Using The Module For Resistance-Type Sensors (Pt 100) - Siemens SIMATIC S5 Manual

3.1.4 Using the Module for Resistance-Type Sensors (Pt 100)

Only 8 channels are available if the temperature control module is used in Pt 100 mode. The
sensors are fed from the module via S+ / S– .
The sensors are connected via 4 wires. Mixed configurations with thermocouples, or a combina-
tion with heater current measurement and special function are not possible.
To perform measurements with resistance-type sensors, use the following procedure:
– Select an input sensitivity of 512 mV/1024 mV (X8)
– Remove the voltage dividers from channels 13 and 14 (X9, X10)
– Switch channel 15 from compensation mode to normal input (X11)
The required module assignments and configuration is described in Chapter 3.4.
The figure below shows the connection of resistance-type sensors:
Bild 3-1 Fig. 3.1.4/1 Connection of resistance-type sensors
IP244B
C79000–B8576–C865–01
Operation
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