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24 VDC supply
The following table shows you the items you have to take into account in respect of
the 24 VDC supply.
With ...
Buildings
24 VDC supply lines,
signal lines
24 VDC supply
Protection against external electrical phenomena
The following table shows you the items you have to take into account in respect of
protection against electrical phenomena or faults.
Any plant or system in
which the ET 200X is
installed
Supply, signal and bus
lines
Signal and bus lines
ET 200X Distributed I/O Device
EWA 4NEB 780601602-06
Outdoor lightning
protection
Indoor lightning
protection
Safe (electrical) isolation of extra-low voltage
With ...
The plant or system is connected to a protective
ground for diverting electromagnetic interference.
The wiring arrangement and installation are correct.
Any break of a line or conductor does not result in
undefined states of the plant or system.
Pay attention to ...
Take lightning protection
precautions
– for example, lightning
conductors
Make sure that ...
Wiring
4-3
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