X20 system
3.4.1.2.2 X20 cable shield plate
As described in chapter "Shield connection" on page 16, B&R recommends always connecting the shield solidly to
the conductive and well-grounded backplane using shielding clamps in combination with the X20 shielding bracket,
which is available as an accessory.
The X20 cable shield clamp (model number X20AC0SG1) is latched to the terminal block and connected to the bus
module's ground connection using a cable lug. Cable ties are used to press the shield against the grounding plate.
Figure 11: Shielding via X20 cable shield clamp
To reduce the EMC emissions most effectively, the cable shield must be as long as possible after the cable tie
(see ① in the diagram above).
18 Installation / EMC guide 1.36 (April 2021)
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