Installation and Operation Guide
Contents
1. RTD inputs exceeding the ANSI standard of 849 8 degrees C for 100 ohm platinum or 260 0 degrees C for 120 ohm nickel will cause the overrange bit to be set A maximum temperature of 849 8 degrees C for 100 ohm platinum or 260 1 degrees C for 120 ohm nickel will be returned to the PLC for any positive overrange input Similarly an input below 199 8 degrees C see Section 2 7 2 for negative numbers for 100 ohm platinum or 79 8 degrees C for 120 ohm nickel will cause the overrange bit to be set A temperature of 199 8 degrees C 63535 will be returned to the PLC for 100 ohm platinum and 79 9 degrees C 64737 for 120 ohm nickel RTDs for any negative underrange input 100 ohm Platinum RTD 40V 199 8 C 849 80 40V a Module not Underrange Accuracy Overrange Module not protected output data within bit set protected damage specification damage might occur might occur 63539 8498 Figure 6 Effect of Temperature Input on Module Performance 1 7 Resolution The module has a resolution of 0 025 of full scale For a 100 ohm platinum RTD with a maximum temperature of 849 8 degrees C the resolution will be Resolution 849 8 x 0 00025 0 212 or approximately 0 2 degrees C CTI 2452 Installation and Operation Guide 5 CTI 2452 Installation and Operation Guide CHAPTER 2 INSTALLATION The installation of the Eight Channel RTD Input Module involves the following steps 1 Planning the installation 2 Configuri2. bad a 2 ERI Connectors et EA a eine DAA a aa E a 2 2 1 2 Asynchronous Operation o ooooooooo o 2 1 2 1 Active Channels orase a A A 2 1 3 100 Ohm Platinum or 120 Ohm Nickel RTD 20 0 eee eee 3 1 4 Digital Word Map 3 1 5 RTD Input to Digital Conversion 0 0 cece eee ee eee E 4 1 6 Effect of Out of Range Input Signals 20 0 eee ee eens 5 a BA CO ig tect i te ot A A REO 5 CHAPTER Z INSTALLATION 4d Rosa 7 2 1 Planning the Installation mua i n a E ence teens 7 2 2 Calculating the I O Base Power Budget 0 cece e eee eee enn 7 223 Wnpacking the Module siise joa tose at da ogous Betas doves tit 7 2 4 Configuring the Module era ka E AA EEN AANE A RANE ATENE RAREN AA 8 2 4 1 Selecting 100 Ohm Platinum or 120 Ohm Nickel RTD Inputs 9 2 4 2 Selecting Digital Filtering etare ni i ea Ca AEE ORECR 9 2 4 3 Select Degrees Fahrenheit or Celsius 0 0 cece eee eee eee 9 2 5 Inserting the Module Into the I O Base 2 0 cece teenies 9 2 6 Wiring the Input Connectors 2 0 cece eee een n enn ene 10 DOT Wirin Guidelines ad NE olde ad add 10 2 6 2 Wiring EXamples viral o SEA ab bles 12 2 7 I O Configuration and Input Format oooooocococooo teens 13 Aa OCtalsNumM Beri Ge Husa rl tad DOE 13 2 12 Negative NUMDE S anat ns rs Shahid Hadad 13 2 7 3 Input Format 14 2 7 4 Operating the Module 0 0 cece cece E ARANA 15 28 Decoding Channe
3. the bottom rear of the case into the slot at the bottom of the base frame Push the module toward the base until it is securely seated Tighten the securing screw Refer to the SIMATIC 405 Series User s Manual for additional installation information CTI 2452 Installation and Operation Guide 9 2 6 Wiring the Input Connectors RTD input signals are accepted through a screw terminal connector block located under the wiring plate on the front of the module Consult the RTD manufacturer s recommendations for selecting the input wire type and size All GND terminals on the 2452 terminal block see Figure 9 are common to each other They are provided as a convenient termination point for cable shields All input terminals are isolated from the PLC up to 1500 VDC 2 6 1 Wiring Guidelines To avoid noise problems follow these guidelines when installing the module Use the shortest possible wires Avoid placing signal wires parallel to high energy wires If the two must meet cross them at right angles Avoid bending the wire into sharp angles Use wireways for wire routing When using shielded wires ground them only at the module end for better noise immunity Place wires so that they do not interfere with existing wiring CAUTION Tighten the screw terminals snugly Do not over tighten as damage to the connector may occur 10 CTI 2452 Installation and Operation Guide NOTE All unused channels should be shor
4. to the next selected channel following each CPU scan SP1 LD 40400 contigured as XO through X37 Vada00 contains XO through X17 X20 OUT 2000 ee then the data corresponds to channel 1 and is stored X21 OUT V2001 If X21 is on store channel 2 data in V2001 X22 OUT V2002 If X22 is on store channel 3 data in V2002 X23 OUT V2003 If X23 is on store channel 4 data in V2003 X24 OUT V2004 If X24 is on store channel 5 data in V2004 X25 OUT V2005 If X25 is on store channel 6 data in V2005 X26 OUT V2006 If X26 is on store channel 7 data in V2006 X27 OUT V2007 If X27 is on store channel 8 data in V2007 END gt End statement required in the end of every 405 user program Figure 19 Ladder Diagram Example 16 CTI 2452 Installation and Operation Guide 2 9 Checking Module Operation First turn on the base supply power If the module diagnostics detect no problems the Active LED on the front of the module will light If the Active LED does not light or goes out during operation the module has detected a failure For information on viewing failed module status refer to your SIMATICO MIU or TISOFT user manual To diagnose and correct a module failure refer to the next section on troubleshooting You must also check that the module is configured in the memory of the PLC This is important because th
5. 0 ohm platinum or 120 ohm nickel RTD for each of the eight inputs by turning each switch to the proper position The ON position corresponds to 100 ohm platinum RTD input SWITCH POSITION RTD CHANNEL VS CHANNELS TYPE SWITCHES Swi Sw1 120 ohm NICKEL 100 ohm PLATINUM 120 ohm NICKEL 100 ohm PLATINUM 120 ohm NICKEL 100 ohm PLATINUM 120 ohm NICKEL 100 ohm PLATINUM 120 ohm NICKEL 100 ohm PLATINUM 120 ohm NICKEL 100 ohm PLATINUM 120 ohm NICKEL 100 ohm PLATINUM 120 ohm NICKEL 100 ohm PLATINUM ALL DIGITAL FAHRENHEIT TEMP MILLIVOLT CHANNELS FILTERING JUMPER CELCIUS SWITCHES 1 8 JP 10 JP 11 JP 12 LEFT Filtering Enabled LEFT Degrees C LEFT Temp RIGHT Filtering Disabled RIGHT Degrees F RIGHT Millivolts Figure 8 Factory Configuration Jumper Settings 2 4 2 Selecting Digital Filtering Locate the Digital Filtering Jumper see Figure 7 To enable digital filtering set the jumper in the Dig Filter In position Since many analog input signal contain noise CTI recommends using digital filtering unless maximum response time is required 2 4 3 Select Degrees Fahrenheit or Celsius Locate the temperature scaling jumper see Figure 7 and select either degrees Fahrenheit or Celsius by positioning the jumper in the FAHRENHEIT or CELSIUS position 2 5 Inserting the Module Into the I O Base Insert the module into the I O base by tilting the top front of the module forward Hook the tab at
6. CTI 2452 EIGHT CHANNEL RTD INPUT MODULE INSTALLATION AND OPERATION GUIDE Version 1 4 CTI Part 062 00126 062 00126 245210G 051403 25 CTI 2452 Installation and Operation Guide Copyright O 2003 Control Technology Inc All rights reserved This manual is published by Control Technology Inc 5734 Middlebrook Pike Knoxville TN 37921 This manual contains references to brand and product names which are tradenames trademarks and or registered trademarks of Control Technology Inc Siemens and SIMATIC are registered trademarks of Siemens AG Other references to brand and product names are tradenames trademarks and or registered trademarks of their respective holders DOCUMENT DISCLAIMER STATEMENT Every effort has been made to ensure the accuracy of this document however errors do occasionally occur CTI provides this document on an as is basis and assumes no responsibility for direct or consequential damages resulting from the use of this document This document is provided without express or implied warranty of any kind including but not limited to the warranties of merchantablility or fitness for a particular purpose This document and the products it references are subject to change without notice If you have a comment or discover an error please call us toll free at 1 800 537 8398 CTI 2452 Installation and Operation Guide iii CTI 2452 Installation and Operation Guide PREFACE This Installation and Opera
7. ERFORMANCE OF CTI PRODUCTS OR INTERRUPTION OF BUSINESS LOSS OF USE REVENUE OR PROFIT IN NO EVENT WILL CTI BE LIABLE FOR SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS SO THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH MAY VARY FROM STATE TO STATE CTI 2452 Installation and Operation Guide 27 28 CTI 2452 Installation and Operation Guide REPAIR POLICY In the event that the Product should fail during or after the warranty period a Return Material Authorization number RMA can be requested verbally or in writing from CTI main offices Whether this equipment is in or out of warranty a Purchase Order number provided to CTI when requesting the RMA number will aid in expediting the repair process The RMA number that is issued and your Purchase Order number should be referenced on the returning equipment s shipping documentation Additionally if under warranty proof of purchase date and serial number must accompany the returned equipment The current repair and or exchange rates can be obtained by contacting CTT s main office at 1 800 537 8398 When returning any module to CTI follow proper static control precautions Keep the module away from polyethylene products polystyrene products and all other static producing mat
8. N 120 ohm NICKEL 100 ohm PLATIN 120 ohm NICKEL 100 ohm PLATIN 120 ohm NICKEL 100 ohm PLATIN 120 ohm NICKEL 100 ohm PLATIN 120 ohm NICKEL 100 ohm PLATIN ALL DIGITAL FAHRENHEIT TEMP MILLIVOLT CHANNELS FILTERING JUMPER CELCIUS SWITCHES 1 8 JP 10 JP 11 JP 12 LEFT Filtering Enabled LEFT Degrees C LEFT Temp RIGHT Filtering Disabled RIGHT Degrees F RIGHT Millivolts Figure 22 Jumper Setting Log Sheet CTI 2452 Installation and Operation Guide 23 24 CTI 2452 Installation and Operation Guide CTI 2452 Installation and Operation Guide USER NOTES 26 CTI 2452 Installation and Operation Guide LIMITED PRODUCT WARRANTY CTI warrants that this CTI Industrial Product shall be free from defects in material and workmanship for a period of one 1 year after purchase from CTI or from an authorized CTI Industrial Distributor This CTI Industrial Product will be newly manufactured from new and or serviceable used parts which are equal to new in the Product Should this CTI Industrial Product fail to be free from defects in material and workmanship at any time during this one 1 year warranty period CTI will repair or replace at its option parts or Products found to be defective and shipped prepaid by the customer to a designated CTI service location along with proof of purchase date and associated serial number Repair parts and replacement Product furnished under this warranty wil
9. d Input Format 2 7 1 Octal Numbering 405 Series I O references are numbered in octal also known as base 8 In octal the digits 8 and 9 are not used I O points are counted as usual from 0 up to 7 Since 8 and 9 are not used the next point after 7 is 10 When the count reaches 17 the next point is 20 The point following 77 is 100 2 7 2 Negative Numbers The 405 Series PLC is an unsigned integer machine and does not handle negative numbers If the 405 reads a number larger than 8499 see Section 1 5 for maximum temperatures from the 2452 it can be assumed that the 2452 is reporting a negative number Two s complement arithmetic can be used to determine the actual minus temperature assume that the measured temperature is located at V2000 Negative Temperature 65535 V2000 1 As an example Figure 14 shows a data value from channel 1 of 65496 Using the above formula 8 4 21 1 1 1 1 1 1 1 1 1 1 0 1 1 0 0 0 32 10 BIT 17 16 15 1413121110 7 6 5 4 XN 8 7 6 5 4 3 2 1 ACTIVE CHANNEL 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 BIT 37 36 35 34 33 32 31 30 27 26 25 24 23 22 21 20 XN Figure 14 Example Negative Measurement Negative Temperature 65535 65496 1 40 Degrees To assist in displaying negative numbers it can be noted that the CTI 5250 TI4 Access Module can be configured to display the 405 registers as signed integer values CTI 2452 Installation and Operation Guide 13 2 7 3 Input Format The module app
10. d Operation Guide 17 18 CTI 2452 Installation and Operation Guide CHAPTER 3 TROUBLESHOOTING If the module provides improper readings or the status indicator is not on use the following chart to determine the appropriate corrective action SYMPTOM Indicator is not lit Incorrect inputs PROBABLE CAUSE Base or PC power is off Defective module Wrong addresses for word input Wrong connections Not logged in Incorrectly calibrated Blown fuse CORRECTIVE ACTION Turn base or PC on Return the module to CTI for service Check program for correct word input addresses Trace wiring to check connections Read 1 0 configuration Return the module to CTI for calibration Return the module to CTI for calibration Figure 21 Troubleshooting Matrix When it is inconvenient to visually check the status indicator use the MIU or TISOFT Display Failed 1 0 or Show PLC Diagnostics support functions CAUTION The module fuse is not user serviceable If this fuse is blown the module has a serious component failure and should be returned to CTI for repair If after consulting the chart above you are unable to diagnose or solve the problem contact your local distributor or CTI at 1 800 537 8398 for further assistance CTI 2452 Installation and Operation Guide 19 20 CTI 2452 Installation and Operation Guide SPECIFICATIONS Channels Per Module Standard RTD Types 100 Ohm Plati
11. d the next selected channel automatically becomes active The next CPU scan triggers the active channel indicator and data for this channel and sends it to the CPU this process repeats Eight CPU scans are required to obtain data from all eight channels Thus although the module itself performs conversions asynchronously with the CPU the transmission of data from the module to the CPU is synchronous with the CPU scan This process is illustrated in the following figure 2 CTI 2452 Installation and Operation Guide BUFFER IN MODULE CPU SCAN ACTIVE CHANNEL Channel 1 Data Channel 2 Data PASSED TOP A gt Channel 3 Data u Channel 4 Data Active a l i 1 Channel 5 Data Channel Data 1 2 3 FES 4 Channel 6 Data TRA 5 Channel 7 Data T 5 6 Channel 8 Data I H 5 f Figure 3 Active Channels The module appears to the controller as 32 X inputs The module can be installed in any slot of any 405 Series base Since the 405 Series CPU supports 320 total X inputs a maximum of 10 RTD input modules 80 channels can be installed in a single 405 Series system 1 3 100 Ohm Platinum or 120 Ohm Nickel RTD Each of the module s eight channels may be configured to receive either a 100 ohm platinum RTD or a 120 ohm nickel RTD input signal Selection of 100 ohm platinum or 120 ohm nickel RTDs is made via internal switch and jumper settings see Sections 2 4 1 and 2 4 3 1 4 Digital Word Map Since the module requires a 32 bit in
12. e module will appear to be functioning regardless of whether it is communicating with the PLC To view the PLC memory configuration chart listing all slots on the base and the inputs and outputs associated with each slot refer to your SIMATICO MIU or TISOFT Programming Manual An example chart is shown in the following figure In this example the 2452 Module is inserted in slot 0 in I O base 0 Data for all channels appears in V memory location V40400 See Section 2 8 for a sample program to decode the data for individual channels If 32 point input module appears on this line then the module is registered in the PLC memory and the module is ready for operation VO MODULE DEFINITION FOR BASE 0 ADDRESS POINTS MODULE SLOT IN OUT IN OUT ID NAME O 0000A 0000A 32 00 3F 435 32 PT INPUT MOD 1 0000A 0000A 00 00 FF 435 EMPTY I 0 SLOT 2 0000A 0000A 00 00 FF 435 EMPTY 1 0 SLOT 6 0000A 0000A 00 00 wees FF 435 EMPTY VO SLOT 7 0000A OOOOA 00 00 FF 435 EMPTY VO SLOT Figure 20 Example I O Configuration Chart If the line is listed as an empty slot or shows erroneous data re check the module to ensure that it is firmly seated in the slots Generate the PLC memory configuration chart again If the line is still incorrect contact your local distributor or CTI at 1 800 537 8398 for futher assistance CTI 2452 Installation an
13. ears to the controller as 32 X inputs The module reserves points Xn through Xn 37 octal where n is the starting point number These 32 X inputs or bits are defined as shown in Figures 15 16 and 17 which also shows the most significant bit MSB and the least significant bit LSB As shown in Figure 15 the eight highest X locations Xn 30 through Xn 37 are not used by this module BlT 1716115114 13 12 111107 6 5 4 3 2 110 LSB el 37136 35 34 133132 31 30 27 26 25 24 23 22 21 20 MSB Figure 15 Unused Bits The next highest eight bits Xn 20 through Xn 27 are used by the module to indicate the active channel as shown in Figure 16 The data bits from one channel and only one channel are transferred to the CPU with each CPU scan The active channel indicators identify which channel corresponds to those data bits BIT 171161514 43 12 11 107 6 5 4 3 2 1 0 CHANNELS 8 7 6 5 4 3 2 1 o dde Figure 16 Active Channel Bits 14 CTI 2452 Installation and Operation Guide Data bits Xn 1 through Xn 16 contain the temperature data of the active channel Data bit Xn 0 is the out of range bit Data bit Xn 17 is the sign bit See Figure 17 16384 8192 4096 2048 1024 512 256 128 64 32 16 8 4 2 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0 SIGN BIT 0 1 OUT OF RANGE BIT Xn o dd Figure 17 Data Word 2 7 4 Operating the Module For example the 32 bits given i
14. erials Packing the module in its original conductive bag is the preferred way to control static problems during shipment Failure to observe static control precautions may void the warranty For additional information on static control precautions contact CTI s main office at 1 800 537 8398 CTI 2452 Installation and Operation Guide 29
15. igure 14 Example Negative Measurement 00 0 c ccc ccc ee eee eee ene 13 BIGOT US Un sed BUS a Da as BI a ts 14 Figure 16 Active Channel Bits 2 0 0 0 cece cece been eben en ene 14 Figure 17 Data Word 566255 5k he aa 15 Figure 18 Example Measurement 0 c ccc ccc cece cette ene n ene 15 Figure 19 Ladder Diagram Example oooooooocoonoconon cece cence nen ens 16 Figure 20 Example I O Configuration Chart 0 0 0 0 c ccc ccc cece ence eens 17 Figure 21 Troubleshooting Matrix 2 0 0 0 ccc ccc eee eee eee RADIE A 19 Figure 22 Jumper Setting Log Sheet 1 0 0 ccc ccc cc eee cece cece eens 23 CTI 2452 Installation and Operation Guide xi CTI 2452 Installation and Operation Guide CHAPTER 1 DESCRIPTION The 2452 Eight Channel RTD Input Module is a member of Control Technology s family of I O modules compatible with the SIMATIC 405 Series programmable controllers The Model 2452 is designed to translate 100 ohm platinum RTD input signals or 120 ohm nickel RTD input signals into equivalent digital words which are then sent to the programmable controller PLC Support for other RTD types and millivolt inputs is available through special request from the factory Call CTI at 1 800 537 8398 to determine if support is available for your special RTD 1 1 Front Panel Description ACTIVE LED CONNECTOR CONNECTOR COVER COVER LATCH al Figure 2 2452 Fron
16. l oi A EREI PALI RRS GD AREI RAT Ree RALI yes 16 2 9 Checking Module Operation 20 0 0 eee eee eee nent A 17 CHAPTERS TROUBLESHOOTING ia A gat ha oad aL barge Skee ote 19 CTI 2452 Installation and Operation Guide ix SPECIFICATIONS 04220 1 A a aes 21 JUMPER SETTINGS LOG SHEET ooo E a da ate td othe 23 USER NOTES 0 10000 A Ad ia A ao E A A A Ss 25 LIMITED PRODUCT WARRANTY Sai Dolina a ae ia e aa cnet en aa a a eee eae 27 REPAIR POLICY rastas ir ea a ls Toka aha a ds Gelato cat 29 x CTI 2452 Installation and Operation Guide TABLE OF FIGURES Figure 1 The Model 2452 RTD Input Module o ooooooooconononon e een ens v Fiure 2 22 Fron Panel aa ada 1 FeS Active Chanta A Ads 3 Figure 4 Word Map 0 AA bag Sa E ahep an OR asar be glee hi doaer AATAS 3 Figure 5 Example Change in Input Level 0 0 ccc ccc ae 4 Figure 6 Effect of Temperature Input on Module Performance 0 00 eee ee 5 Figure 7 Jumper Locations Sega dpa eia oe e nent E a a e S eee eee eeee 8 Figure 8 Factory Configuration Jumper Settings 0 0 0 0 ccc nee nee e eee eee 9 Figure 9 Screw Terminal Block Wiring 0 0c ccc nent nnn nee eee 11 Figure 10 Required Jumpering 2452 0 0 occ cece cece ence nes 11 Figure 11 Wiring Example 3 Wire RTD 0 ccc darul aeda aa eee cence n ene 12 Figure 12 Wiring Example 2 Wire RTD 0 ccc kerak eee e cece eens 12 Figure 13 Wiring Example 4 Wire RTD 0 cc ccc cee cece ence eens 12 F
17. l be on an exchange basis and will be either reconditioned or new All exchanged parts or Products become the property of CTI Should any Product or part returned to CTI hereunder be found by CTI to be without defect CTI will return such Product or part to the customer This warranty does not include repair of damage to a part or the Product resulting from failure to provide a suitable environment as specified in applicable Product specifications or damage caused by an accident disaster acts of God neglect abuse misuse transportation alterations attachments accessories supplies non CTI parts non CTI repairs or activities or to any damage whose proximate cause was utilities or utility like services or faulty installation or maintenance done by someone other than CTL Control Technology Inc reserves the right to make changes to the Product in order to improve reliability function or design in the pursuit of providing the best possible Product CTI assumes no responsibility for indirect or consequential damages resulting from the use or application of this equipment THE WARRANTY SET FORTH ABOVE IN THIS ARTICLE IS THE ONLY WARRANTY CTI GRANTS AND IT IS IN LIEU OF ANY OTHER IMPLIED OR EXPRESSED GUARANTY OR WARRANTY ON CTI PRODUCTS INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE AND IS IN LIEU OF ALL OBLIGATIONS OR LIABILITY OF CTI FOR DAMAGES IN CONNECTION WITH LOSS DELIVERY USE OR P
18. n Figure 18 might be read by the CPU during a scan Since Xn 23 contains a 1 channel 4 is active Thus the data given in bits Xn 0 through Xn 16 belongs to channel 4 Data bits 7 4 and 3 contain a 1 so the data value would be 128 16 8 152 and the temperature would be 15 2 degrees The active channel is automatically incremented to the next selected channel with each CPU scan The conversion of the analog signals to digital data is asynchronous with the CPU However the transfer of data from the module to the CPU is synchronous with the CPU scan One channel s data is transferred on each CPU scan BIT Xn BIT Xn 32 16 8 4 2 1 17 16 15 14 13 12 1110 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 ACTIVE CHANNEL 37 36 35 34 33 32 31 30 27 26 25 24 23 22 21 20 Figure 18 Example Measurement CTI 2452 Installation and Operation Guide 15 2 8 Decoding Channels Since data from all channels are multiplexed into a single word you might wish to write a program to decode the information for each channel as shown in the following figure This program decodes information from the eight channels and stores it in V memory Channel 1 is stored in V2000 channel 2 in V2001 etc This program assumes the module is configured as XO X37 X0 X17 can be read as V memory location 40400 Refer to the memory map in the 405 Series User Manual for details NOTE Only one channel is accessed per CPU scan The active channel is incremented
19. ng the module 3 Inserting the module into the base 4 Wiring the module input connector 5 Checking module operation The steps listed above are explained in detail in the following pages 2 1 Planning the Installation Planning is the first step in the installation of the module This involves calculating the I O base power budget and routing the input signal wiring to minimize noise The following sections discuss these important considerations 2 2 Calculating the VO Base Power Budget The 2452 requires 2 8 watts of 5V power from the I O base Use this figure to verify that the base power supply capacity is not exceeded 2 3 Unpacking the Module Open the shipping carton and remove the special anti static bag which contains the module CAUTION HANDLING STATIC SENSITIVE DEVICES The components on the Model 2452 module printed circuit card can be damaged by static electricity discharge To prevent this damage the module is shipped in a special anti static bag Static control precautions should be followed when removing the module from the bag when opening the module and when handling the printed circuit card during configuration After discharging any static build up remove the module from the static bag Do not discard the static bag Always use this bag for protection against static damage when the module is not inserted into the I O backplane CTI 2452 Installation and Operation Guide 7 2 4 Configuring the Module The M
20. num 120 Ohm Nickel Absolute Temp Accuracy Temperature Resolution Isolation Input Protection Input Bandwidth 3 dB point Normal Mode Rejection Filtering Time Constant Update Time Field Wiring Connector Module Power from Base Operating Temperature Storage Temperature Humidity Shipping Weight Specifications subject to change without notice CTI 2452 Installation and Operation Guide 8 eight RTD Input Channels TCR 0 003850 S S C European DIN 43760 199 89 C to 849 8 C 327 6 F to 1561 6 F TCR 0 00672 S S C 79 8 C to 260 0 C 111 6 F to 500 0 F 0 4 C 0 8 F 0 025 Full Scale 1500 VDC channel to backplane 4 000 Volts ESD 5 5 Hz digital filtering disabled 0 16 Hz single pole filter digital filtering enabled gt 45 dB 60 Hz digital filtering enabled 50 mV step input 28 mSec digital filtering disabled 1 0 Sec digital filtering enabled 1 2 mSec per channel Accepts 14 26 AWG 2 8 Watts 5 V 0 C to 60 C 32 F to 140 F 40 C to 85 C 40 F to 185 F 5 to 95 non condensing 1 Ib 0 45 Kg 22 CTI 2452 Installation and Operation Guide JUMPER SETTINGS LOG SHEET Record the configuration jumper settings on this log for future reference Make additional copies if necessary SWITCH POSITION RTD CHANNEL VS CHANNELE TYPE SWITCHES Sw1 SW1 120 ohm NICKEL 100 ohm PLATIN 120 ohm NICKEL 100 ohm PLATIN 120 ohm NICKEL 100 ohm PLATI
21. odel 2452 must be configured for 100 ohm platinum or 120 ohm nickel RTDs and digital filtering in digital filtering out mode before wiring the input connectors and inserting the module into the I O base As shipped all input channels are configured 100 ohm platinum RTDs degrees Celsius and digital filtering in see Figure 8 The jumpers and switches are available at the rear of the module see Figure REAR VIEW NOTE DRAWING NOT TO SCALE OF MODULE A F 33 ES I REAR OF MODULE ON 100 ohm PLATINUM OFF 120 ohm NICKEL sw1 EE j CHANNEL NUMBERS A JUMPER IN LEFT POSITION El gro E E ER Se DIG FILTER IN gt Emei4 DIG FILTER OUT a EN CELCIUS gt EE t FAHRENHEIT yp TEMPERATURE ds Saas a Figure 7 Jumper Locations 7 Changing the module input channel configuration involves the following steps 1 Selecting 100 ohm platinum or 120 ohm nickel RTD input mode for each channel 2 Selecting digital filtering in or digital filtering out for the module 3 Logging the configuration jumper settings for future reference Each of these steps is described in the following sections 8 CTI 2452 Installation and Operation Guide 2 4 1 Selecting 100 Ohm Platinum or 120 Ohm Nickel RTD Inputs Select the correct linearization table by locating DIP switch 1 SW1 in Figure 7 on the 2452 circuit card and select either 10
22. put word the temperature data value is placed into the lower 16 bits bits 0 17 octal for transmittal to the PLC as a V memory location As shown in the following figure bit 17 is used as a sign bit The LSB bit 0 is used to note values which are overrange e e o 32168 4 2 1 BIT 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0 SIGN TRANSLATED LSB DIGITAL WORD OVERRANGE SET to 1 8 7 6 5 4 3 2 1 ACTIVECHANNEL BIT 37 36 35 34 33 32 31 30 27 26 25 24 23 22 21 20 MSB NOT USED ACTIVE CHANNEL INDICATOR Figure 4 Word Map CTI 2452 Installation and Operation Guide 3 The first 8 bits 20 27 octal of the upper 16 bits are used for channel status and are read as X values Bits 30 37 octal are not used Sections 2 7 and 2 8 describe the digital word in more detail 1 5 RTD Input to Digital Conversion The following equations may be used to calculate the digital word in decimal format which will result from a particular RTD input RTD Mode Digital Word bits 0 17 Degrees X 10 As an example the following figure illustrates the effects of a change in input level going from 3 2 degrees to 102 4 degrees in the RTD Input Mode LSB ds OOOO papada e e 32168 4 2 LSB aser COMBAOO OD ROBADO e o o 32168 4 2 i Figure 5 Example Change in Input Level 4 CTI 2452 Installation and Operation Guide 1 6 Effect of Out of Range Input Signals
23. t Panel 1 1 1 Active LED The Active LED will be illuminated when the module is functioning normally If the Active LED is not lit refer to Chapter 3 for troubleshooting type CTI 2452 Installation and Operation Guide 1 1 1 2 Connector Cover The connector cover is a plastic plate on the front of the 2452 The connector cover conceals the connector and cabling The connector cover also protects the temperature sensing components from external drafts To remove the cover press up on the latch at the bottom of the cover and pull the cover forward To reinstall the cover place the tab at the top of the cover into the slot on the module case Push forward until the latch seats into place 1 1 3 Connector The connector provides screw terminals for attaching RTD wires to the 2452 See Section 2 6 for wiring details 1 2 Asynchronous Operation The module operates asynchronously with the CPU That is the update times of the CPU and module do not occur simultaneously The module converts all selected RTD inputs in one module update which is less than 3 0 milliseconds per selected channel and stores digital information in a buffer 1 2 1 Active Channels One of the channels is considered to be active during each CPU scan On any given CPU scan both a control bit describing which channel is active and the information for the active channel is transferred from the module to the CPU Following the transfer the channel is deactivated an
24. ted from the 11 to the GND terminals to prevent saturation of the input amplifier Failure to do so will result in erroneous readings on adjacent channels 1 O F T11 2i l1 12 310 40 c 1 5 2 r 6 O 11 TO 31 maA 9 y I1 Olla r 1 6 c 11 12 15 13 CND opg n 15 16 12 16 11 7 17 r 81 EA 19 OE n 22010 8 12 Figure 9 Screw Terminal Block Figure 10 Required Jumpering Wiring 2452 CTI 2452 Installation and Operation Guide 11 2 6 2 Wiring Examples The following example demonstrates hooking up two 3 wire RTDs to channels 1 and 2 of the 2452 The SHIELD gt GND y J HH O 3 WIRE Figure 11 Wiring Example 3 Wire RTD shields of both RTDs are connected to terminal 3 GND terminal The 2452 is designed to accommodate 3 wire RTDs However using the following wiring diagrams 2 R SHIELD gt J o 2 WIRE Figure 12 Wiring Example 2 Wire RTD and 4 wire RTDs may also be used gt NC oo I rp NC SHIELD gt o_o 5 _ GND Figure 13 Wiring Example 4 Wire RTD COSCO 4 WIRE 12 CTI 2452 Installation and Operation Guide 2 7 I O Configuration an
25. tion Guide provides installation and operation instructions for the CTI 2452 Eight Channel RTD Input Module for SIMATICO 405 Series programmable controllers We assume you are familiar with the operation of SIMATICO 405 Series programmable controllers Refer to the appropriate SIMATICO user documentation for specific information on the SIMATICO 405 Series programmable controllers and I O modules This Installation and Operation Guide is organized as follows Chapter 1 provides a description of the module Chapter 2 covers installation and wiring Chapter 3 is a guide to troubleshooting Figure 1 The Model 2452 RTD Input Module CTI 2452 Installation and Operation Guide v vi CTI 2452 Installation and Operation Guide USAGE CONVENTIONS NOTE Notes alert the user to special features or procedures CAUTION Cautions alert the user to procedures which could damage equipment WARNING Warnings alert the user to procedures which could damage equipment and endanger the user CTI 2452 Installation and Operation Guide vii viii CTI 2452 Installation and Operation Guide TABLE OF CONTENTS PREFACE A e e A e e had si v USAGE CONVENTIONS reberen a eb etd E A NS vii TABEE OF FIGURES 20 A a a DA xi CHAPTER L DESCRIPTION 4 ita Ai 1 LT From Panel Descriptiony wii A A ees eked 1 1 1 1 Active LED vis esis ek ii a 1 LT 2 Connector Cover jit fcuk eds aint Sad booth hands adit Saas fects oR
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