Siemens SINAMICS S120 Equipment Manual page 62

Electrical installation
4.5 Connections
CAUTION
The screws must only be loosened rather than removed because otherwise the nuts could
fall into the device.
The torque (50 Nm) must be observed to avoid excessive heating of the terminal contacts
during operation.
All jumpers of the DC busbar must always be connected in busbar systems.
For each cabinet row installed, you must mount one side panel on the right (option M26)
and one on the left (option M27).
Before mounting the side panels on an installed cabinet row, you must remove any jumpers
present in the DC busbars of the cabinet on the right.
Note
In the case of transport units with standard integrated DC busbars within the cabinet group,
you only need to connect the ends of the busbars of the transport units.
62
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A