AB 1771 DE Product Data - Artisan Technology Group
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1. Product Data Absolute Encoder Module The absolute encoder module can control outputs within a one count resolution turn an output on at position 065 and off at position 066 if shaft speed does not exceed a certain limit This speed limit depends on the number of outputs and the number of counts on the encoder It can be found from S K N where S maximum shaft speed for one count resolution K a constant and N number of counts on the encoder The value of K depends on whether you want to express shaft speed in revolutions per second rps or revolutions per minute rpm If you control Then K OR K for rps for rpm 8 outputs 300 000 6 outputs 389 610 4 outputs 540 540 2 outputs 845 070 For example if you control eight outputs with a 0 to 359 count encoder and the encoder shaft speed is given in revolutions per minute the equation 18 300 000 360 833 rpm The maximum encoder shaft speed at which you can control eight outputs within a one count resolution is 833 rpm Refer to the User s Manual for the absolute encoder module publication 1771 6 5 32 for details on operating the encoder at its maximum speed 11 Product Data Absolute Encoder Module Specifications 12 Module Location e Any 1771 I O chassis any 2 slot I O group Number of Inputs e Up to 12 encoder input bits per module Encoder Formats e BCD e Natural binary e Standard Gray Digital Resolution e2. Upto one part in 4 095 with natural binary and standard Gray encoders e Up to one part in 999 with BCD encoders High true Logic e From totem pole open collector or differential line drivers e Can select direction of rotation of increasing position for Gray code encoders Input Voltage Range and Logic State Logic 1 2 4V to 5 0V DC Logic 0 0 0V to 0 6V DC Input Current per Channel sunk by encoder device e 11 mA for single ended drivers e 18 mA for differential drivers Maximum Input Frequency e 50 KHz Encoder Data Settling Time e 100ns New Position Throughput Time e 200us New Write data Throughput Time e 3ms Input Power Supply e 45V DC 0 25V total output voltage tolerance includes line regulation load regulation drift and ripple Current Requirement maximum e 300 mA e Number of Outputs e 8 Output Current Rating e 2A sourced per output no derating with all outputs on VA Rating e 48W per output e 384W per module Surge Rating e 4A for 10ms Input and Output Isolation e 1500V RMS Output Power Supply e Selectable 5 to 24V DC Backplane Current e 800 mA at 5V DC Output Fuses e rectifier fuses Littelfuse 322003 Buss GBB003 or equivalent Environmental Conditions e Operating Temperature 0 to 60 C 32 to 140 F e Storage Temperature 40 to 85 40 to 185 e Relative Humidity 5 to 9596 without condensation Keying for slot 0 only e Betw
3. gt M Looking for more information AY Artisan Scientific Visit us on the web at http www artisan scientific com for more information QUALITY INSTRUMENTATION GUARANTEED Price Quotations Drivers Technical Specifications Manuals and Documentation Artisan Scientific is Your Source for Quality New and Certified Used Pre owned Equipment Tens of Thousands of In Stock Items Fast Shipping and Delivery Equipment Demos Hundreds of Manufacturers Supported Leasing Monthly Rentals Consignment Service Center Repairs InstraView Remote Inspection Experienced Engineers and Technicians on staff in our Remotely inspect equipment before purchasing with our State of the art Full Service In House Service Center Facility Innovative InstraView website at http www instraview com We buy used equipment We also offer credit for Buy Backs and Trade Ins Sell your excess underutilized and idle used equipment Contact one of our Customer Service Representatives todayl Talk to a live person 888 88 SOURCE 888 887 6872 Contact us by email sales artisan scientific com Visit our website http www artisan scientific com Description ALLEN BRADLEY Absolute Encoder Module Cat No 1771 DE Product Data The Absolute Encoder Module cat 1771 DE 15 an intelligent module that provides high speed response to machine position independently of the programmable controller scan The module is usually used when
4. the following features are required e absolute position feedback high speed position response based on encoder values e immunity to loss of position from power loss or power interruptions The absolute encoder module can monitor the position of an absolute encoder that has up to 12 bits of resolution Product Data Absolute Encoder Module e control up to eight high current outputs based on comparisons between encoder position and your preset values Product Data Absolute Encoder Module a provide throughput of all eight outputs in less than 200 uS e communicate with the programmable controller through block transfers report the position of an absolute encoder and status of outputs to the programmable controller In addition the module can switch 2A DC per output with no derating when all outputs are on allowing 16A continuous per module Figure 1 shows the major hardware components on the module 1 Absolute Encoder Module cat no 1771 DE Modula 1 0 Label Ex Latus Indicators Protective Cover Field Wiring Arm Terminal 1 0 Label You can use the absolute encoder module with any Allen Bradley programmable controller that uses block transfer programming in local and remote 1771 I O systems Product Data Absolute Encoder Module Feature Selection Some Allen Bradley programmable controllers compatible with the module are Mini PLC 2 cat 1772 LN3 PLC 2 20 c
5. 14 382 2000 28 Watson Road 5X1 Telex 43 11 016 Hong Kong Canada FAX 1 414 382 2400 Tel 852 887 4788 Tel 1 519 623 1810 Telex 780 64347 FAX 1 519 623 8930 FAX 852 510 9436 PN 955096 77 Printed in USA gt M Looking for more information AY Artisan Scientific Visit us on the web at http www artisan scientific com for more information QUALITY INSTRUMENTATION GUARANTEED Price Quotations Drivers Technical Specifications Manuals and Documentation Artisan Scientific is Your Source for Quality New and Certified Used Pre owned Equipment Tens of Thousands of In Stock Items Fast Shipping and Delivery Equipment Demos Hundreds of Manufacturers Supported Leasing Monthly Rentals Consignment Service Center Repairs InstraView Remote Inspection Experienced Engineers and Technicians on staff in our Remotely inspect equipment before purchasing with our State of the art Full Service In House Service Center Facility Innovative InstraView website at http www instraview com We buy used equipment We also offer credit for Buy Backs and Trade Ins Sell your excess underutilized and idle used equipment Contact one of our Customer Service Representatives todayl Talk to a live person 888 88 SOURCE 888 887 6872 Contact us by email sales artisan scientific com Visit our website http www artisan scientific com
6. O Its format is as follows e Bits 0 through 2 are the comparison bits for output 0 preset A greater than less than or equal to e Bits 3 through 5 are the comparison bits for output 0 preset B e Bit 6 is the zero transition ZT bit Set this bit when you want an output energized during a transition through 0 e Bit 7 is the output enable OE bit This bit is examined along with comparison bits 0 through 5 and the absolute position of the encoder in turning on a module s output Although comparisons for both presets may be true if you don t set this bit the output is not turned on The upper byte of control word 1 is associated with output 1 The format of this byte is similar to the format of the lower byte Bits 10 through 12 are the comparison bits for output 1 preset A e Bits 13 through 15 are the comparison bits for output 1 preset B e Bit 1615 the ZT bit e Bit 17 is the OE bit The remaining control words and their corresponding outputs are word 6 outputs 2 and 3 word 11 outputs 4 and 5 word 16 outputs 6 and 7 Preset Words Preset words define the values you choose for turn on and turn off points of the corresponding output You program them in BCD Each block of four preset words is associated with two outputs and is identical in format to that for outputs 0 and 1 word 2 preset A for output 0 word 3 preset B for output 0 word 4 preset A for output word 5 preset B for outpu
7. at no 1772 LP2 a PLC 2 30 cat 1772 LP3 Mini PLC 2 15 cat 1772 LV Mini PLC 2 05 cat 1772 LS LSP a PLC 3 cat 1775 11 L2 You can use Allen Bradley absolute encoders that use up to 12 bits with the absolute encoder module Allen Bradley encoders with the following bulletin numbers are compatible with the absolute encoder module a Bulletin 845A Bulletin 845B Bulletin 845C The module is also compatible with absolute encoders that have the following specifications e single ended or differential output e TIT compatibility output drivers e capability of sinking 11 mA single ended or 18 mA differential per channel natural binary BCD or standard Gray code format We recommend the use of differential output encoders because of their higher immunity to noise than single ended output encoders By setting configuration plugs on the left board of the absolute encoder module you can select e BCD natural binary or standard Gray encoder format e single ended or differential encoder output signals e direction of shaft rotation that corresponds to increments in the absolute position of Gray encoders A configuration plug on the right board lets you select the state of the outputs if the module loses input power The plug allows the outputs to s turn off remain in their state at loss of input power Status Indicators Power Supplies Terminal Identificatio
8. een 2 and 4 e Between 26 and 28 ALLEN BRADLEY XI ROCKWELL INTERNATIONAL COMPANY With offices in major cities worldwide WORLD EUROPE MIDDLE HEADQUARTERS EAST AFRICA Allen Bradley HEADQUARTERS 1201 South Second Street Allen Bradley Europe Milwaukee WI 53204 USA Amsterdamseweg 15 Tel 1 414 382 2000 1422 AC Uithoorn Telex 43 11 016 The Netherlands FAX 1 414 382 4444 Tel 31 2975 43500 Telex 844 18042 FAX 31 2975 60222 Publication 1771 2 80 November 1985 As a subsidiary of Rockwell International one of the world s largest technology companies Allen Bradley meets today s challenges of industrial automation with over 85 years of practical plant floor experience More than 11 000 employees throughout the world design manufacture and apply a wide range of control and automation products and supporting services to help our customers continuously improve quality productivity and time to market These products and services not only control individual machines but integrate the manufacturing process while providing access to vital plant floor data that can be used to support decision making throughout the enterprise ASIA PACIFIC CANADA LATIN AMERICA HEADQUARTERS HEADQUARTERS HEADQUARTERS Allen Bradley Hong Kong Allen Bradley Canada Allen Bradley Limited Limited 1201 South Second Street Room 1006 Block B Sea 135 Dundas Street Milwaukee WI 53204 USA View Estate Cambridge Ontario NIR Tel 1 4
9. it 3 Common Not Used Bit 4 Output Supply 5 to 24V DC Bit 4 Common Output 4 Bit 5 Output 5 Bit 5 Common Output 6 Bit 6 Output 7 Bit 6 Common Output Common 5 to 24V DC For Outputs Bit 7 Output Common 5 to 24V DC 4 7 Bit 7 Common Not Used Bit 8 Bit 10 Bit 8 Common Bit 10 Common Bit 9 Bit 11 Bit 9 Bit 11 Common input Supply Input Common 5V DC 5V DC 12832 Product Data Absolute Encoder Module Cabling We recommend the following Belden cable or its equivalent to connect the encoder to the module Use extra twisted pair s of wire to connect power to the encoder Encoder Bits No of twisted pairs Belden Cable No in cable 20 AWG 8 9 9775 9875 10 11 9976 12 9776 9877 12 15 9777 9879 Module Processor The absolute encoder module and the processor communicate through Communication block transfer programming Block transfer write Data You write data to the module in blocks You can write 5 10 15 or 20 words in one block transfer operation Each block 15 associated with two outputs and is identical to the other blocks in format words 1 5 outputs 0 and 1 words 6 10 outputs 2 and 3 words 11 15 outputs 4 and 5 words 16 20 outputs 6 and 7 The first word of each block is a control word The last four words are preset words The format of the write data words and control word 1 15 shown in figure 3 Product Data Absolute Encoder Module 3 Format of Bl
10. n Product Data Absolute Encoder Module The module has 10 LED indicators figure 1 e Fight output status indicators one per output light when the corresponding output circuitry is energized a One green ACTIVE indicator lights when the module is powered and functioning e One red FAULT indicator lights when the module detects a fault and momentarily lights at power up You need a minimum of two external power supplies one to power input circuitry and one to power output devices The input circuits of the module require a maximum of 300 mA from a 5V DC supply You can also use this 5V supply to power the encoder To supply power to the eight outputs you need at least one 5 to 24V DC power supply If you need two different load supply voltages to power your outputs you can connect an additional 5 to 24V DC supply to the module The encoder signal lines and the power supply for the input circuits are connected to the terminals on the left board and terminals 17 through 21 on the right board The output power supply ies and output devices are connected to terminals 1 through 15 of the right board figure 2 Product Data Absolute Encoder Module 2 Terminal Identification Bit 0 Output Supply 5 to 24V DC Bit 0 Common Output 0 Bit 1 Output 1 Bit 1 Common Output 2 Bit 2 Output 3 Bit 2 Common Bit 3 For Outputs Output Common 5 to 24V DC 0 3 Output Common 5 to 24V DC B
11. ock transfer write Data 17 16 15 14 13 12 11 10 7 Control Word for Outputs 0 and 1 Cau de 5 tt tT LL EL LL LL J Preset 08 Preset 1 5 EF LL IL 1 Preset 18 gt 2 gt foroutouts2anda Ty E tT eT EL ET BE erento o Lr LLL Preset 3a A Write data words 10 Uer ge ll ke ae n ejz gt lt gt lt 2 gt lt Preset 4A tT tT tT tT TT TT IL Preset 48 tT tT tT tT tT tT Preset 5a TT 2 gt lt gt 2 gt lt gt lt for Outputs 6 and 7 LL LLL tT Preset ea pt tet TE 1 Preset Ease EL Preset 7A Preset 7B COM for COM for COM for COM for Preset1B Preset 1A PresetOB Preset 0A n eee eezr 2 lt 2 lt gt lt Output Enable Bit ZT Zero Transition Bit COM Comparison Bits Word 1 B Format of Control Word 1 12839 You can send a maximum of 20 words four blocks of five words in one block transfer operation The number of words you send to the module determines how many outputs it controls Product Data Absolute Encoder Module Control Words The lower byte of control word 1 is associated with output
12. t 1 Product Data Absolute Encoder Module Block transfer read Data The processor reads data from the module and transfers it to its data table in two read data words figure 4 The upper byte of word indicates the status of the eight outputs The module sets each bit when the corresponding output is turned on e The format of the lower byte of word by bit is Bit 7 is the loss of input power bit It is set when input power is lost it is reset when power is restored and bit 6 is reset Bit 6 is the write data valid bit It is set at power up and when the processor changes from the program to run mode it is reset when the module receives valid data in a block transfer write operation Bit 5 1s unused Bit 4 is the non BCD preset flag It is set when any preset is in non BCD format Bits 3 through 0 make up a code that indicates which preset is not in BCD format Refer to the User s Manual of the module publication number 1771 6 5 32 for details of these bits e Word 2 indicates the current absolute position of the encoder in BCD 4 Format of Block Transfer Read Data p 16 15 14 13 12 10 or 06 05 04 03 02 0 o0 wordt T5 TT Y _ Code indicating which preset is in non BCD format Bit em Non BCD preset flag Output 5 Unused Output 4 Write data valid Output 3 Loss of input power Output 2 Output 1 Output 0 13070 10 Maximum Encoder Shaft Speed
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