
JB2020 (Customer) asked a question.
I have always used the +24V STO Terminal and ran a wire from it to a safety relay and back t the STO1 and STO2 Terminals. The manual shows using an external supply which utilizes the SCM Terminal and doesn't use the +24V Terminal. Is this an either/or situation or is one option better than the other?
Good afternoon, Appendix E, page 2 has the STO wiring descriptions. The 24+ vdc is only used to disable the STO function.
The TUV validated configuration for the STO function is to wire the drive to a Safety PLC or Safety Relay it as shown in the diagram. Any other wiring configurations will not meet the TUV STO approval for this drive.