Connecting To The 24 V Power Supply Using Daisy Chain - Siemens SINAMICS G115D Operating Instructions Manual

4.11.2

Connecting to the 24 V power supply using daisy chain

The SINAMICS G115D system has been designed to allow a converter to provide the 24 V DC
power for a number of converters in a daisy chain.
The figure below exemplifies the methodology for daisy-chaining multiple converters:
Wiring the 24 V power supply terminals for the glanded variant
The figure shows an example of wiring the 24 V power supply terminals for the daisy-chain
connection for the glanded variant of the converter:
Maximum current limit for daisy-chain connection
The maximum permissible number of daisy-chained converters depends on the maximum
current limit for daisy-chain connection. The table below gives the maximum current limits
dependent upon the cable cross-sections and surrounding air temperature:
Connector variant
12 A + 12 A @ 2.5 mm
12 A + 12 A @ 2.5 mm
The values in the table above are valid when connecting with M12 L-coding connectors. If 7/8"
1)
connectors are used, the maximum current limit is 8 A + 8 A @ 1.5 mm
For wall-mounted converter FSA, the maximum surrounding air temperature is 50 °C.
2)
Further information
If you don't use daisy chain connection, cover the unused connectors with the optional
connector cover kit to maintain the IP rating of the system.
SINAMICS G115D distributed drive
Operating Instructions, 12/2020, FW V4.7 SP13, A5E48681219B-002
Wall-mounted converter
IEC-compliant cable
Glanded variant
1)
, 40 °C
2
, 55 °C
2 2)
Connector cover kit (Page 33)
4.11 Connecting the 24 V power supply
Motor-mounted converter
UL-compliant cable
Connector variant
1)
12 A + 12 A @ 13 AWG, 40 °C
12 A + 12 A @ 13 AWG, 55 °C
Glanded variant
8 A + 8 A @ 13 AWG, 40 °C
8 A + 8 A @ 13 AWG, 45 °C
2)
6 A + 6 A @ 13 AWG, 48 °C
(16 AWG), 40 °C.
2
Wiring
75