Functional Ground - Grounding Concept - B&R Panel PC 2100 User Manual

Installation • Connecting to the power mains

2.3 Functional ground - Grounding concept

Functional ground is a current path of low impedance between electrical circuits and ground. It is used, for example,
to improve immunity to disturbances and not necessarily as a protective measure. It therefore serves only to deflect
disturbances, not to provide any kind of protection against electric shock.
This device comes equipped with two functional ground connections:
• Power supply
• Ground connection
To guarantee safe conductance of electric disturbances, the following points must be observed:
• The device must be connected to the central grounding point in the control cabinet using the shortest route
possible.
• A cable with a minimum cross section of 2.5 mm² per connection should be used. If a cable with wire end
sleeves is connected to the 0TB103.9 or 0TB103.91 terminal block, then a cable with maximum 1.5 mm²
per connection is possible.
• Note the line shielding concept. All data cables connected to the device must be shielded.
Symbol indicating functional ground on the B&R device:
174
Power supply
Ground connection
Figure 96: Panel PC 2100 - Grounding concept
Control cabinet
Grounding strip
Min. 1 .5 mm²
Min. 2 .5 mm²
Panel PC 2100 user's manual V1.11