Electrical installation
Wiring
Terminal assignment
4
43
EDK94ZPM113 DE/EN/FR/ES/IT 1.0
4.3.4 Terminal assignment
Tip!
Complete the wiring of the installation backplane before plugging
in the standard device. The upper terminals of the installation
backplane cannot be connected with a plugged-in standard device.
IT system
Stop!
Overvoltage on components:
On IT systems an earth fault in the installation can cause
impermissible overvoltages.
Possible consequences:
Destruction of the device.
Protective measures:
If the devices are operated on IT systems, the internal connection of
the filters to the protective earth in the installation backplane has
to be disconnected.
1
2
SSP94IT001
Fig.7-4 Plugging the IT insulating cap onto the earthing jumper
Proceed as follows to disconnect the internal connection of the filters to the
protective earth:
1. Remove the IT insulating cap from its parking position c.
– To do so, place a screw driver at the right or left side and lever off the
insulating cap.
– Alternatively, the insulating cap can be pulled off carefully using an
appropriate pair of pliers.
2. Plug the IT insulating cap onto the earthing jumper d until it snaps into
place.
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