Siemens SIMATIC S7-1500 Manual page 21

Connection: Grounded thermocouples for internal compensation
The following figure shows an example of the pin assignment for grounded thermocouples
for internal compensation.
①
Wiring of a thermocouple (grounded) for internal compen-
sation
②
Analog-to-digital converter (ADC)
③
Backplane bus interface
④
Supply voltage via power supply element
⑤
Equipotential bonding cable (optional)
Figure 3-7 Block diagram and pin assignment for grounded thermocouples
Analog input module AI 8xU/I/RTD/TC ST (6ES7531-7KF00-0AB0)
Manual, 09/2016, A5E03484864-AD
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)
Wiring
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