Line voltage in the safe area
The following table describes points to remember relating to the line voltage:
Table 6-2 Line voltage in the safe area
With ... Requirements
A xed 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 device The uctuation/deviation of the mains voltage
from the nominal value are within the permissible
tolerance (see "General technical specications
(Page 239)").
DC 24 V supply in the safe area
The following table shows what you have to note with the DC 24 V supply:
Table 6-3 DC 24V supply in the safe area
With ... you must note the following...
Buildings exterior lightning protection Provide lightning protection meas‐
ures (e.g. overvoltage suppressor)
DC 24 V supply lines, signal
lines
Interior lightning protection
DC 24 V supply Safety isolation
Protection against exterior electric eects
The following table shows what you have to note to protect against electric eects or faults:
Table 6-4 Protection against exterior electric eects
With ... you must note the following...
All systems in which ET 200iSP is installed Functional ground is required for the plant or sys‐
tem to conduct EMC inuences out.
Supply, signal and bus lines The cable routing and installation must be correct.
Signal and bus lines that a cable or wire break cannot lead to undened
system states.
Wiring
6.1 General Rules and Regulations for Wiring
ET 200iSP
120 Operating Instructions, 11/2022, A5E00247483-AK
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