➀
Grounding strips
If there are no large-area metal-to-metal connections, you must
connect inactive metal parts such as cabinet doors and supports
with grounding strips. These should be short and have a large
surface.
➁
Cabinet members
The cabinet members should have a large-area connection to the
cabinet housing (metal-to-metal connection).
➂
Mounting bracket for subrack
There must be a large-area metal-to-metal connection between
cabinet member and mounting bracket.
➃
Signal lines
With shielded signal lines, the shield must be secured to the
protective conductor bar or an additionally fitted shield bar using
large-area cable clamps.
➄
Cable clamp
The cable clamp must enclose and make contact with the shield
braid over a large area.
➅
Shield bar
This bar must have a large-area connection to the cabinet
members (metal-to-metal connection). It serves for grounding the
cable shields.
➆
Protective conductor bar
The protective conductor bar must have a large-area connection to
the cabinet members (metal-to-metal connection). The protective
conductor bar must be connected to the protective conductor
system via an external conductor (at least 10 mm
2
). This is
essential for providing a reliable path to ground for fault currents
and interference currents.
➇
Conductor to the protective conductor system (ground point)
The conductor must have a large-area connection to the protective
conductor system (ground point).
3
Installation of Programmable Controllers for EMC
System Manual
C79000-B8576-C199-03
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