Siemens SINUMERIK 840D sl Commissioning Manual page 121

4. Select "Next step >".
Use a line contactor to ensure galvanic isolation of the drive line-up and the DC link from the
line supply.
The checkbox for the infeed is selected by default. This means that the BICO
interconnection (ON/OFF, both directions) is set with the initial commissioning in
accordance with the default setting. Activate the checkbox in order to restore the default
setting for the terminal wiring.
If you use an external line contactor in front of the infeed, you can control it automatically via
SINAMICS. To do this, set the checkbox to activate the "SINAMICS internal line contactor
control" function.
Control via the PLC is also possible as an alternative. The connection is made via the
reserved terminals displayed.
– X132.12: Output terminal infeed for line contactor control
– X132.4: Input terminal infeed for line contactor feedback signal
It is not possible to internally control the line contactor using a drive object on the NCU, as
the line contactor must be controlled from an external PLC or hardware control.
CNC Commissioning: NC, PLC, Drive
Commissioning Manual, 12/2019, A5E48312804B AA
Commissioning NC-controlled drives
6.3 Guided commissioning of SINAMICS drives
121