Double Pole Double Throw Relay Schematic

One of the terminals is called the common terminal.

Double pole double throw relay schematic.

A positive and negative voltage can be placed on either end. Thus a double pole switch has three terminals. In order to know how to connect a dpdt relay you must know what each pin terminal represents and how the relay works. It has 2 terminals and 4 connectors and you can look at the dpdt relay as the equivalent of 2 single pole double throw spdt relays.

A double pole double throw relay comes with 8 terminal points. Here pole indicates individual input circuit and throw indicates the output circuit. How to connect a dpdt relay in a circuit. Single pole single throw normally open spst no form a single pole single throw normally closed spst nc form b single pole double throw spdt form c double pole double throw dpst no 2 form c.

A double pole double throw dpdt switch is a three selection electrical device in which there is one off and two on positions. Thus a double pole switch has three terminals. The dpdt relay double pole double throw is quite interesting and can be used in various scenarious including for changing the direction of a motor as you can see in the picture below. In the above double pole double throw relay schematic diagram.

An application for this switch is for reversing a direct current dc electrical motor. I shown a power relay with schematic diagram. Place the relay s rated coil voltage on these terminals. The polarity of the voltage does not matter.

It has 2 terminals and 4 connectors and you can look at the dpdt relay as the equivalent of 2 single pole double throw spdt relays. The following are industry accepted relay schematics and forms that gigavac uses for most of its relays. Also a 8 pin glass finder types relay with also a dpdt relay with diagram. A double throw switch connects an input terminal to one of two output terminals.

Double pole double throw toggle has 2 input terminals and 4 output terminals. In the diagram a1 and a2 is coil terminals of electromagnetic relay. Dpdt relay double pole double throw. This is the diagram below to learn all the pin terminals of a double pole double throw dpdt relay.

Change motor direction with dpdt relay as you can see in the schematic the 12v battery or use other voltages is connected with the plus at terminal t1 and minus at terminal t2. The motor s two power leads are reversed at one of the switches screw terminals. The 1 terminal is common which is normally close with 2 and normally open with 3. Fig 1 2 dpdt terminal diagram.