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Connecting
5.2 Operation of the CM on grounded/ungrounded power supply
RF166C in its overall configuration
The following figure shows the communications module in its overall electrical design.
①
②
③
④
Figure 5-3
30
Main switch
Short-circuit and overvoltage protection
Fuses for line protection (automatic circuit breaker for 16 A)
When setting up the communications module with ungrounded reference potential, there is no
connection between 1M, 2M and FE
Electrical design
Operating Instructions, 03/2022, C79000-G8976-C578-02
SIMATIC RF166C
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