The green wire on the left side sends power to the blue wire on the relay socket (Pin 30). The red wire is the battery power out to the fan (Pin 87) once the relay is energized. The black wire on the fan connector and socket (Pin 86) provides grounding for the relay and fan. The white wire attached to Pin 85 is the control circuit to the relay.. DPDT Relay Wiring Diagram. This is the diagram below to learn all the pin terminals of a Double Pole Double Throw (DPDT) Relay: The 2 COIL terminals is where the voltage is placed in order to energize the coil. Place the relay's rated coil voltage on these terminals. The polarity of the voltage does not matter.
There you have it. A relay circuit. Now these diagrams are known as relay logic or ladder diagrams. It's using relays to control the circuit and also the diagram will begin to take the shape of a ladder as the relay logic grows. It will continue downward as you will see later on. Now in the diagram below I have added a motor starter.. Get the FULL video transcript here: https://www.rspsupply.com/education/a-30-how-to-wire-a-relay/Want to see similar products to those featured in this video.