Assembling and Installing Systems
A-12 AutomationSystem S7-400 Hardwareand Installation
A5E00850741-01
Ensure the following for frame and wall mounting:
Use special contact washers with painted and anodized metal parts, or remove
the insulating protective layers.
Provide large-area, low-impedance metal-to-metal connections when securing
the shield/protective ground bar.
Cover the AC supply conductors in a shockproof arrangement.
Figure A-3 shows an example of wall mounting for EMC
Figure A-3 WallMounting an S7-400 for EMC