Siemens SIMATIC S7-1500 Manual page 15

Pin assignment for the power supply element
The power supply element is plugged onto the front connector for powering the analog
module. Wire the supply voltage to terminals 41 (L+) and 43 (M).
Figure 3-1
Analog Input Module AI 4xU/I/RTD/TC ST (6ES7531-7QD00-0AB0)
Manual, 09/2016, A5E32366209-AC
Power supply element wiring
3.1 Wiring and block diagrams
Wiring
15