Siemens SINAMICS S120 Equipment Manual page 61

Preparatory steps
● Verify that the cabinet units to be connected have been isolated from the supply.
● Install and secure the cabinet units properly.
● Observe the "five safety rules".
● Allow unimpeded access to the DC busbar
Establishing the connection
1. Loosen the 2 x M12 nuts on the upper DC busbar (DC P) on the right side of the first
2. Loosen the 2 x M12 nuts on the DC busbar on the left side of the second cabinet.
3. Pull out the jumper (1) from the DC busbar in the first cabinet and slide it into the DC
4. Re-tighten the nuts on the DC busbar in both cabinet units
5. Repeat steps 1 to 4 for the lower DC busbar (DC N).
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A
(if necessary, remove the protective covers).
Figure 4-7 Connecting the DC busbar when cabinet units are installed side-by-side
cabinet.
busbar of the second cabinet as far as it will go.
(torque: 50 Nm).
Electrical installation
4.5 Connections
61