What happens when relay 2 loses 12V power?
Trigger the circuit, Relay 2’s Normally Closed contact allows Relay 1 to activate, latching it from the 12V power source through Relay 1’s Normally Open contact. Circuit will stay on until 12V power is lost, or until Relay 2 is activated by grounding the coil through the Normally Open Button.
Do you need a NC button for a latching relay?
A simple latching relay circuit requires a NC button (or a NC/NO button or switch, one that has both states depending on how its pressed/switched). As Vlad has shown. There is also a latching relay that depends on Acc/On switched power, where it turns off once the car is turned off, and only turns on when you press the button when the car is on.
How does a latching relay work on a car?
As Vlad has shown. There is also a latching relay that depends on Acc/On switched power, where it turns off once the car is turned off, and only turns on when you press the button when the car is on. But if you add a second relay, you get the pulsed on, and NO button setup you want.
How does a pulse drive work on a relay?
Here’s a circuit that will work for you: When a pulse drives D1 the relay turns on. The first relay switch connects the coil to a +12V rail through SW1, that is a normally closed push button. The second switch gets closed too and can be used for any purpose.
How does the off function on a relay work?
Manual Switch Control— Use these functions to turn the relay on and off with a switch. Fixed On/Off— The on function keeps the relay on whenever input voltage is applied; it will only turn off if the voltage is removed. The off function keeps the relay in an off state, even if input voltage is applied.
How does turning on the pause input on a relay work?
Turning on a switch connected to the pause input stops functions until the switch is turned off. A switch connected to the reset input will start functions from the beginning. If the relay is actively receiving a signal, the function will restart right away.
How does a delay on break relay work?
The delayed switch-off (delay-on-break) function uses a switch instead of input voltage. When the switch is turned off, the relay remains on for a programmed amount of time before turning off.