Siemens SIMATIC RF185C Operating Instructions Manual page 27

RF18xC in overall configuration
The following figure shows the communications module in its overall electrical design.
①
②
③
④
Figure 5-4
SIMATIC RF185C, RF186C, RF188C
Operating Instructions, 10/2018, C79000-G8976-C512-01
5.1 Operation of the CM on grounded/ungrounded power supply
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
Connection
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