Example Of Rack And Wall Mounting For Emc - Siemens S5-155U System Manual

Installation of Programmable Controllers for EMC
3.2.3
Example of Rack and Wall
Mounting for EMC
3 - 12
To operate your control system in a low-interference environment
whilst observing the permissible ambient conditions (see "Technical
Specifications"), you can mount the programmable controllers on
racks or directly on walls.
Picked-up interference should be given a path to large metal surfaces.
You should therefore secure standard sectional rails, shield and
protective conductor bars to metal structural elements. For wall
mounting in particular, installation on reference potential surfaces
made of sheet steel has proved advantageous.
When installing shielded cables, provide a shield bar for connecting
the cable shields. The shield bar can also be the protective conductor
bar.
Ensure the following for rack and wall mounting:
• • Suitable contacting aids should be used on painted and anodized
metal parts. Use special contact washers or remove the insulating
protective layers.
• • Provide large-area, low-impedance metal-to-metal connections
when securing the shield/protective conductor bar.
• • AC conductors must be covered.
System Manual
C79000-B8576-C199-03