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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 merchantability or fitness for a particular purpose.
This Installation and Operation Guide provides installation and operation instructions for the CTI 2552 Eight Channel Isolated RTD Input Module for SIMATIC® 505 programmable controllers. We assume you are familiar with the operation of SIMATIC® 505 series programmable controllers. Refer to the appropriate SIMATIC®...
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CT I 2552 Installation and O peration G uide...
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. CT I 2552 Installation and O peration G uide...
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CHAPTER 1. DESCRIPTION The 2552 Eight Channel RTD Input Module is a member of Control Technology's family of I/O modules compatible with the SIMATIC® 505 series programmable controllers. The Model 2552 is designed to translate 100 Ohm platinum RTDs, 120 Ohm nickel RTDs or millivolt input signals into equivalent digital words which are then sent to the programmable controller (PLC).
Millivolt Mode, Digital Word (WX) = Millivolts X 100 As an example, the following figure illustrates the effects of a change in input level going from 0 degrees to 102.4 degrees in the RTD Input Mode. CT I 2552 Installation and O peration G uide...
Figure 5 Effect of Voltage Input - Millivolts Similarly a millivolt input below 0 millivolts will cause the overrange bit to be set. A reading of 1 millivolt will be returned for any negative underrange input. CT I 2552 Installation and O peration G uide...
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 Figure 6 Input Resolution modes: CT I 2552 Installation and O peration G uide...
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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 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.
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 connectors and inserting...
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 or 120 type RTD for each of the eight inputs by turning each switch on or off. The "ON" position corresponds to 100 Ohm platinum RTD input.
Locate the Digital Filtering Jumper JP3 (see Figures 7 and 8). To enable digital filtering, 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.
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 the module. CT I 2552 Installation and O peration G uide...
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.
To assign an input to a specific channel, locate the appropriate channel position on the screw terminal Figure 10 Screw Terminal Block Wiring block as shown in the following figure: CT I 2552 Installation and O peration G uide...
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CAUTION: RTD wires must be of the same gauge. CT I 2552 Installation and O peration G uide...
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. CT I 2552 Installation and O peration G uide...
#2 of each channel group. The shielding for the cable should always be terminated at the Model 2552. Each isolated input channel contains its own local ground for the shield wire. The input 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 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 location WX2, etc. For your particular module, look in the chart for the number corresponding to the slot occupied by the module.
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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.
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Common Mode Rejection: Greater than 110 dB @ 60Hz (digital filtering disabled) Greater than 160 dB @ 60Hz (digital filtering enabled) Normal Mode Rejection: Greater than 45 dB @ 60Hz (digital filtering enabled) CT I 2552 Installation and O peration G uide...
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-40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit) Humidity: 0% to 95%, noncondensing Agency Approvals: UL, UL Canada FM (Class I, Div 2), CE Specifications subject to change without notice. CT I 2552 Installation and O peration G uide...
JUMPER SETTINGS LOG SHEET Figure 15 Factory Configuration Jumper Settings Record the configuration jumper settings on this log for future reference. Make additional copies if necessary. CT I 2552 Installation and O peration G uide...
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USER NOTES CT I 2552 Installation and O peration G uide...
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...
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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.
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