safely bypass STO Signal

Hi at all,

i'm developing a machine with 13 S120 (controlled by SIMOTION D445) but 2 of those can be optionals.

For the Safety switch unlock command i have to check that all the s120s are in STO status.

Is there a way to bypass the STO signals in a safe way when the 2 optionals drive are not installed?

Safety PLC: S7-1513F-1 

Physical hardware and some terminals used to send / receive the STO signals from those 2 drives, and then jumper across them until the drives are installed and commissioned.

Sipti97

Hi at all,

i'm developing a machine with 13 S120 (controlled by SIMOTION D445) but 2 of those can be optionals.

For the Safety switch unlock command i have to check that all the s120s are in STO status.

Is there a way to bypass the STO signals in a safe way when the 2 optionals drive are not installed?

Safety PLC: S7-1513F-1 

I'm using the safety integrated on the s120 not the wired ones

and when both the drives are not present also the power unit is missing.