Connecting Shielded Cables Via A Shield Contact Element; Assignment Of Cable Cross-Sections And Terminal Elements - Siemens SIMATIC ET 200M Manual

5.2.4

Connecting Shielded Cables via a Shield Contact 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:
S Connect all S7-300 module shielded cables to ground
S Connect the interconnecting cable to ground.
Design of the Shield Contact Element
The shield contact element consists of the following parts:
S A mounting bracket with two bolts for attaching the element to the rail (Order
No.: 6ES7 390-5AA00-0AA0)
S The shield terminals
Depending on the cable cross-sections used, you must use the following shield
terminal:
Table 5-6

Assignment of cable cross-sections and terminal elements

2 cables with a shield diameter of 2 to
6 mm each
1 cable with a shield diameter of 3 to
1 cable with a shield diameter of 4 to 13 mm
interconnecting cable
The shield contact element is 80 mm wide with space for two rows each with
4 shield terminals.
Distributed I/O Device ET 200M
EWA-4NEB780600602-06
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Cable and shield diameter
Wiring
Shield terminal
Order no.:
6ES7 390-5AB00-0AA0
6ES7 390-5BA00-0AA0
6ES7 390-5CA00-0AA0
5-21