Electrical Connection; Connecting The Dc-Link Busbars And 24 V Busbars - Siemens SINAMICS S120 System Manual

High Frequency Modules

4.6 Electrical connection

4.6 Electrical connection
4.6.1

Connecting the DC-link busbars and 24 V busbars

1. Connect the DC link busbars of the HF modules the same as for standard booksize
components.
2. Connect the 24 V busbars using the red 24 V connector provided in the accessories pack.
3. Mount the side cover for the DC link at the first and last component of the drive line-up.
Danger to life as a result of electric shock when connecting hazardous voltages to the 24 V
busbars
When a hazardous voltage is connected to the 24 V busbars, you can suffer death or
severe injury when coming into contact with the busbars.
• Only connect safety extra low voltages (PELV or SELV) to 24 V busbars.
Additional information and diagrams can be found in the SINAMICS S120 Manual for
"Booksize Power Units" (Chapter: Electrical connection for Line Modules and Motor
Modules).
Tightening torque of the screws
The tightening torque for DC link busbar screws is 1.8 Nm (tolerance: +30 %).
NOTICE
Material damage due to loose DC link connections
Insufficient tightening torques can result in faulty electrical connections. This can result in
damage due to fire or malfunctions.
• Check the correct tightening torque of the DC link busbar screws (1.8 Nm) before
• Check the screws at terminal connections, e.g. DC link busbars and motor terminals
62
WARNING
commissioning with the system disconnected from the power supply and the DC link
fully discharged.
after transport or at the latest after every 5 years. If necessary, retighten the screws.
System Manual, (SH2), 04/2015, 6SL3097-4AH10-0BP3
High Frequency Drive