Auxiliary Voltage Busbar System - Siemens SINAMICS S120 Equipment Manual

5.8.7

Auxiliary voltage busbar system

Description
The auxiliary voltage busbar system is used to distribute the available voltages (line voltage
for device fans, 230 V AC, 2-phase and 24 V DC). The table below shows an overview of the
connected voltages and associated fuse protections for the auxiliary voltage busbar system
in the Auxiliary Power Supply Module. The 24 V DC voltage is provided directly from the
SITOP power supply and is not protected separately by a fuse. The 24 V DC power supply
itself is current-limited and short-circuit-proof at the output.
Note
The 24 V DC voltage is available only via the auxiliary voltage busbar system.
The assignment of the auxiliary voltage busbars is described in the chapter "Electrical
installation", section "Connections/auxiliary voltage busbar system".
Table 5- 67
Order no. 6SL3700-
Fuse protection in A
380 ... 690 V 2 AC (depending on
the rated device voltage)
230 V 1 AC
24 V DC
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A
Overview of the fuse protection for the auxiliary voltage busbar system in the Auxiliary
Power Supply Module
0MX14-0AA0
5.8 Auxiliary Power Supply Modules
0MX16-3AA0
63 80
6 10
20 40
Cabinet Modules
0MX21-0AA0 0MX21-4AA0
100 100
10 20
80 80
229