Siemens SIMATIC ET 200M Operating Instructions Manual page 87

5.4.4 Connecting shielded cables via a shield connecting element
Introduction
This section tells you how to connect the shield of shielded signal lines to ground via a shield
contact element. The connection to ground is achieved by direct contact between the shield
contact element and the rail.
Application
You can do the following easily with the shield contact element:
● connecting all shielded lines from the S7-300 modules to ground
● Connect the interconnecting cable to ground.
Design of the Shield Contact Element
The shield contact element consists of the following parts:
● a clamp with 2 screwed bolts for fixing to the rail
● The shield terminals
Depending on the cable cross-sections used, you must use the following shield terminal:
Table 5- 5
Cable and shield diameter
2 lines with in each case 2 to 6 mm shield diameter
1 line with 3 to 8 mm shield diameter
1 line with 4 to 13 mm shield diameter
Bus cable
The shield contact element is 80 mm wide with space for two rows each with 4 shield
terminals.
ET 200M
Operating Instructions, 12/2008, EWA-4NEB780600602-08
(order no.: 6ES7390-5AA00-0AA0) as well as
Assignment of cable cross-sections and terminal elements
5.4 Wiring the power supply and modules
Shield connection terminal
order no.:
6ES7390-5AB00-0AA0
6ES7390-5BA00-0AA0
6ES7390-5CA00-0AA0
Connecting
85