Siemens SIMATIC S7-1200 Operating Instructions Manual - Page 22

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Siemens SIMATIC S7-1200 Operating Instructions Manual
Mounting

4.3 Power supply

4.3
Power supply
Power supply
The power supply is connected using a 3-pin plug-in terminal block. The functional ground
can be connected to the grounded DIN rail. It does not need to be connected for problem-
free operation. The power supply is non-floating.
Figure 4-4
Figure 4-5
Table 4- 1
Pin number
Pin 1
Pin 2
Pin 3
22
Connecting the power supply
Pin assignment of the terminal block
Pin assignment for the power supply
Assignment
L+ (24 V DC)
M (chassis ground)
Functional ground
Compact Switch Module CSM 1277
Operating Instructions, V. 1.20, A2B00079397B