A-11 Shielding And Grounding With A Great Distance Between Monitor And Programmable Controller - Siemens S7-400 Installation Manual
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Assembling and Installing Systems
Caution
!
There is a risk of personal injury.
Dangerous touch voltages may be present at the video sockets of the monitor.
Fit suitable touch protection to the sockets.
• Connect the ground clamp of the monitor to the chassis ground.
• Connect the cable shields to the ground clamp of the monitor as follows:
Proceed as follows:
– Strip the outer cable insulation of the video cables in the region of the ground
clamp of the monitor, without damaging the braided shield.
– Secure the outer braided shield over a large area to the ground clamp of the
monitor.
Figure A-11 shows a simplified representation of shielding and grounding for
monitor and S7-400.
CR
CP
Ó Ó
Ó
Figure A-11
Shielding and Grounding with a Great Distance between Monitor and Programmable
Controller
A-36
Shield bus
S7-400 and M7-400 Programmable Controllers Hardware and Installation
Monitor with
separate
electronic
ground and
housing
ground
Outer shield
connected
to ground
clamp
A5E00069481-04
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