Input Wiring Of Channel 15 (Compensation Channel) - Siemens SIMATIC S5 Manual

3.1.3 Input Wiring of Channel 15 (Compensation Channel)

A three-wire Pt 100 resistance thermometer can be connected to channel 15 that measures the
reference junction temperature. The Pt 100 must be in thermal contact with the terminals that
form the interface between the thermal wires and the copper wires. The microprocessor cor-
rects the temperature values measured by the thermocouples that are connected to channels 0
... 12 by the value of the reference junction temperature. The results are the actual values for
the closed-loop process.
IP244B
C79000–B8576–C865–01
Operation
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