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

Wiring
4.11 Connecting the 24 V power supply
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:
Wiring example of wall-mounted converter Wiring example of motor-mounted 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 * Glanded variant Connector variant *
12 A + 12 A @ 2.5 mm
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" con-
nectors are used, the maximum current limit is 8 A + 8 A @ 1.5 mm
70
IEC-compliant cable
, 40 °C
2
, 50 °C (FSA)
2
, 55 °C (FSB)
2
UL-compliant cable
12 A + 12 A @ 13 AWG, 40 °C
12 A + 12 A @ 13 AWG, 50 °C
(FSA)
12 A + 12 A @ 13 AWG, 55 °C
(FSB)
Operating Instructions, 09/2020, FW V4.7 SP13, A5E48681219B
Glanded variant
8 A + 8 A @ 13 AWG, 40 °C
8 A + 8 A @ 13 AWG, 45 °C
6 A + 6 A @ 13 AWG, 48 °C
(16 AWG), 40 °C.
2
SINAMICS G115D distributed drive