Siemens Terminal for F-DI 8×24VDC HF

[iadapt]

Hello,

I am troubleshooting a fault on a Terminal assignment for F-DI 8×24VDC HF. Terminal 15 says its a; VSn: Internal sensor supply, channel n.

What does that mean?

I have a circuit going from 15 to 6 with an estop in the circuit.

Thanks

 

[boneless]

The power supply for the DI's comes from the module itself.

Page 13:
https://cache.industry.siemens.com/...t200sp_f-di_8x24vdc_hf_manual_en-US_en-US.pdf

 

[iadapt]

Thanks, boneless.