Connection For Side-By-Side Installation Of Cabinet Units - Siemens SINAMICS S120 Device Manual

Electrical installation
4.5 Connections
Description
The DC busbar is used to connect Line Modules with Motor Modules; the connection is
made using prefabricated busbar sets with different current-conducting capacities.
The DC busbar can be optionally included in the following Cabinet Modules:
● Line Connection Module
● Auxiliary Power Supply Module
4.5.4.2

Connection for side-by-side installation of cabinet units

Note
DC busbar
The procedure described below uses a DC busbar 1 x 60 x 10 mm (option M80) as an
example, but applies to all other DC busbar versions as well.
For the other available versions, the number of jumpers used on each busbar for connecting
the DC busbar is as follows:
• 1 jumper for each DC busbar for 1 x nn x 10 busbars (options M80 to M82)
• 2 jumpers for a DC busbar comprising 2 x nn x 10 busbars (options M83 to M85)
• 3 jumpers for a DC busbar comprising 3 x nn x 10 busbars (options M86 and M87)
A connection jumper (
cabinet is used to connect the DC busbar across several Cabinet Modules. This connection
jumper is already integrated in every DC busbar of the Cabinet Modules.
Preparatory steps
● Install and secure the cabinet units properly.
● Verify that the cabinet units to be connected have been isolated from the supply.
● Enable unimpeded access to the DC busbar (if necessary, remove the protective covers
during installation work).
Note
Better accessibility from the top
In some cases, it is far simpler to connect the DC busbar from the top (with the hood or top
cover removed) than from the front.
76
①
in the diagram below) on the right side of the DC busbar in the
Cabinet Modules NEMA
Manual, 04/2014, A5E03586450A