PLCs & SCADA : Theory and Practice
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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