3.5 Terminal assignment
BU 0750 GB Technical design subject to change 47
3.4.1 How to install the special extension units
1. Switch off the mains voltage and wait a few
minutes as recommended.
2. Loosen the 8 screws with which the device
cover is attached and remove it. Take care not
to disturb the PE connection.
3. Push extension unit into the right guide rail by
exerting a light pressure until it snaps into
place.
4. Unlatch the connector and pull it off. Make the
required connections. Then plug the pins until
they catch.
5. Reattach all covers.
Only skilled and qualified personnel should be allowed to perform installation work. In doing so they
will have to make every effort to observe and adhere to the safety instructions and warnings men-
tioned in the present Manual.
Always remove the power from the inverter before you connect or disconnect custom interfaces.
Whenever a module has been inserted, exchanged or removed, the inverter acknowledges this action
by generating the E017 message Change of custom interfac.
Be sure to reestablish all of the PE connections!
Make absolutely sure that the PE conductor
is properly connected (see graphics oppo-
site). The device must not be operated oth-
erwise!
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