Siemens Simatic S7-300 CPU 31xC Series Installation And Operating Instructions Manual page 112

Wiring
6.8 Connecting shielded cables to the shielding contact element
Terminating 2-wire cables on shielding contact elements
Only one or two shielded cables may be terminated per shielding terminal (see the figure
below). The cable is clamped down at the stripped cable shielding.
1. Strip the cable shielding to a length of at least 20 mm.
2. Clamp in the stripped cable shielding underneath the shielding terminal.
The figure illustrates the following
(1)
(2)
Hint
Provide a sufficient cable length between the shielding terminal and the front connector. This
allows you to disconnect the front connector for repairs, without having to disconnect the
shielding terminal also, for example.
6-14
Push the shielding terminal towards the module (1) and feed the cable through the clamp
opening (2).
If you need more than four shielding terminals, start wiring at the rear row of the shielding
contact element.
P S
C P U
Magnified view of the shielding terminal
Wiring of the shielding terminal
2
1
2 2
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05