100 Connect Devices
WAGO I/O SYSTEM 750 XTR
750-8202/040-001 PFC200 2ETH RS TELE XTR
Manual
Version 1.2.0, valid from FW Version 03.01.07(13)
6.5
Shielding
6.5.1
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 31: 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).
6.5.2
Fieldbus Cables
The shielding of fieldbus lines is described in the respective configuration
guidelines and standards of the fieldbus system. Information on this can be
provided by the corresponding fieldbus organization or specialist literature.
