Delay-Off Timer (TOF) Relay In this case, at the instant power is applied to the relay coil, the contacts activate that is, the N/O contacts close, and the N/C contacts ... In our diagram, the left rail is wire number 2 and the right rail is wire number 1.
|Title||:||PLCs & SCADA : Theory and Practice|
|Author||:||Rajesh Mehra, Vikrant Vij|
|Publisher||:||Laxmi Publications -|