Description
3.3 Accessories
Installation and Operating Instructions SINAMICS G180
Operating Instructions, 02/2019, 4BS0751-007
43
3.3.2.4
"Safe torque off" with two circuit version
In the inverter, you can also initiate the "Safe torque off" function using two safety circuits.
You must connect one circuit as NC contact at terminals -X2:19/:20 (just the same as for a
single-circuit trip). You must connect the second circuit as NC contact at terminals -X2:24/:3.
NOTICE
Malfunctions
Carefully ensure that the "Safe torque off" function in the inverter is configured for a two-
circuit trip.
3.3.2.5
Switchover, single circuit <-> two circuit tripping
The safety-related "Safe torque off" function in the inverter is purely based on a hardware-
related shutdown of the power section. The corresponding input circuits only act on the two
shutdown paths in the inverter via the hardware circuit.
NOTICE
Bail switch S3
Just bail switch S3 on peripheral board DI/DO determines whether the "Safe torque off"
function is initiated through one or two channels.
The software is not relevant for the safety analysis. It only serves to provide display and
information relating to the "Safe torque off" function. However, in order to commission the
inverter, you must appropriately set parameter "P-INVERTER DATA/STO".
