Connection
5.4 Connecting CM to functional ground
SIMATIC RF185C, RF186C, RF188C, RF186CI, RF188CI
Operating Instructions, 04/2020, C79000-G8976-C512-03
37
Mounting
Proceed as follows to connect the communications module to functional ground via a
conductive mounting base:
1. Drill 2 mounting holes with a distance of 155.6 mm.
2. Screw the module together with the M4 fastening screws with a torque of 1.2 Nm.
Grounding with a conductive mounting base
If you fasten the communications module to a conductive, grounded base, the lower
fastening screw provides a conductive connection to the ground potential.
Ensure there is a low-impedance connection between the communications module and the
conductive base and between the conductive base and functional ground.
Unpainted thread or nut support
Figure 5-8 Mounting the CM on a conductive base
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