Siemens SIMATIC RF185C Operating Instructions Manual page 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.
NOTICE
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.
①
②
Figure 5-8
SIMATIC RF185C, RF186C, RF188C, RF186CI, RF188CI
Operating Instructions, 04/2020, C79000-G8976-C512-03
Grounded, metallic base
Unpainted thread or nut support
Mounting the CM on a conductive base
5.4 Connecting CM to functional ground
Connection
37