Dc Supply Voltage; General - Siemens SINAMICS S120 Equipment Manual

6.3 24 V DC supply voltage
6.3.1

General

The 24 V DC voltage is required for the power supply of
1. The electronics of the SINAMICS components via the integrated 24-V busbar
2. The electronics of the control units, option boards, sensor modules, and terminal
3. The load voltage of the digital outputs
4. The motor holding brakes
Other loads can be connected to these power supply units if they are separately protected
from overcurrent.
Notice
If other consumers are connected to the power supply, connected inductance devices
(contactors, relays) must be fitted with suitable overvoltage protection circuits.
Warning
Only protective extra-low voltages (PELVs) that comply with EN60204-1 must be connected
to all connections and terminals between 0 and 48 V DC.
The voltage tolerances of the motor holding brakes must be taken into account.
Booksize Power Sections
Equipment Manual, (GH2), 04.2004 Edition, 6SL3097-2AC00-0BP0
modules, as well as the process voltage of their digital inputs
Cabinet Configuration and EMC Booksize
6.3 24 V DC supply voltage
6-7