Dc Supply Voltage; General - Siemens SINAMICS S120 System Manual

Cabinet design and EMC
12.3 24 V DC supply voltage
NOTICE
Damage to the device and malfunctions as a result of static discharge
If static discharge occurs on surfaces or interfaces that cannot be easily accessed, this can cause
defects and/or malfunctions.
• Only touch components, modules, and devices when you are grounded by one of the
12.3 24 V DC supply voltage
12.3.1

General

The 24 V DC voltage is required to supply:
• The electronics of the SINAMICS components via the integrated 24 V busbar
• The electronics of the Control Units, option boards, Sensor Modules, and Terminal Modules,
as well as the process voltage of their digital inputs
• The load voltage of the digital outputs
Note
The electronic power supply has to be provided by the user as described in Chapter System data
(Page 34).
When connecting a DC power supply as specified in EN 60204-1:1997, sect. 4.3.3, malfunctions
may occur due to the voltage interruptions permitted for them.
Hazardous voltage when an unsuitable power supply is connected
Death or serious injury can result when live parts are touched in the event of a fault.
• For all connections and terminals of the electronic boards, only use power supplies that
NOTICE
Damage to further loads due to overvoltage
Overvoltage from switched inducted loads (contactors, relays) can damage connected loads.
• Install suitable overvoltage protection circuits.
172
following methods:
– Wear an ESD wrist strap
– Wear ESD shoes or ESD grounding straps in ESD areas with conductive flooring
WARNING
provide SELV (Safety Extra Low Voltage) or PELV (Protective Extra Low Voltage) output
voltages.
High Frequency Drive
System Manual, 10/2020, 6SL3097-5AH10-0BP0