(dual make single pole single throw relay) an electromagnetic switch, consist of a coil (terminals 85 & 86), 1 common terminal (30), and two normally open terminals (87 and 87b).
2 pole double throw relay.
These are the terminals where you apply voltage to in order to give power to the coils (which then will close the switch).
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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.
Double pole double throw (dpdt) relay contains two coil terminals, two separate common terminals c1, c2 and two normally open (n/o1, n/o2), two normally close (n/c1, n/c2) terminals, this relay makes two different connection and control with one control signal to.
Place the relay's rated coil voltage on these terminals.
Each of the terminals of a double pole double switch can either be in 1 of 2 positions.
Double pole double throw relay a double pole double throw (dpdt) is a relay that has 2 inputs and 4 outputs.
The terminals are coil, coil, com, com, no, no, nc, nc.
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 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.
Each input has 2 corresponding outputs that it can connect to.
That is, a common terminal connects to either of two others, never connecting to both at the same time.
The relay i'm working with is this one.
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The 2 coil terminals is where the voltage is placed in order to energize the coil.
Generally 2 spdt switches which can regulate two separate circuits but are always switched together by a solitary actuator.
The double pole single throw dpst relay is the equivalent of 2 spst switches (no normally open and nc normaly closed) and can be used to switch 2 different loads.
The 2 coil terminals is where the voltage is placed in order to energize the coil.