2-wire ac NC proximity sensor - PLCS.net

WrongWay · June 13th, 2011, 02:34 PM

These are not used very often I know. I do not have a PLC on this piece of equipemnt that I am attempting to install a monitoring/alarm circuit in. My intent is to use this prox to monitor for weld wire presence and to switch the load to a timer relay when no wire is detected. When the relay times out at 11 seconds it will latch a relay that sounds/lights an alarm condition that requires a key reset to unlatch. I installed the prox using a micro qd with #3 suppling load(120VAC) and #2 to the timer relay. Sometimes the prox doesn't light at all and other times after cycling power I have gotten a flash on/off from the red LED indicating a short circuit. Also, the micro qd cable I have the red/white to load and the red/black to the relay
How far off the track am I?

June 13th, 2011, 02:34 PM	#1
WrongWay Member Join Date: May 2011 Location: Sturgis,Mi Posts: 31	2-wire ac NC proximity sensor These are not used very often I know. I do not have a PLC on this piece of equipemnt that I am attempting to install a monitoring/alarm circuit in. My intent is to use this prox to monitor for weld wire presence and to switch the load to a timer relay when no wire is detected. When the relay times out at 11 seconds it will latch a relay that sounds/lights an alarm condition that requires a key reset to unlatch. I installed the prox using a micro qd with #3 suppling load(120VAC) and #2 to the timer relay. Sometimes the prox doesn't light at all and other times after cycling power I have gotten a flash on/off from the red LED indicating a short circuit. Also, the micro qd cable I have the red/white to load and the red/black to the relay How far off the track am I? __________________ John In the land of plenty, conservation is a foreign word.

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