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C T I 2552 Installation and O peration G uide

19

Figure 14

Troubleshooting Matrix

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.

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.

When it is inconvenient to visually check the status indicator, use the TISOFT "Display Failed I/O" or
"Show PLC Diagnostics" support functions.

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.

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Содержание 062-00108

Страница 1: ...CTI 2552 EIGHT CHANNEL ISOLATED RTD INPUT MODULE INSTALLATION AND OPERATION GUIDE Ver 2 1 CTI Part 062 00108 2552IOG 051403 25 ...

Страница 2: ...r 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 o...

Страница 3: ...TIC 505 programmable controllers We assume you are familiar with the operation of SIMATIC 505 series programmable controllers Refer to the appropriate SIMATIC user documentation for specific information on the SIMATIC 505 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 installatio...

Страница 4: ...iv CTI 2552 Installation and Operation Guide ...

Страница 5: ...5 2 1 Planning the Installation 5 2 2 Calculating the I O Base Power Budget 5 2 3 Unpacking the Module 5 2 4 Configuring the Module 6 2 4 1 Select Temperature or Millivolt Input 6 2 4 2 Selecting 3 Wire or 4 Wire Operation 6 2 4 3 Selecting 100 Ohm or 120 Ohm RTD Inputs 6 2 4 4 Selecting Digital Filtering 7 2 4 5 Select Degrees Celsius or Fahrenheit 7 2 5 Inserting the Module Into the I O Base 8 2...

Страница 6: ...vi CTI 2552 Installation and Operation Guide ...

Страница 7: ...oltage Input Millivolts 3 Figure 6 Input Resolution 4 Figure 7 Factory Configuration Jumper Settings 7 Figure 8 Configuration Jumper Locations 8 Figure 9 Copper Wire Table at 25 Degrees Celsius 9 Figure 10 Screw Terminal Block Wiring 10 Figure 11 Wiring Diagram for 2 3 or 4 Wire RTD 11 Figure 12 Wiring Diagram for Millivolt Measurements 12 Figure 13 Example I O Configuration Chart 13 Figure 14 Tro...

Страница 8: ...viii CTI 2552 Installation and Operation Guide ...

Страница 9: ...OTE 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 USAGE CONVENTIONS ...

Страница 10: ...x CTI 2552 Installation and Operation Guide ...

Страница 11: ...nchronous Operation The module operates asynchronously with respect to the PLC a scan of the PLC and input sampling of the module do not occur at the same time Instead the module will translate all inputs in one module update 15 milliseconds maximum and store the translated words in a buffer memory The PLC retrieves the stored words from the module buffer memory at the start of the I O scan 1 1 1 ...

Страница 12: ...gure of the two bits not used for the digital word one is used to show the sign of the word while the other is used to note values which are overrange 1 4 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 WX Degrees X 10 Millivolt Mode Digital Word WX Millivolts X 1...

Страница 13: ...CTI 2552 Installation and Operation Guide 3 Figure 3 Example Change Input Level ...

Страница 14: ... positive overrange input Similarly an input below 199 8 degrees C for 100 Ohm platinum or 79 8 degrees C for 120 Ohm nickel will cause the overrange bit to be set A minimum temperature of 199 9 degrees C for 100 Ohm platinum or 79 9 degrees C for 120 Ohm nickel will be returned for any negative underrange input Millivolt inputs exceeding 103 04 millivolts will cause the overrange bit to be set A ...

Страница 15: ...igure 6 Input Resolution 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 per step for each of the input configuration modes ...

Страница 16: ...6 CTI 2552 Installation and Operation Guide ...

Страница 17: ...llowing 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 2552 requires 2 8 watts of 5 V power from the I O base Use this figure to v...

Страница 18: ...temperature measurements After discharging any static build up remove the module from the static bag Do not discard the static bag You will need it for the following configuration procedure 2 4 Configuring the Module The Model 2552 must be configured for 100 Ohm platinum or 120 Ohm nickel RTDs 2 3 or 4 wire or millivolt range and digital filtering no filtering mode before wiring the input connecto...

Страница 19: ...djacent to the input terminal strip see Figures 7 and 8 For each input channel select 3 wire mode by placing the jumper in the 3 wire position or 4 wire mode by placing the jumper in the 4 wire position If 2 wire operation is desired use the 4 wire position 2 4 3 Selecting 100 Ohm or 120 Ohm RTD Inputs Locate DIP switch 1 RTD Type Switches in Figure 8 on the 2552 circuit card and select either 100...

Страница 20: ...ering set the jumper in the ENABLED position Since many analog input signals contain noise CTI recommends using digital filtering unless maximum response time is required 2 4 5 Select Degrees Celsius or Fahrenheit Locate the temperature scaling jumper JP4 on the right hand side of the module see Figure 8 and select either degrees Fahrenheit or Celsius by positioning the jumper in the DEG F or DEG ...

Страница 21: ...t 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 damage the connector card at the back of the module when inserting or removing...

Страница 22: ...fixed connector to terminate field wiring This is used because the chemistry of a removable connector may have an adverse effect on the accuracy of the measurement CTI has carefully selected a connector that minimizes this effect Refer to Figure 11 for correct wiring for 2 3 or 4 wire RTDs to the Model 2552 Each channel group consists of four screw terminals See Figure 10 The Model 2552 may compen...

Страница 23: ...stallation and Operation Guide 13 Figure 10 Screw Terminal Block Wiring To assign an input to a specific channel locate the appropriate channel position on the screw terminal block as shown in the following figure ...

Страница 24: ...14 CTI 2552 Installation and Operation Guide CAUTION RTD wires must be of the same gauge ...

Страница 25: ...I 2552 Installation and Operation Guide 15 Figure 11 Wiring Diagram for 2 3 or 4 Wire RTD CAUTION For proper operation ensure that the 2552 is not subjected to large temperature gradients during operation ...

Страница 26: ...nput isolation amplifier is designed in this manner by the manufacturer Standard practices usually require that all shields be tied together and grounded at a single point In an isolated system this will actually impede the system to reject noise The correct method for terminating the shields on an isolated channel is to connect them to the channel s local ground This will provide the best perform...

Страница 27: ...ating 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 or TISOFT Programming Manual An example chart is shown in the following figure In this example the 2552 Module is inserted in slot 1 in I O base 0 Data for channel 1 appears in word location WX1 data for channel 2 appears in word loca...

Страница 28: ...18 CTI 2552 Installation and Operation Guide ...

Страница 29: ...OTING If the module provides improper readings or the status indicator is not on use the following chart to determine the appropriate corrective action When it is inconvenient to visually check the status indicator use the TISOFT Display Failed I O or Show PLC Diagnostics support functions If after consulting the chart above you are unable to diagnose or solve the problem contact your local distri...

Страница 30: ...20 CTI 2552 Installation and Operation Guide ...

Страница 31: ...chnology Inc 1 800 537 8398 Absolute Temp Accuracy 0 4 degrees Celsius at calibrated temperature 25 C 0 8 degrees Fahrenheit over operating range 0 to 60 C worst case Millivolt Range 0 to 103 04 Millivolts Millivolt Input impedance Greater than 10 KOhm 60Hz Greater than 1000 MegOhm DC Absolute Millivolt Accuracy 0 5 percent full scale or 500 uV Repeatability 05 Full Scale temp or mV Resolution 025...

Страница 32: ...lliseconds for all eight channels Open RTD Reporting To PLC as bit number one set Bias Current to RTD Probe 250 microamp nominal Wire Resistance Compensation Up to 20 Ohms per lead wire Module Power from Base 2 8 watts 5VDC Isolation 1500 VDC channel to channel and channel to PLC Field Wiring Connector Accepts 18 26 AWG Mechanical Size single wide 505 Module Operating Temperature 0 to 60 degrees C...

Страница 33: ...allation and Operation Guide 23 Figure 15 Factory Configuration Jumper Settings JUMPER SETTINGS LOG SHEET Record the configuration jumper settings on this log for future reference Make additional copies if necessary ...

Страница 34: ...24 CTI 2552 Installation and Operation Guide USER NOTES ...

Страница 35: ...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...

Страница 36: ...26 CTI 2552 Installation and Operation Guide ...

Страница 37: ...nt 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 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 othe...

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