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Jigar Vyas
10-21-2013 11:04 PM

Control panel cable wiring

Hi. In Control panel i am using 2 wire configuration for analog wiring. on one terminal we provide +24Vdc and other terminal we connect the cable from AI Channel. But i cant understand why there is an earth cabel connected to the third terminal? which commonly connected to Power supply earth. Is it required or is it a precaution? Pls reason it.