Self Latching Relay Circuit

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Self latching relay circuit.

This circuit or logic known as latching and unlatching circuit or logic. 5 0 out of 5 stars 1. An electrically latched relay is a standard relay with one of its own contacts wired into its coil circuit. Even after the input voltage is interrupted this relay maintains its set or reset condition until it receives the next inverting input.

Plc ladder diagram for latching and unlatched circuit program description. Relay latching circuit using push button we connect relay and push button as per figure. 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. Relays with lower resistance coils will need larger value capacitors and smaller value resistors.

It will work with other dpdt twin coil latching relays but the resistor and capacitor values may need to be adjusted to suit. 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. Here i demonstrate a circuit which is a simple asynchronous sr latch using a relay. The circuit as shown has been tested with the jaycar sy4060 relay.

Livisn dc 12v 10a 2 channel self latching relay module one button bistable switch one button start stop high level trigger. What is a latching relay. It is a relay that is set on orreset off by the input of a pulse voltage. Free shipping on your first order shipped by amazon.

When the push to make button is pressed 12v goes across the coil energising the relay. For this application we use s7 1200 plc and tia portal software for programming. We will write logic for water pump in network 1. 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.

It is also called a keep 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.