Installation Guidelines

ÀGrounding 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.

￿Cabinet members

The cabinet members should have a large-area connection to the cabinet housing (metal-to-metal connection).

￿Mounting bracket for subrack

There must be a large-area metal-to-metal connection between cabinet member and mounting bracket.

￿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.

￿Cable clamp

The cable clamp must enclose and make contact with the shield braid over a large area.

￿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.

￿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 mm2 ). This is essential for providing a reliable path to ground for fault currents and interference currents.

￿Conductor to the protective conductor system (ground point) The conductor must have a large-area connection to the protective conductor system (ground point).

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System Manual

C79000-G8576-C199-06

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Image 36
Siemens S5-135U/155U appendix Grounding strips, Cabinet members, Mounting bracket for subrack, Signal lines, Cable clamp
Page 35 Page 37
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