Siemens RF180C Operating Instructions Manual page 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
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
● Cable lug
Connecting the RF180C to functional ground (PE)
Standard grounding via the securing screw
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
RF180C communication module
Operating Instructions, 12/2012, J31069-D0177-U001-A6-7618
contact facing of the fastening nut on the base must be unpainted. This ensures a low-
resistance connection.
4.5 Connecting the RF180C to functional ground (PE)
Optional grounding via a grounding cable
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.
Connecting
2
29