text: <s>[INST] KNX5100 Contactor Summary: connect a safety contactor on the power section without using STOHello. I am replacing an Old servo drive by a KNX5100 (2198-E1007-ERS).I want to turn on and off the safety contactor without the need of resetting an alarm or taking further action. Would you mind help me if: - connecting the power to a safety contactor - keeping the control module always powered - no breaking the STO wiring is this combination is correct? and will not harm the drive? any issuing of alarms that needs to be reset? many thanks for your help and support [/INST] If you're not breaking the STO wiring, you're missing the point of STO. I'm pretty sure there is a specification on the number of power cycles per hour that Kinetix drives should have; the STO circuit is there so you don't bump into that limit. You could potentially harm the drive with too many power cycles in too short a time. Use a safety relay in place of the safety contactor to control the drive STO circuit. As far as alarm/resets go, if the drive cannot be configured to self-reset after an STO event, you may have to add relays / PLC logic to do so. \\n </s>