8.32 Line contactor control
Overview
A line contactor disconnects the converter from the line supply, and therefore reduces the
converter losses when the motor is not operational.
Requirement
The line contactor control requires a 24 V power supply from the converter. The 24 V power
supply must be maintained, even when the line contactor is open.
Function description
The converter controls its own line contactor using a digital output.
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Figure8-80 Line contactor control via DO0 with feedback signal via DI3
Activating the line contactor control
Connect the digital output that controls the line contactor with signal r0863.1.
Example for DO0: p0730=863.1.
Line contactor control with feedback signal
Interconnect p0860 with the signal of the corresponding digital input.
• p0860= 722.x: Feedback signal of an NO contact via DIx
• p0860= 723.x: Feedback signal of an NC contact via DIx
Advanced commissioning
8.32Line contactor control
SINAMICS G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK 355
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