Double Pole Double Throw Relay Diagram

Dp switches control two independent circuits and act like two identical switches that are mechanically linked.

Double pole double throw relay diagram.

Pole refers to the number of circuits controlled by the switch. Basically a double pole double throw relay is a electrometric relay which two common points 2 normally close and 2 normally open points. Sp and dp refer to single pole and double pole st and dt refer to single throw and double throw. Here pole indicates individual input circuit and throw indicates the output circuit.

This post is about the double pole double throw relay schematic diagram. Look at picture 1 1 and 1 2 it consists of two common input terminals c e and both mechanically tied together to operate in the. When the relay isn t powered both the red led and the dc fan are on. Place the relay s rated coil voltage on these terminals.

Sp switches control only one electrical circuit. This is the circuit below. Single pole double throw spdt relay contains two coil terminals and common terminal then two switching terminals n o normally open n c normally close if there is not enough dc supply in. Double pole double throw toggle has 2 input terminals and 4 output terminals.

When the relay is powered the red led and the fan shut off and the green led and the dc motor turn on. This is the diagram below to learn all the pin terminals of a double pole double throw dpdt relay. The other two terminals are often referred to as a and b. What do spst spdt dpst and dpdt mean.

When the switch is in one position the common terminal is connected to the a terminal so current flows from the common terminal to the a terminal but no. We re going to connect a double pole double throw relay to a circuit to light up leds. Fig 1 2 dpdt terminal diagram. 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.

But most frequently used relays are spdt relay and dpdt relay both are acts as electromechanical switch. 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. One of the terminals is called the common terminal.

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 2 coil terminals is where the voltage is placed in order to energize the coil. Dpdt double pole double throw.