PLCs & SCADA : Theory and Practice

PLCs & SCADA : Theory and Practice

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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 -


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