latching relay with input

Hi All,

Is there such a thing as a latching relay with a (-) input (i.e alarm arm/disarm). I want to break continuality on a wire when the alarm is armed and connect when disarmed. Thanks!

Yes, i have used a model by Altronix RBR1224.  this can use a + or - momentary pulse to latch and unlatch.

Will this 3 relay setup drain the battery in either latched or unlatched state?rsottawa

As it sits in the unlatched state it will not drain the battery It only does when a pulse is applied and the output is latched.John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

You can use what's called a bistable relay to switch it on or off without a constant power draw in either state; they just need a single pulse to change positions. They're pricier than regular monostable relays though, so depending on what you're looking to switch, you might be better off just using a transistor to turn your device on and off. Solid state devices won't draw power like relays do, and you can get them to handle pretty large currents.