Siemens simatic s7-1500 User Manual page 22

Wiring
Connection: Non-grounded thermocouples for external/internal compensation and connection of a
resistance thermometer (RTD) to channel 8 (CH8) or the reference channel
The following figure shows an example of the pin assignment of non-grounded
thermocouples for external/internal compensation and the connection of a resistance
thermometer (RTD) at the reference channel.
①
Wiring of a thermocouple (non-grounded) for internal compensa-
tion
②
Wiring of a thermocouple (non-grounded) for external compensa-
tion
③
Analog-to-Digital Converter (ADC)
④
Electrical isolation
⑤
Backplane bus interface
⑥
Supply voltage via power supply element
⑦
Backplane bus interface potential bonding cable (optional)
Figure 3-4 Block diagram and pin assignment for non-grounded thermocouples and resistance thermometers
22
CHx Channel or 9 x channel status
(green/red)
RUN Status display LED (green)
ERROR Error display LED (red)
PWR LED for power supply (green)
Analog Input Module AI 8xU/R/RTD/TC HF (6ES7531-7PF00-0AB0)
Manual, 09/2016, A5E36647959-AB