor interface module The four positions and their functions are PROG Program position is used when entering program instructions TEST Test position is used to test program operations under simulated operating conditions Your output devices are disabled in this switch position but the program will respond to inputs RUN In this position the processor scans and executes the user
118. should be replaced Remote I O Scanner Distribution Panel Indicators The front of the 1772 SD2 distribution panel has eight bicolor red green LED indicators Figure 5 5 If the I O chassis is used and serial communication is valid the RACK STATUS indicator will be green If the I O chassis is not used the indicator is off For an I O rack fault condition the corresponding RACK STATUS indicator will be red The rack 0 indicator will also go to red if there is a dependent I O fault Figure 5 5 1772 SD2 Scanner Distribution Panel Status Indicators Rack Status Indicators OOOOOOOO 10224 5 9 Chapter 5 Maintenance and Troubleshooting Remote I O Adapter Fault Indicators Three diagnostic indicators are located on the front of the 1771 ASB adapter Figure 5 6 Figure 5 6 1771 ASB Remote I O Adapter Module Status Indicators Status Indicators 10225 1 These indicators are ACTIVE Illuminates when proper communications have been established between the 1772 SD2 distribution panel and the 1771 ASB adapter DC power is properly supplied to the I O chassis and 1771 ASB adapter is actively controlling the I O The ACTIVE indicator is normally on ADAPTER FAULT Illuminates when the module is not operating properly It tells you that a fault has been detected and that the I O chassis has responded in the manner selected by the last state switch When
119. stakes or equipment malfunction The procedures outlined provide you with a means of uncovering problems under controlled conditions This not only make it easier to pinpoint problems but also minimizes possible equipment damage or personal injury In general certain checkout procedures must be done before power is applied to the controller components afterward other procedures are performed with power applied to all devices except those that allow any machine motion Finally the system is checked out with the machines in motion WARNING Machine motion during system checkout can cause injury to personnel or damage to equipment During the first stage of checking out the system disconnect any device which when energized might cause machine motion to occur The following steps must be performed before AC power is applied to the controller 1 Verify that the jumper selected voltage settings on the processor auxiliary power supplies and programming terminal match the incoming line voltage Also verify that the line voltage is within tolerance For 120V AC operation the normal range is 98 132V AC for 220 240V AC operation the normal range is 196 250V AC and for 24V DC operation the normal range is 20 5 32V DC 2 Verify that the wiring of the main disconnect and master control relay is correctly installed 4 1 Chapter 4 System Start Up 4 2 Hardware Indicator Comparison 3 Verify that the power cable connectors ar
120. stall a 1771 ASB Remote I O Adapter module in the left most slot of each remote I O chassis Chapter 2 Hardware The front of the 1772 SD2 Scanner Distribution panel has eight bi color red green RACK STATUS indicators to aid in troubleshooting u if OFF an I O chassis is not connected u if GREEN an I O chassis is used and serial communication is valid u if RED an I O fault condition exists u if RACK 0 is RED there is a dependant I O fault Three diagnostic indicators are located on the front of the 1771 ASB adapter These indicators are ACTIVE Illuminates when proper communications have been established between the 1772 SD2 distribution panel and the 1771 ASB adapter DC power is properly supplied to the I O chassis and 1771 ASB adapter is actively controlling the I O The ACTIVE indicator is normally on ADAPTER FAULT Illuminates when the module is not operating properly It tells you that a fault has been detected and that the I O chassis has responded in the manner selected by the last state switch When this indicator is on the other indicators are no longer valid The ADAPTER FAULT indicator is normally off I O RACK FAULT Illuminates when a fault has been detected at the 1771 ASB adapter the I O chassis or the logic side of the I O modules The I O RACK FAULT is normally off Important For a full listing of the possible combinations of these indicators on off or blinking see
121. stallation Figure 3 22 Details of Ground Connections at the Enclosrue Wall Enclosure Wall Inside Scrape paint on both sides Star washer Ground lug Enclosure Wall Outside Star washer Conductor x Equipment Grounding Nut 10118 1 Component Lavout The controller components must be spaced sufficiently from other equipment and the enclosure walls to allow convection cooling Convection cooling draws a vertical column of air upward over the controller module surfaces To keep the controller modules within the specified temperature limits this cooling air drawn in at the base of the controller must not exceed 609C 1409F Because of this vertical flow of air the unobstructed vertical spacing above and below the controller components is important The installation layout for a controller is dependent upon the quantity and types of components that will make up the system The following rules govern component placement in an enclosure 1 Mount the processor and auxiliary power supply above other controller components because there is a much higher heat dissipation in the power supplies than any other controller component 2 Distance between auxiliary power supplies and the I O chassis is shown in Table 3 E 3 26 Chapter 3 Assembly and Installation Table 3 E Power Cable Lengths Cable Chassis Power Supply Cable Length Cat No 1771 MB 1771 P1 P2 Chassis 1771 CL 1771 A2B
122. strip that pivots up and down for quick easy insertion and removal of I O modules Figure 2 17 Figure 2 18 This aids in start up and troubleshooting by shortening the time needed to replace I O modules thus helping to decrease down time Field Wiring Arms are shipped with the modules Figure 2 17 Example 1771 8 Pt Field Wiring Arms UOODUUODOUuoO oDO emNesosaua 3 a 10174 I Series A Series B 2 26 Programming Terminal Chapter 2 Hardware Figure 2 18 Example 1771 16 Pt Filed Wiring Arm l H Qh Qa WIE Jls Xl Qc 4 D Gils Sl bo Ge Cio Qi Che WIE GI ps OIE Qos Gilto 05 Gin Sl be QI iz Gib AJh Git Giu eli Qihis Q he he Cis Gi Gli QI ha Cis Gite Gite WE Gu Gibt GIE 1771 WG 1771 WH All module side pins are Module side pins A D are gold plated gold plated 10175 1 The Industrial Terminal System cat no 1770 T3
123. sure should be kept clean and the enclosure door should be kept closed whenever possible Periodic inspection of terminal strip connections plugs sockets and module connections for tightness should be made Loose connections may not only result in improper functioning of the controller but may also result in permanent damage to the components WARNING Remove system power before inspecting connections in the system Failure to observe this warning could result in damage to circuitry and or undesired operation with possible injury to personnel We recommend that you stock a full set of spare parts to minimize down time We also recommend that you stock at least one or 1096 of each module as a spare 5 1 Chapter 5 Maintenance and Troubleshooting Troubleshooting Use a systematic approach to troubleshooting the controller system to resolve a malfunction You can correct certain problems with hasty incomplete checks but these could result in continued downtime if the problem was only solved on an interim basis Therefore it is important that you follow a step by step procedure in discovering the problem and resolving it completely MINOR FAULT INDICATORS Minor faults are indicated by blown fuse indicators at each output module Only the output devices associated with that indicator are de energized MAJOR FAULT INDICATORS Major faults are indicated by non fuse blown indicators A major fault causes the processor and I
124. suspect module with an identical type and compatible series module Chapter 5 Maintenance and Troubleshooting Replacing A Processor Memory Module Perform the following steps to replace the memory module Figure 5 9 Figure 5 9 Processor Module Locations If S 6 9 LOT Dc D D eg Processor Chassis oe Battery uppl 6 Module 888 E Housing Processor l K Fault efa MS 2 Standby L c Low U o 4 o o Jh Memory Module Brun Processor pp y Interface Processor Module Control Slot Module Slot 10222 1 1 Turn mode select switch to the PROG position and remove power to the system power supply module 2 Loosen the two thumb screws on the right front panel and remove the panel This allows access to the memory module and processor control module 3 Remove the memory module located in the right most plastic slot 4 Ifyou will be removing and or installing memory segments on a 1772 ME or MEB memory module be sure to remove back up batteries Important Be sure to store a copy of your program prior to removing the batteries 5 13 Chapter 5
125. system or auxiliary to the 9 pin socket located below the switch group assembly Figure 3 7 Slot power supplies connect directly to the backplane If two are used they require a paralleling cable See Table 3 C for cable and power supply configurations Once it has been determined the type of power supply to be used and length of corresponding power cable needed to connect to the I O chassis plug the 9 pin connector of that power cable into the 9 pin socket on the I O chassis backplane and leave the other end of the power cable loose Later you will connect this end of the cable to the power supply When using the 1771 P7 power supply with a 1771 A3B chassis the power connection is through the 15 pin D shell connector at the top of the chassis See the Universal I O Chassis product data pub no 1771 2 49 for complete chassis information Chapter 3 Assembly and Installation Table 3 C Power Supplies and Power Cables Cable Chassis Power Supply Cable Length Cat No 1771 MB 1771 P1 P2 Chassis 1771 CL 1771 A2B 5 ft 1 55m 1771 CM 1771 A4B 1771 P3 P4 P5 No Chassis Cable needed Use 1771 CT for paralleling And power supplies 1771 P7 Chassis 1771 CP1 1771 A1 1771 A2 1772 P1 P4 3 ft 92m 1771 CK 1771 A4 1777 P2 P4 8 ft 2 45m 1771 CJ 1771 A3B 1771 P7 5 ft 1 55m 1771 CP2 1771 P1 1 ft 3m 1771 CL2 1771 PSC 1771 P3 P4 P5 No Cable needed Direct connection to
126. t number of I O modules per I O chassis that can be powered by an auxiliary power supply is determined by finding the total 5V requirements of all modules in the I O chassis This data is given in the data sheet for each module Be sure that this total does not exceed the power supply s specific output rating Table 2 C If the current requirement for the I O chassis exceeds the maximum rating of the auxiliary power supply you must change the configuration of the I O chassis You do this by removing or exchanging modules to reduce the total current requirement for the I O chassis to within the rating of the auxiliary power supply Table 2 C Power Supply Current Rating for Selected Power Supplies Output Current Power Supply Available for I O Processor 1772 P1 4 amperes 1772 P4 4 amperes Auxiliary 1771 P2 6 5 amperes 1777 P2 9 amperes series C 1777 P4 9 amperes Slot 1772 P3 3 amperes 1772 P4 8 amperes 1772 P5 8 amperes A full listing of Allen Bradley power supplies is in the Programmable Controller Products catalog pub no SD 1 7 2 29 Chapter 2 Hardware 2 30 6 5 Amp Auxiliary Power Supplies The 1771 P2 is the primary power supply recommended to power one I O chassis It provides 6 5 amperes of output current to power one I O chassis one I O adapter module and I O modules in the I O chassis rack This auxiliary power supply can be mounted on the left side plate of the I O chassis using a 1771
127. t remove power from the system power supply and perform the following steps 1 Loosen the two thumb screws on the left front panel and remove panel Figure 5 1 2 Pull the system power supply module Figure 5 2 partially out 3 Check that the power cable from system power supply module is properly seated in its processor backplane socket Figure 5 3 5 3 Chapter 5 Maintenance and Troubleshooting Figure 5 2 Processor Module Locations Processor Chassis Power Suppl Battery Mod ue Housing Processor Fault Memorv Fault Standbv Low rt Power P odule Supply ossa Processor yne pnm Slot Slot 10222 1 Figure 5 3 Svstem Power Supplv Module Side View Power Cable 0 25 AMP Fuse N 10165 I 54 Chapter 5 Maintenance and Troubleshooting 4 Check the fuses located on the side of the system power supply module figure 5 3 and the main fuse If blown replace 5 Re install the system power supply module and left front panel If the fuse blows again replace the system power supply module If the fuses are good but the DC ON indicator does not illuminate when power is applied a failure in the system power supply module memory module or processor interface module has occurred Systematically replace each module one at a time until you determine which module is faulty Important The system power supply module has protection circuitry that requires you to
128. t front panel cover 3 7 Chapter 3 Assembly and Installation LITHIUM CELL Perform the following steps for installing the lithium cell 1 Loosen thumb screws on right front panel cover and remove panel cover 2 Loosen battery housing screw and remove battery housing 3 Remove old lithium cell Lithium cells require special handling For additional information about this refer to Lithium Battery Information Application Data publication 1770 2 18 Dispose of the old lithium cell as explained in that publication Install new lithium cell and go to step 7 If old cells are alkaline remove them and continue with step 4 4 Remove center contacts Figure 3 5 5 Remove end battery contact furthest from battery housing screw and relocate in center barrier as indicated in Figure 3 6 Figure 3 6 Battery Housing with a Lithium Cell fm A Orientation Lithium Battery puri BS V i Battery Contact 10120b I 6 Install the lithium cell in left side of battery housing Figure 3 6 7 Re install battery housing and right front panel cover 3 8 1771 I O Chassis Assembly Chapter 3 Assembly and Installation All 1771 I O chassis are assembled alike regardless of size The only difference is how many field wiring
129. t the total to seven or less Each local chassis must have a 1771 AL Local I O Adapter module And as previously stated communication with the remote chassis one or more requires a 1772 SD2 Remote Distribution panel and one 1771 ASB Remote I O Adapter in each chassis Up to two local I O chassis may precede the 1772 SD2 Remote Distribution panel Connection to the preceding local I O chassis is made with a 1772 CS interconnect cable Important The 1772 SD2 must not be more than 10 cable feet from its processor module CAUTION For proper system data communications a local remote system structure with 2 local racks you must use a 1777 CA cable 3 ft 92m between the processor and the first local rack and another 1777 CA cable between the first and second local racks You must also use the 1772 C cable 3 ft 92m from the second local rack to the distribution panel I O Chassis Structure Chapter 2 Hardware An I O structure contains the following At least one I O Chassis cat no 1771 A1B A2B A3B or A4B At least one I O Adapter Module cat no 771 AL or 1771 ASB 1 I O modules And for remote systems at least one I O Scanner Distribution panel cat no 1772 SD2 and one Remote I O Adapter cat no 1771 ASB You must specify each of these units when ordering a bulletin 1771 I O chassis 1 0 Chassis The I O chassis is a single compact containment support for the I O adapter mod
130. ter 4 System Start Up Output device Output module Important The output terminal need not be connected to the output device for the indicator to function This makes the indicator useful for checking an output terminal which you later connect to a device that causes machine motion Programming Terminal Indication The industrial terminal indicates the status of each instruction displayed The status indicator of the industrial terminal has a different meaning from the on off status indicators on the I O modules The industrial terminal shows the logical or true false status of an instruction in the following manner An instruction is logically true if the condition it specifies is met If the condition is not met the instruction is logically false For example XXXX the instruction is logically true when the input device corresponding to address xxxx is on The instruction is otherwise false yyyy The instruction is true when the input device corresponding to address yyyy is off The instruction is otherwise false Using The Industrial Terminal This section discusses the procedures for checking the controller system using at Start Up the industrial terminal Hardware Indicator Comparison Procedures WARNING Remove system power before removing or installing your module in the I O chassis Failure to observe this warning could result in damage to module circuitry and or undesired operation with p
131. the 1771 ASB User s manual Publication No 1771 6 5 37 Keving Plastic keying bands are shipped with each I O chassis in the 1771 RK hardware kit These bands provide you with an easy method to ensure that only specific modules can be inserted into specific slots You should use your fingers to insert keying bands onto the backplane socket These bands are positioned between the numbers to the right of the socket on 1771 I O chassis Figure 2 12 2 19 Chapter 2 Hardware Figure 2 12 1771 I O Keying Band Location Numbers 2 4 6 Keying io Bands 12 16 18 20 22 24 26 30 Backplane 32 Socket 3 WES a RE 10170 1 The position of these keying bands may be changed to accommodate a different module type if the application changes Input Output Modules T O modules provide circuitry to interface various types of input and output devices with the processor There are five general types of I O modules Discrete Input Module Monitors the on off status of input devices connected to it Input signals can originate from limit float pressure and selector switches and from push buttons transducers or many other sensing or switching devices Discrete Output Module Controls the on off status of output devices Output signals can control various types of indicators motor starters solenoids alarms and displays An
132. this indicator is on the other indicators are no longer valid The ADAPTER FAULT indicator is normally off I O RACK FAULT Illuminates when a fault has been detected at the 1771 ASB adapter the I O chassis or the logic side of the I O modules The I O RACK FAULT is normally off Important For a full listing of the possible combinations of these indicators on off or blinking see the 1771 ASB User s manual Publication No 1771 6 5 37 5 10 Chapter 5 Maintenance and Troubleshooting Output Module Fuse Indicator The top LED indicator on an output module indicates a blown fuse on one of its outputs Figure 5 7 If a fuse blows again after you ve replaced it either the module circuitry is faulty and the module should be replaced or the load output device is drawing too much current Figure 5 7 Example of 8 point Output Module Blown Fuse Status Indicators N o 0c A WO I 10226 1 Fuses Most fuses in the controller are associated with one or more status indicators therefore a check of indicators will indirectly indicate a blown fuse As previously mentioned output module fuse s has an associated blown fuse indicator The fuses on the processor system power supply use the DC ON indicator to indicate a blown fuse When the DC ON indicator is off either the main fuse or one of the two DC fuses is blown A
133. tputs are powered down Important The master control relay is not a substitute for a disconnect to the controller It is intended for any situation where the operator must quickly de energize I O devices only When replacing any module replacing output module fuses or working on equipment within the enclosure power must be shut off to the controller system at the disconnect CAUTION It is your responsibility to install the master control relay and the emergency stop switches You must make certain that relay contacts have sufficient rating for this particular application Emergency stop switches must be located to provide quick and easy access to the operator or maintenance personnel Emergency stop switches must be wired in series WARNING Do not program emergency stop switches into the user s program Any emergency stop switch must turn off all input and output devices by de energizing the master control relay 3 41 Chapter 3 Assembly and Installation Wiring and Cabling Installation Before actually running the signal wiring refer to the wiring guidelines as outlined in sections titled Field WIring Considerations and Field Wiring Guidelines Wiring installation will be discussed relating to components WARNING To avoid injury to personnel and damage to equipment disconnect all AC and DC power to the controller before attempting any wiring installation within the enclosure Each wire which connects to an I O device
134. uld the output device fail to energize check its corresponding output module indicator This indicator aids in troubleshooting The meaning of the indicator is as follows ON The module has turned its output on supplying voltage for the terminal address being tested If the output device does not energize check the following in the order presented Wiring to the output device Device is wired to the proper I O chassis terminal Output device OFF If the output module indicator fails to illuminate perform steps 3 through 8 again If the indicator still does not illuminate replace the output module Important When an output module is replaced its output addresses should be re checked Perform steps 3 through 8 for each output address 9 10 11 Turn the processor s mode select switch to TEST position Remove the force on instruction by pressing FORCE ON CLEAR MEMORY This clears all force on instructions Turn the processor s mode select switch to PROG position 4 11 Chapter 4 System Start Up 12 Change the output address to the next address you want to test It is important to have only one rung in memory during the testing of outputs 13 Repeat steps 5 through 12 to test each output module address Checkout of Machine Motion At this point you have tested the operation of the controller connections and most of your hardware have been tested In the final procedure check machine motion o
135. ule and I O modules that make up the I O structure It has been designed to fit within the same enclosure used for the PLC 2 20 or PLC 2 30 processors Slots in the I O chassis allow for quick easy insertion of modules The left most slot accepts the PLC 2 I O adapter module 1771 AL or ASB and all slots to the right accept I O modules There are four I O chassis sizes available table 2 B Consistent chassis design permits controller expansion Figure 2 10 If a 4 slot 8 slot or 12 slot chassis is used and more I O points are needed a larger chassis 8 12 or 16 slot can be installed without rewiring User wiring is connected to terminals on wiring arms which can be removed from the smaller chassis and snapped onto the corresponding positions of the larger chassis Also when wiring arms and I O modules are placed in corresponding slots on the larger chassis the originally programmed addresses of the user I O devices are still valid and need not be changed Chapter 2 Hardware Figure 2 10 1 0 Chassis Sizes pEA FI tall i Eu Fu FI 2 es c1 E eg 4 slot 8 slot 12 slot 16 slot o o wy oo ie l Ej Cat No 1771 A1 A1B Cat
136. up uses an entire word of the image table You can use an 8 point I O module with 1 slot addressing but the module uses only eight bits of the I O image table word 8 bits in the I O image table are unused Figure A 6 Appendix A Addressing Illustration of 1 slot Addressing with 16 point I O Modules 1 slot lOGroup mr Input Terminals OR 2222222220202227 er e Po Output image table word corresponding to the I O group c1 17 16 1 4 09 0201 00 dol Unused uf Input image table word corresponding to the I O group 17 1615 1 m 02 01 00 S ea 1 slot Lo e h e 2222222272 2222227222 I O Group Output image table word corresponding to the I O group ji heleh au Input image table word 0201 00 corresponding to the I O group a7 16 15 03 02 01 00 N Unused The corresponding opposite image table word is not used when 16 point modules are used D o 10234 I A 9 Appendix A Address
137. upply must be installed AC input line connections are made to L1 and L2 LI is the high side of the AC line L2 is the low side No connection is made to the equipment ground terminal when the grounding configuration shown in Figure 3 19 is used Also see the last paragraph in section titled Incoming AC Wiring Guidelines CAUTION Be certain that the power supply is correctly jumpered for either 120V or 220 240V AC Incorrect jumpering on the terminal strip may cause improper operation or damage to the power supply 3 55 Chapter 3 Assembly and Installation Programming Terminal Installation Any of several industrial terminal systems Cat No 1770 t1 t2 T3 is the primary programming terminal for the PLC 2 20 and PLC 2 30 controllers All necessary cables for the connection of the industrial terminal to the controller are shipped standard with the 1770 T3 Industrial Terminal system For ease of cable connections sockets and connectors are configured so that they will mate only in the proper way Cable connections to the controller from the industrial terminal can be made with power applied to both the controller and industrial terminal A grounding type AC line cord is standard with most 1770 industrial terminals This line cord must only be plugged into a grounded AC outlet to minimize exposure to electrical hazard On those terminals using forced air cooling air is drawn into the industrial terminal through a filter o
138. use N Oo A DCON indicator 8 RUN indicator DIAGNOSTICS Moo o p 9 Four position mode select switch 10 Svstem power supplv module located here 10160 I Chapter 2 Hardware Processor Control Module The Processor Control Module cat no 1772 LI PLC 2 20 1772 LG PLC 2 30 occupies the middle plastic slot second slot from the right of the processor chassis Figure 2 2 This module s primary function is to provide control functions timing and interfacing with other processor modules Once inserted and properly seated into the backplane socket it is covered with a front panel which is secured to the processor chassis with two thumb screws one on top and one on bottom In addition to covering this module the front panel also covers the memory module Indicator The PROCESSOR FAULT indicator Figure 2 2 is often helpful in isolating processor malfunctions It illuminates when the logic controlling the processor scan fails This fault is usually corrected by replacing this module This indicator can be seen through the window on the front panel cover and is labeled PROC FAULT on the window Figure 2 2 Processor with the Memory Module cat no 1772 ME8 or ME16 Installed l N 5 hle amp 4ed bp Xd c 9 e a D D Processor LH Chassis L
139. wn in Figure 3 19 is used Also see the last paragraph in section titled Incoming AC Wiring Guidelines CAUTION Be certain that the power supply is correctly jumpered for either 120V or 220 240V AC Incorrect jumpering on the terminal strip may cause improper operation or damage to the power supply 1772 P4 1777 P4 POWER SUPPLY DC input 24V DC connections are made to the and terminals of the terminal strip located at the bottom front of the unit as shown in Figure 3 44 WARNING Connect wires only to the two outer terminals of the terminal strip Failure to observe this warning may result in equipment damage and or personal injury Figure 3 44 External Power Terminal Strip 24 VDC Power Supplies AC FUSE 10A SLOW BLOW 1 0 RACK POWER Soc OUO VAR aon ue Power ockets 24V DC X amp 99 99 96 CC C C C e T f S Lt ib S Ab CETUR NE RC 10217 I 3 53 Chapter 3 Assembly and Installation 1771 P2 POWER SUPPLY WARNING To avoid injury to personnel and damage to equipment disconnect all AC and DC power to the controller before attempting any wiring installation within the enclosure AC line connection is made to the terminal strip located on the front of the auxiliary power supply Figure 3 45 This auxiliary power supply is factory shipped configured for 120V AC operation Figure 3

1772-6.6.2, PLC-2/20, PLC-2/30 Programmable Controller

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