Connecting
5.4 Wiring the power supply and modules
ET 200M
Operating Instructions, 12/2008, EWA-4NEB780600602-08
85
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
(order no.: 6ES7390-5AA00-0AA0) as well as
● The shield terminals
Depending on the cable cross-sections used, you must use the following shield terminal:
Table 5- 5 Assignment of cable cross-sections and terminal elements
Cable and shield diameter Shield connection terminal
order no.:
2 lines with in each case 2 to 6 mm shield diameter 6ES7390-5AB00-0AA0
1 line with 3 to 8 mm shield diameter 6ES7390-5BA00-0AA0
1 line with 4 to 13 mm shield diameter
Bus cable
6ES7390-5CA00-0AA0
The shield contact element is 80 mm wide with space for two rows each with 4 shield
terminals.
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