Self Latching Relay Circuit

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Self latching relay circuit.

Here i demonstrate a circuit which is a simple asynchronous sr latch using a relay. We can make this circuit or logic with relay also. What is a latching relay. 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.

5 0 out of 5 stars 1. Relays with lower resistance coils will need larger value capacitors and smaller value resistors. There are two kinds of latching relays. Even after the input voltage is interrupted this relay maintains its set or reset condition until it receives the next inverting input.

It will work with other dpdt twin coil latching relays but the resistor and capacitor values may need to be adjusted to suit. Plc ladder diagram for latching and unlatched circuit program description. We will write logic for water pump in network 1. 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.

For this application we use s7 1200 plc and tia portal software for programming. This circuit or logic known as latching and unlatching circuit or logic. The circuit as shown has been tested with the jaycar sy4060 relay. Relay latching circuit using push button we connect relay and push button as per figure.

An electrically latched relay is a standard relay with one of its own contacts wired into its coil circuit. Livisn dc 12v 10a 2 channel self latching relay module one button bistable switch one button start stop high level trigger. It is a relay that is set on orreset off by the input of a pulse voltage. It is also called a keep relay.

The diagram above shows how such a relay can be used to make a latching relay circuit the circuit has two buttons one is a push to make which closes when pressed but is otherwise open and the other is a push to break which opens when pressed but is otherwise closed. When the push to make button is pressed 12v goes across the coil energising the relay.