4.4 Power supply
Power supply
The power supply is connected using a 2-terminal plug-in block. The power supply is connected
over a high resistance to the S7 mounting rail to allow an ungrounded set up. The power supply
is non-oating.
Figure 4-2 Connecting the power supply
Figure 4-3 Pin assignment of the terminal block
Table 4-1 Pin assignment for the power supply
Pin number Assignment
Pin 1 L+ (24 V DC)
Pin 2 M (chassis ground)
WARNING
Never connect the device to AC voltage.
Never operate the device with DC voltage higher than 28.8 V DC.
Installation
4.4 Power supply
Compact Switch Module CSM 377
26 Operating Instructions, 06/2022, A2B00073499-02
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