A 24V HVAC relay wiring diagram shows the connections for controlling the HVAC system using a relay. The diagram illustrates the specific wiring arrangement for efficient operation. When setting up an HVAC system, understanding the relay wiring diagram is crucial for proper installation. By following the wiring instructions accurately, you can ensure the relay functions […]. Figure 10. 5 Pin Relay Wiring Diagram. 1, 2 are coil terminals, 3 is a common contact, 4 and 5 are normally open and normally closed contacts respectively. In the initial state, contacts 3 and 5 are turned on, and load 5 works. After the coil power is supplied, 1 and 2 are turned on, the coil is energized, and the common contact of 3 is.
![[DIAGRAM] Contactor Relay Coil Diagram](http://www.trainelectronics.com/artcles/DualCoilRelayOnceAround/images/Diagram_2.gif "[DIAGRAM] Contactor Relay Coil Diagram")
When wiring a relay, check the wiring diagram first and identify its terminals. Then, wire the relay terminals and complete the rest of the circuit accordingly. Here are the steps:. Reed relay: Coil voltage of 5VDC (up to 24V in through-hole PCB versions); coil resistance 500-2000 ohms; contact rating up to 0.25A at 100V... So when wiring up these relays, the coil wire's will connect to pins 2 & 7 on the socket. One Pole Has: Pin's 1 & 3 as Normally Open Pin's 1 & 4 as Normally Closed. The Other Pole Has: Pin's 8 & 6 as Normally Open Pin's 8 & 5 as Normally Closed. See my Switch Terminology Page for more on contact arrangements if you need to.