funguy123
Electrical
- Apr 12, 2005
- 19
I have a Phoenix Contact 24VDC Solid State Relay that I have a Sick Optic Photoeye wired to that is PNP. The contacts of the relay are switching 0VDC to the input of a PLC wired for sinking. The sensor is activating the relay transistor and is working fine. My issue is whether the Photoeye is ON or OFF the input to the PLC is always on. I am switching 0VDC through the relay into the PLC.
Is this leakage current? I can replace it with a mechanical relay but I want to learn what the problem is so I don't do this again. The PLC is a Yaskawa MP940 motion controller. The wiring has been verified.
Thanks in advance,
Greg
Is this leakage current? I can replace it with a mechanical relay but I want to learn what the problem is so I don't do this again. The PLC is a Yaskawa MP940 motion controller. The wiring has been verified.
Thanks in advance,
Greg