Line voltage in the safe area
The following table describes points to remember relating to the line voltage:
Table 5-2
Line voltage in the safe area
With ...
Requirements
A fixed installation or systems without all-pole dis‐
connector
A disconnector or a fuse must exist in the building
installation.
Load power supplies, power supply modules
The set rated voltage range must correspond to
the local line voltage.
All circuits of the ET 200iSP distributed I/O station Any fluctuation/deviation in the supply voltage
from the rated value must be within the permitted
tolerance (refer to "General technical specifica‐
tions (Page 195)").
24 VDC supply in safe area
The following table shows what you have to note with the 24 VDC supply:
Table 5-3
24 VDC supply in the safe area
With ...
you must note the following...
Buildings
exterior lightning protection
Provide lightning protection meas‐
ures (e.g. overvoltage suppressor)
24 VDC supply lines, signal
lines
Interior lightning protection
24 VDC supply
Safety isolation
Protection against exterior electric effects
The following table shows what you have to note to protect against electric effects or faults:
Table 5-4
Protection against exterior electric effects
With ...
you must note the following...
All systems in which ET 200iSP is installed
That the system for discharging electromagnetic
faults is connected to a PE conductor.
Supply, signal and bus lines
The wiring arrangement and installation must be
correct.
Signal and bus lines
that a cable or wire break cannot lead to undefined
system states.
Wiring
5.1 General Rules and Regulations for Wiring
ET 200iSP
104
Operating Instructions, 11/2017, A5E00247483-07