CTI 2451 EIGHT CHANNEL THERMOCOUPLE INPUT
Contents
1. All unused channels should be shorted from the to the terminals to prevent saturation of the input amplifier Failure to do so will result in erroneous readings on adjacent channels SHIELD Figure 11 Thermocouple Wiring Example The shields of both thermocouples are connected to terminal 3 GND connector 10 CTI 2451 Installation and Operation Guide The following example demonstrates hooking up two millivolt inputs to channels and 2 of the 2451 NOTE The terminal incorporates cold junction compensation and is not used on millivolt inputs NOTE All unused channels should be shorted from the to the terminals to prevent saturation of the input amplifier Failure to do so will result in erroneous readings on adjacent channels Va os5mv 7 E 0 55 mv f ES y Figure 12 Millivolt Wiring Example CTI 2451 Installation and Operation Guide 11 2 7 I O Configuration and Input Format 2 7 1 Octal Numbering Series 405 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 Input Format T2. 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 X0 X37 X0 X17 can be read as V memory location 40400 Refer to the memory map in the Series 405 User Manual for details NOTE Only one channel is accessed per CPU scan The active channel is incremented to the next selected channel following each CPU scan SP1 ALWAYS ON 7 gata word Assumes module is configured as XO through X37 X20 V40400 contains X0 through X17 our ds X21 OUT If X21 is on store channel 2 data in V2001 X22 OUT If X22 is on store channel 3 data in V2002 X23 OUT If X23 is on store channel 4 data in V2003 X24 OUT If X24 is on store channel 5 data in V2004 X25 OUT If X25 is on store channel 6 data in V2005 X26 OUT If X26 is on store channel 7 data in V2006 X27 OUT If X27 is on store channel 8 data in V2007 END End statement required in the end of every 405 user program Figure 17 Ladder Diagram Example CTI 2451 Installation and Operation Guide 15 2 9 Checking Module Operation First turn on the base supply power If the module diagnostics detect no problems the status indicator on the front of the module will light If the status indicator does not light or goes out during operation the module has detected a failure For information on viewing fail
3. carton and remove the special anti static bag which contains the module After discharging any static build up remove the module from the anti static bag Do not discard the anti static bag You will need it for the following configuration procedure CTI 2451 Installation and Operation Guide 5 2 4 Configuring the Module The Model 2451 must be configured for Type J or Type K non grounded thermocouples or millivolt range and digital filtering no filtering mode before wiring the input connectors and inserting the module into the I O base As shipped all input channels are configured Type J thermocouples degrees Celsius and digital filtering enabled see Figure 8 Changing the module input channel configuration involves the following steps 1 Select millivolt or temperature input 2 Selecting Type J or Type K thermocouple input mode for each channel 3 Selecting digital filtering or no filtering for the module 4 Logging the configuration jumper settings for future reference Each of these steps is described in the following sections CAUTION DO NOT attempt to calibrate COLD JUNCTION Foe COMPENSATION umper in JUMPERS right position CH1 Type J Jp 2 esi CH1 Type K 3 e 6 CH2 Type J
4. 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 conversion asynchronously with the CPU the transmission of data from the module to the CPU is asynchronous with the CPU scan This process is illustrated in the following figure Buffer in module CPU Scan Active Channel Channel 1 Data Channel 2 Data Channel 3 Data Passed to CPU Channel 4 Data Channel 5 Data Active Channel 6 Data Channel Data Channel 7 Data Channel 8 Data A meet tt eee 000 ACI 00 JD AO ane Figure 2 Active Channels CTI 2451 Installation and Operation Guide 1 The module appears to the controller as 32 X inputs The module can be installed in any slot of any Series 405 base Since the Series 405 CPU supports 320 total X inputs a maximum of 10 thermocouple input modules 80 channels can be installed in a single Series 405 system 1 2 Type J or Type K Thermocouple Each of the module s eight channels may be configured to receive either a Type J Thermocouple or a Type K non grounded thermocouple input signal The module may also be configured to receive DC voltage signals ranging from 0 to 55 millivolts Selection of Type J or Type K thermocouples or millivolts are made via internal switch and jumper settings see Sections 2 4 1 and 2 4 3 1 3 Digita
5. the ENABLED position Since many analog input signals contain noise CTI recommends using digital filtering unless maximum response time is required CHANNEL THERMOCOUPLE SWITCH POSITION THERMOCOUPLE NUMBER COMPENSATION vs TYPE SWITCHES JUMPER CHANNEL SW1 POSITION sw J K OFF ON 1 JP 1 JP 2 1 K J 2 JP 3 JP 4 2 K J 3 JP5 JP 6 3 K J 4 JP 7 JP 8 4 K J 5 JP 9 JP 10 5 K J 6 JP 11 JP 12 6 K J 7 JP 13 JP 14 7 K J 8 JP 15 JP 16 8 K J ALL DIGITAL FAHRENHEIT TEMP CHANNELS FILTERING CELSIUS MILLIVOLT JUMPER SELECT SWITCHES 1 8 JP 34 JP 35 JP 36 LEFT Filtering Disabled LEFT Degrees F LEFT Millivolts RIGHT Filtering Enabled RIGHT Degrees C RIGHT Temp Figure 9 Factory Configuration Jumper Settings CTI 2451 Installation and Operation Guide 7 2 4 4 Select Degrees Fahrenheit or Celsius Locate the temperature scaling jumper JP35 on the left hand side of the module see Figure 8 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 carefully pushing the module into the slot When the module is fully seated in the slot tighten the captive screws at the top and bottom to hold the module in place To remove the module from the I O base loosen the captive screws then remove the module from the I O base Be careful not to d
6. 000A 00 00 BR pato cede 435 EMPTY I O SLOT AA 0000A 0000A 00 00 PE its 435 EMPTY I O SLOT BASES mit AA ies As OB accor female 435 O BASE CRU Bit Petes tee oe Vel Oe hoe e lead Ab te eT Qe eerie tis atl 435 CPU AND P S PS ostendo cme ets ye pwede oa wel eee ee ees ee OL ies 435 CPU AND P S FROM P C 435 RUN EXIT F1 READDK F3 WRITDK F4 READPC F5 WRITPC F6 AU MAN F7 CLRBS F8 16 CTI 2451 Installation and Operation Guide 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 2451 Installation and Operation Guide 17 18 CTI 2451 Installation and Operation Guide CHAPTER 3 TROUBLESHOOTING SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION Indicator is not lit Base or PC power is off Turn base or PC on Defective module Return the module to CTI for service Incorrect inputs Wrong addresses for word input Check program for correct word input addresses Wrong connections Trace wiring to check connections Not logged in Read I O configuration Incorrectly calibrated Return the module to CTI for recalibration Blown fuse Return the module to CTI for service Troubleshooting Matrix CAUTION The mod
7. 245110G 051403 CTI 2451 EIGHT CHANNEL THERMOCOUPLE INPUT MODULE INSTALLATION AND OPERATION GUIDE Version 1 2 CTI Part 062 00111 25 Copyright 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 merchantiblility 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 li CTI 2451 Installation and Operation Guide PREFACE This Installation and Operation Guide provides installation and operation instructions for the CTI 2451 Eight Channel Ther
8. E E E cnet ene ees 2 1 4 Thermocouple Input to Digital Conversion 00 cece eee ee eee 3 1 5 Effect of Out of Range Input Signals 20 2 eee eens 3 TG RESORTE a EE a E ld ce 4 CHAPTER 2 INSTALLATION 5 2 1 Planning the Installation o oo oocooococoococoro eee een een enn 5 2 2 Calculating the I O Base Power Budget 0 eee eee enn ene 3 2 3 Unpacking the Module 20 cece eee eee een AEEA ene 5 2 4 Contig uring the Modulene rererere ta 6 2 4 1 Select Millivolt or Temperature Input 0 0 00 7 2 4 2 Selecting Type J or Type K Thermocouple Inputs 7 2 4 3 Selecting Digital Filtering e turore i e eR a ccc cece cence 7 2 4 4 Select Degrees Fahrenheit or Celsius 0 00 e cece eee eee 8 2 5 Inserting the Module into the I O Base 0 cc eee eee eens 8 2 6 Wiring the Input Connectors 2 0 eee ee eee AORERE 8 26 1 Waiting Guidelines vai 26 a Saale ate ele Ada 9 26 2 Wiis Bxamplesi amara a tobe kM Oo CS EERE hoa Oe beto 10 2 7 I O Configuration and Input Format 2 0 cece eee eens 12 27 A Octal Numbering is tie ates AN a AA lh 12 2 kA Input Format isis sobe aa oda Se bebe dolia ole ne boas 12 2 7 3 Operating the Module na erodes adeir miea i e ences 13 2 8 Decoding Chameleon 14 2 9 Checking Module Operation 2 0 cece a ee eee aka n ene 15 CHAPTER 3 TROUBEESHOOTING entidad A tude ead data ge we
9. ORTH 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 PERFORMANCE 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 2451 Installation and Operation Guide 25 26 CTI 2451 Installation and Operation Guide REPAIR POLICY In the event that the Product should fail during or after the warranty period a Return Material Authorization RMA number 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 purc
10. Xn BIT Xn 16384 8192 4096 2048 1024 512 256 128 64 32 16 4 2 1 7 5 192 9 7 Jo s Jo 2 10 9 2 5 o Figure 15 Data Word 2 7 3 Operating the Module For example the 32 bits given in Figure 15 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 belong 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 or millivolts range would be 1 52 millivolts 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 That is the selected channels are presented to the CPU one at a time one per CPU scan in a cyclic fashion 32 16 BIT Xn i i 8 4 oJo o o o o oJo 1 o o 1 o o o 3 2 0 17 16 15 14 13 12 11 10 7 6 5 4 ACTIVE CHANNEL 8 7 6 5 4 3 2 1 oJo o o o o ofofolo fo of1fofofo BIT Xn 14 37 36 35 34 33 32 31 30 27 26 25 24 23 22 21 20 Figure 16 Example Measurement CTI 2451 Installation and Operation Guide 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
11. al 17 SPECIFICATIONS isc S404 Si ee ed ee a a ad add eed eae eae 19 LIMITED PRODUCT WARRANTY unio AA gard anand a ake ge RATS eae 23 REPAIR POLICY io or cca titer ttle 2b ated AAA Aste 25 CTI 2451 Installation and Operation Guide vii CTI 2451 Installation and Operation Guide TABLE OF FIGURES Figure 1 The Model 2451 Thermocouple Input Module 00 0 c ccc cette nee 111 Fiure r Active CINTES a AEN R eA RA a E A 1 BRiStire 3 Word Map A A aa 2 Figure 4 Example Change in Input Level nuunuununaanaaaa aana 3 Figure 5 Effect of Temperature Input on Module Performance 0 0c eee 3 Figure 6 Effect of Voltage Input on Module Performance 00 0 ene eee 4 Figure 7 Input Resolution 0 0 0 0 ccc nnn nee nnn eee eee ee eeee 4 Figure 8 Jumper Locations 00 0 0c nnn nnn tenet eee ia aA 6 Figure 9 Factory Configuration Jumper Settings 0 0 0 0 ccc eee nee eens 7 Figure 10 Screw Terminal Block Wiring 0 00 naana 8 Figure 11 Thermocouple Wiring Example 0 0 0c nent eee ene eee 10 Figure 12 Millivolt Wiring Example S reaperanta aitaa enn nent ene eeeeee 11 Figure 3 Unused Bits A Bhd hd hd ANAN SA Ai 12 Figure 14 Active Channel Bits 2 0 0 ccc cece cece eee eens 12 Ligure ERE 710 A 00 0 AOT IEE a a E E 13 Figure 16 Example Measurement ooo 13 Figure 17 Ladder Diagram Example oooo oo oocoonoconon cece eee eee nes 14 CTI 2451 Installation and Operation Guide ix CTI 2451 Installation and Operation Gui
12. amage the connector at the back of the module when inserting or removing the module 2 6 Wiring the Input Connectors Thermocouple input signals are accepted through a screw terminal connector block located on the front of the module Consult the thermocouple manufacturer s recommendations for selecting the input wire N Azo VIONTO i jj aroaro XIOOIO PIO Figure 10 Screw Terminal Block Wiring type and size 8 CTI 2451 Installation and Operation Guide All GND terminals on the 2451 terminal block see Figure 10 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 1500VDC CAUTION Only non grounded thermocouples are to be used 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 wire CTI 2451 Installation and Operation Guide 9 2 6 2 Wiring Examples The following example demonstrates hooking up two thermocouples to channels 1 and 2 of the 2451 NOTE
13. de CHAPTER 1 DESCRIPTION The Model 2451 Eight Channel Thermocouple Input Module is a member of Control Technology s family of I O modules compatible with the SIMATIC 405 Series programmable controllers The Model 2451 is designed to translate Type J thermocouples Type K thermocouples and millivolt input signals into equivalent digital words which are then sent to the programmable controller PLC The Model 2451 Thermocouple Input Module features built in cold junction compensation for each thermocouple input Support for other thermocouple types is available through special request from the factory Call CTI at 1 800 537 8398 to determine if support is available for your special thermocouple type 1 1 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 thermocouple inputs in one module update which is less than 3 0 milliseconds per selected channel and stores the digital information in a buffer 1 1 1 Active Channels One of the channels is considered to be active during each CPU scan On any given CPU scan both an indicator 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 and the next selected channel automatically becomes active The next CPU scan triggers the active channel
14. ed module status refer to your SIMATIC TISOFT user manual To diagnose and correct a module failure refer to troubleshooting You must also check that the module is configured in the memory of the PLC This is important because the 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 or outputs associated with each slot refer to your SIMATIC TISOFT Programming Manual An example chart is shown in the following figure In this example the 2451 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 TO MODULE DEFINITION FOR BASE 0 ADDRESS POINTS MODULE SLOT IN OUT IN OUT ID NAME A 0000A 0000A 32 00 SE ea 435 32 PT INPUT MOD Mi od or 0000A 0000A 00 00 BE cod teeta 435 EMPTY I O SLOT Daru aise 0000A 0000A 00 00 BR oss 435 EMPTY I O SLOT Dro aoe 0000A 0000A 00 00 FP sen modes 435 EMPTY I O SLOT Ee 0000A 0000A 00 00 A 435 EMPTY I O SLOT tego 0000A 0000A 00 00 BE ate fees 435 EMPTY I O SLOT Oui 0000A 0
15. hase date and serial number must accompany the returned equipment The current repair and or exchange rates can be obtained by contacting CTI 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 materials 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 2451 Installation and Operation Guide 27
16. he module appears to the controller as 32 X inputs To allow the automatic I O configuration to reserve points XO through X37 for the module for a total of 32 points install the module in the first slot of the first base 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 Figure 13 which also shows the most significant bit MSB and the least significant bit LSB As shown in Figure 13 the eight highest X locations Xn 30 through Xn 37 are not used by this 5 es 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0 LSB Bit 37 36 35 34 33 32 31 30 27 26 25 24 23 22 21 20 MSB Figure 13 Unused Bits module The next highest eight bits Xn 20 through Xn 27 are used by the module to indicate the active channel as shown in Figure 14 The data bits from one channel and only one channel are transferred to e peee ELEELE CHANNELS 8 7 6 5 4 3 2 1 7557222 Figure 14 Active Channel Bits BIT 37 Xn the CPU with each CPU scan The active channel indicators indentify which channel corresponds to those data bits 12 CTI 2451 Installation and Operation Guide CTI 2451 Installation and Operation Guide 13 Data bits Xn 1 through Xn 16 contain the temperature data of the active channel Data bit Xn 0 is the overrange bit Data bit Xn 17 is not used see Figure 13 BIT
17. l Word Map Since the module requires a 32 bit input word the temperature millivolt 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 not used for the data value and is always 0 The LSB bit 0 is used to note values which are overrange 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 32 16 8 4 2 1 1 pr6 15 993 12 f0 7Jofsfafofa r o EN TRANSLATED BIT LSB DIGITAL WORD OVER EANGE SET TO 1 8 7 6 5 4 3 2 1 ACTIVE CHANNEL oo 37 96 35 34 a8 32 31 30 27 26 25 24 23 22 21 20 j NOT USED ACTIVE CHANNEL INDICATOR MSB Figure 3 Word Map 2 CTI 2451 Installation and Operation Guide 1 4 Thermocouple Input to Digital Conversion The following equations may be used to calculate the digital word in decimal format which will result from a particular thermocouple input Thermocouple Mode Digital Word bits 0 17 Degrees X10 Millivolt Mode Digital Word bits 0 17 Millivolts X100 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 Thermocouple Input Mode LSB oe ojofojojojojofojojof ojojojopo 3 2 vo ofofofofofofofofofo i ojojo o o as 32 16 8 4 2 1 LSB sa Dee of ofo ofol
18. mocouple Input Module for SIMATIC 405 programmable controllers We assume you are familiar with the operation of SIMATIC 405 Series programmable controllers Refer to the appropriate SIMATIC user documentation for specific information on the SIMATIC 405 programmable controllers and I O modules This Installation and Operation Guide is organized as follows Chapter provides a description of the module Chapter 2 covers installation and wiring Y Figure 1 The Model 2451 Thermocouple Input Module Chapter 3 is a guide to troubleshooting CTI 2451 Installation and Operation Guide iii CTI 2451 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 2451 Installation and Operation Guide v CTI 2451 Installation and Operation Guide TABLE OF CONTENTS PREFACE a a ki not ttle E T Ak DAI GAN SLi A OR DA a chal td 111 USAGE CONVENTIONS 63 505 06 04 a a a a v TABEE OF FIGURES eA iae belo A a a oe als ix CHAPTER 1 2 DESCRIPTION ostia titi 1 1 1 Asynchronous Operation o oooooooooo eee eee n teen enn 1 1 1 1 Active Channels tec a 1 1 2 Type J or Type K Thermocouple 0 cece eee eee eens 2 1 3 Digital Word Map piana cc E
19. nd 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 will 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 CTI 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 F
20. range Module not protected output data within bit set protected damage specification damage might occur might occur 0 5500 Figure 6 Effect of Voltage Input on Module Performance 1 6 Resolution The module has a resolution of approximately 0 2 degrees C 0 4 degrees F or exactly 0 02 millivolts The chart below shows the corresponding input resolution for each of the input configuration modes UNITS INPUT RESOLUTION TEMP DEGREES C 0 2 DEGREES C TEMP DEGREES F 0 4 DEGREES F MILLIVOLTS 0 02 MILLIVOLTS Figure 7 Input Resolution 4 CTI 2451 Installation and Operation Guide CHAPTER 2 INSTALLATION The installation of the Eight Channel Thermocouple Input Module involves the following steps 1 Planning the installation 2 Configuring the module 3 Inserting the module into the I O 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 I O Base Power Budget The Model 2451 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
21. ring enabled 21 Input Protection Input Bandwidth Filtering Time Constant 50 mV input step Update Time Open Thermocouple Reporting Module Power from Base Isolation Field Wiring Connector Mechanical Operating Temperature Relative Humidity Shipping Weight Specifications subject to change without notice 22 4000 Volts ESD 20 VDC from any input to channel common 20 VDC from any input to any other input on same channel 5 5 Hz digital filtering disabled 0 16 Hz digital filtering enabled 18 mSec digital filtering disabled 1 0 Sec digital filtering enabled 24 milliseconds for all eight channels To PLC as bit number one set 2 8 watts 5 VDC 1500 VDC channel to PLC Accepts 14 26 AWG Size single wide 405 module 0 to 60 C 32 to 140 F 5 to 95 non condensing 0 5 lbs CTI 2451 Installation and Operation Guide CTI 2451 Installation and Operation Guide USER NOTES 23 24 CTI 2451 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 a
22. s ololojols ojo ojolal us 32 16 8 4 2 1 1024 Figure 4 Example Change in Input Level 1 5 Effect of Out of Range Input Signals Thermocouple inputs exceeding the ANSI standard of 760 degrees C for Type J or 1372 degrees C for Type K will cause the overrange bit to be set A maximum temperature of 761 degrees C for Type J or 1373 degrees C for Type K will be returned to the PLC for any positive overrange input Similarily an input below O degrees C for Type J or O degrees C for Type K will cause the overrange bit to be set A temperature of 0 1 degree C will be returned to the PLC for Type J and Type K Type J Thermocouple 60V oc 760 C 60V C ir A Module not Underrange Accuracy Overrange Module not protected output data within bit set protected damage specification damage might occur might occur Figure 5 Effect of Temperature Input on Module Performance CTI 2451 Installation and Operation Guide 3 Millivolt inputs exceeding 55 00 millivolts will cause the overrange bit to be set A reading of 55 01 millivolts will be returned to the PLC for any positive overrange input Similarly a millivolt input below 0 millivolts will cause the overrange bit to be set A reading of 0 01 millivolt will be returned to the PLC for any negative input 0 55 60V Millivolts Millivolts 60V _ _ _ _ _ _____________ gt gt Module not Underrange Accuracy Over
23. sles CH2 Type K 6 5 eet CH3 Type J ve A Si trek 2 ype MILLIVOLTS epe TEMP ses 2 CH4 Type K FAHRENHEIT e erex CELSIUS oes Ol CHS Type J DIGITAL FILT DISABLED gt e p DIGITAL FILT ENABLED jp 19 a si Q che Type K NO JUMPER REQUIRED s se Bie es GHe Type K p 2 CH7 Type J a 13 78 ype ONE TYPE ia a CHANNEL NUMBERS JP 1s gsal 2 CH Type K OFF TYPEK I 104 CH8 Type J Le LO CH8 Type K swi NOTE DRAWING NOT TO SCALE Figure 8 Jumper Locations 6 CTI 2451 Installation and Operation Guide 2 4 1 Select Millivolt or Temperature Input Locate jumper JP36 MILLIVOLT TEMP jumper in Figure 8 on the 2451 card Select either Millivolts or Temperature for the module by positioning the jumper in MILLIVOLT or TEMP position In the millivolt mode jumpers JP1 16 JP35 and DIP switch SW1 are ignored by the 2451 2 4 2 Selecting Type J or Type K Thermocouple Inputs Select the cold junction compensation for each channel by selecting the correct jumper JP1 16 for each channel Select the correct linearization table by locating by DIP switch 1 SW1 in Figure 8 on the 2451 circuit card and select either Type J or Type K thermocouple for each of the eight inputs by moving each switch to the proper position The ON position corresponds to Type J thermocouple input 2 4 3 Selecting Digital Filtering Locate the Digital Filtering Jumper JP34 see Figure 8 To enable digital filtering set the jumper in
24. ule 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 When it is inconvenient to visually check the status indicator use the SIMATIC TISOFT Display Failed I O or Show PLC Diagnostics support functions If after consulting the chart above and you are unable to diagnose or solve the problem contact your local distributor or CTI at 1 800 537 8398 for further assistance CTI 2451 Installation and Operation Guide 19 20 CTI 2451 Installation and Operation Guide SPECIFICATIONS Channels Per Module Size Standard Thermocouple Types Type J Type K Special Order Types Absolute Temp Accuracy Temperature Resolution Millivolt Range Millivolt Input Impedance Absolute Millivolt Accuracy Millivolt Resolution Repeatability Common Mode Rejection Normal Mode Rejection CTI 2451 Installation and Operation Guide Eight Single wide 405 module 0 to 760 C 32 to 1400 F 0 to 1372 C 32 to 2501 F Consult Control Technolgy Inc 1 800 537 8398 1 C 2 F Approx 0 2 C Approx 0 6 F 0 to 55 Millivolts Greater than 10 KS 60 Hz Greater than 1000 Megohm DC 0 1 percent full scale or 55uV 0 02 mV 05 Full scale temp or mV Greater than 110 dB 60 Hz digital filtering disabled Greater than 160 dB 60 Hz digital filtering enabled Greater than 45 dB 60 Hz digital filte
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