Should the stop PB be NC or No in ladder diagram???Some say it's should be NC so that the system can stop even in the event of wire break in stop PB circuit.
Physically stop /emergency stop should wiring with NC not the NO. when the cable is cut or any looseness connection there then the signal will be false. So physical NC connection means 24v is going to the module.In the module 24v means it's a logical 1. So if you use NO in ladder it will be NC by that logical 1. Hope you understand.
Thank sir
Should the stop PB be NC or No in ladder diagram???Some say it's should be NC so that the system can stop even in the event of wire break in stop PB circuit.
Physically stop /emergency stop should wiring with NC not the NO. when the cable is cut or any looseness connection there then the signal will be false. So physical NC connection means 24v is going to the module.In the module 24v means it's a logical 1. So if you use NO in ladder it will be NC by that logical 1. Hope you understand.
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