STO safety normative adherence
"Safe Torque Off" integrated safety function meets the following standard requirements:
safety integrity level SIL3 according to EN 61508 and EN61800-5-2
- Single contactor operation for Car stop EN81-1 §12.7.3 b)
- Contactor-less operation for Car stop EN81-1 and EN81-20 188.8.131.52.3 d)
Safe Torque Off function can be exploited specifically for Lift Market to support:
In case of activation or fault detection the safety function STO avoids torque production onto the
motor, which eventually could cause mechanical movements.