Siemens RF180C - Page 29

Connecting
4.5 Connecting the RF180C to functional ground (PE)
RF180C communication module
Operating Instructions, 12/2012, J31069-D0177-U001-A6-7618
29
Requirements
● Always make sure there is a low-resistance connection to the functional ground (PE).
● If you use the fixing screw as grounding connection, the thread of the fixing screw or the
contact facing of the fastening nut on the base must be unpainted. This ensures a low-
resistance connection.
Required tools (only if grounding via the grounding cable is required).
● Screwdriver
● Stripping tool
● Crimp tool
Required accessories (only if grounding via the grounding cable is required).
● M5 x 10 grounding screw and washers
● Grounding cable (copper braided cable) with minimum cross-section of 4 mm
2
● Cable lug
Connecting the RF180C to functional ground (PE)
Standard grounding via the securing screw Optional grounding via a grounding cable
1. Mount the module on the grounded, metallic base as
described in section "Mounting the I/O module
(Page 12)"
.
① Grounded, metallic base
② Unpainted thread or nut base
1. Isolate the grounding cable and secure the cable lug.
2. Screw the cable lug on to the communication module
(M5 grounding screw). The tightening torque is 3 Nm.
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