Siemens SINAMICS S120 Device Manual page 79

In the following S120 Cabinet Modules, two further voltage taps are available to the
customer on the auxiliary power module for each voltage level:
● Smart Line Modules
● Active Line Modules
● Booksize base cabinets
● Motor Modules in chassis format
Description
The auxiliary power supply system installed in the Cabinet Module is used to distribute the
voltages provided by an auxiliary power supply.
Ideally, these voltages are generated by an Auxiliary Power Supply Module. Other ways to
supply power are to use option K76 "Auxiliary voltage generating unit in the Line Connection
Module" or to feed the auxiliary voltages to the auxiliary power supply system from an
external source.
The maximum load-carrying capacity of the auxiliary power supply system is 80 A according
to IEC (or 80 A according to UL). If the total power requirement of the cabinet line-up
exceeds the maximum load rating, the auxiliary power supply system must be divided into
segments and several infeed points selected.
The following diagram shows the mechanical design of the auxiliary power supply system.
The standard assignment with the three auxiliary voltages is shown in the tables below.
Figure 4-6
The auxiliary power supply system for an individual cabinet unit consists of an auxiliary
power module and the connecting cables.
Cabinet Modules NEMA
Manual, 04/2014, A5E03586450A
Auxiliary power supply system for voltage distribution
Electrical installation
4.5 Connections
79