24 V Power Supply And Connection Of Components - Siemens SINAMICS S120 System Manual

Cabinet design and EMC
11.3 24 V DC supply voltage
11.3.2

24 V power supply and connection of components

Active Line Modules booksize, HF modules and DC link components are connected to the 24
V DC power supply via the integrated 24 V DC busbars. The current carrying capacity of
these busbars is 20 A.The 24 V supply can be realized in various ways:
Using a Control Supply Module
When a Control Supply Module is used, the 24 V supply can be directly established via the
busbars. The electronic current limiting function integrated in the Control Supply Module
protects the busbar system when a fault occurs. Additional loads can be connected via the
24 V terminal adapter.
Note
When using cables with a cross-section of 2.5 mm
the 24 V side if a type XLPE or EPR cable, or a cable with a similar quality and with a
thermal stability of up to 90 °C is used.
Using a SITOP Power modular 20 A
When using a SITOP Power modular 20 A, the 24 V terminal adapter must be used. The
SITOP Power module should be located very close to the load (max. cable length 10 m). We
recommend using miniature circuit breakers with tripping characteristic D as overcurrent
protection devices for the cables and busbars.
Using an external 24 V power supply
When using an external 24 V power supply, the 24 V terminal adapter must be used. The
external power supply should be located very close to the load (max. cable length 10 m). A
SITOP Select module, type 6EP1961-2BA00, must be used as overcurrent protection device
for the cables and busbars.
Using the red 24 V connectors
● A 24 V connector should be inserted onto the 24 V busbar between each Active Line
Module booksize, HF Motor Module, HF Choke Module, HF Damping Module and DC link
component.
● Attachment and removal are only permissible in a de-energized state.
● A maximum of 5 unplugging and plugging cycles is permissible.
Note
The red 24 V connectors must be attached before the drive line-up is commissioned.
168
, no additional protection is required on
2
System Manual, (SH2), 04/2015, 6SL3097-4AH10-0BP3
High Frequency Drive