A latching relay is electrically set to one position and it remains latched in that position until it is electrically reset to the opposite position.
Self latching relay circuit.
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We will write logic for water pump in network 1.
When we press push button supply goes to relay a1 point and relay gets on and its contact changes but when we release push button supply cutoffs and relay gets off.
Here i demonstrate a circuit which is a simple asynchronous sr latch using a relay.
This circuit or logic known as latching and unlatching circuit or logic.
The circuit as shown has been tested with the jaycar sy4060 relay.
What is a latching relay.
We can make this circuit or logic with relay also.
An electrically latched relay is a standard relay with one of its own contacts wired into its coil circuit.
Relays with lower resistance coils will need larger value capacitors and smaller value resistors.
It is also called a keep relay.
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Livisn dc 12v 10a 2 channel self latching relay module one button bistable switch one button start stop high level trigger.
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Plc ladder diagram for latching and unlatched circuit program description.
It will work with other dpdt twin coil latching relays but the resistor and capacitor values may need to be adjusted to suit.
They are easy to understand you can see them working and they are still in use today in many many systems to switch voltage into circuits to.
There are two kinds of latching relays.
Relay latching circuit using push button we connect relay and push button as per figure.
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When the push to make button is pressed 12v goes across the coil energising the relay.
It is a relay that is set on orreset off by the input of a pulse voltage.