Shielding; General; Bus Cables; Figure 19: Cable Shield At Ground Potential - WAGO I/O-SYSTEM 750 Manual

WAGO-I/O-SYSTEM 750
750-354/000-001 EtherCAT® Fieldbus Coupler, ID Switch
3.7

Shielding

3.7.1

General

Use of shielded cables reduces electromagnetic interference and thus increases
signal quality. Measurement errors, data transmission errors and interference
due to excessive voltage can be prevented.
Connect the cable shield to the ground potential!
Integrated shielding is mandatory to meet the technical specifications in regards
to measuring accuracy. Connect the cable shield and ground potential at the inlet
to the cabinet or housing. This allows induced interference to dissipate and to be
kept away from devices in the cabinet or housing.

Figure 19: Cable Shield at Ground Potential

Improve shielding performance by placing the shield over a large area!
Higher shielding performance is achieved via low-impedance connection
between shield and ground. For this purpose, connect the shield over a large
surface area, e.g., WAGO shield connecting system. This is especially
recommended for large-scale systems where equalizing current or high impulse-
type currents caused by atmospheric discharge may occur.
Keep data and signal lines away from sources of interference!
Route data and signal lines separately from all high voltage cables and other
sources of high electromagnetic emission (e.g., frequency converter or drives).
3.7.2

Bus Cables

The shielding of bus lines is described in the respective configuration guidelines
and standards of the bus system.
System Description
Manual
Version 1.2.1
39