Wiring Diagram For Interposing Relay. The example relay diagrams below show how a relay works. How to read and understand the diagram of a safety relay.
Diagram 12 volt fuel pump relay wiring diagram full version. Why install an extra relay for a door holder. We will now look at wiring interposing relays to connect an npn and pnp sensors into the plc.
In addition to directly performing logic functions electromechanical relays may also be used as interposing devices between mismatched sensors controllers andor control devices.
Jun 22 2014. 1 master element 2 time delay starting or closing relay 3 checking or interlocking relay 4 master contactor 5 stopping device 6 starting circuit breaker 7 rate of change relay 8 control power disconnecting device 9 reversing device. Typical applications for alternating relays macromatic. The diagram above is the 5 pin relay wiring diagram.