I am trying to set up a circuit where a "switch" is locked into closed from "NO" using 12 vdc trigger. Once the "switch" is closed, it would take another 12 vdc to return to the "NO" position. The return could also be accomplished with a manual button.
I have been searching and found self latching relays and that looks like what I want, but they seem to either have wireless or buttons for activation.
There are also "bistable" and others that do not list as "bistable". I have no idea what that means.
I am trying to latch a small circuit (5 vdc 200ma) closed and then later reset to the normally open when I am done with my process. I want to trigger the relay with 12 vdc. It stays in the latched position (closed) without power applied. Power interruptions would have no effect on the circuit.
The small circuit (5 vdc 200ma) is part of a logic control in a PLC where it is an Exit Condition if "On". Basically, I have several Steps in a Process and have been manually turning a Toggle Switch "On" and close the circuit when part of the Process is complete. If that part of the Process is complete, a Power interruption would cause the Process to re start automatically at Step 1. If step 1 is complete and the logic Toggle is closed, the Process Jumps to State 2. I have several steps and need a board that has at least 6 latching relays. My quandary is that I cannot find instructions on how these boards work. It seems that many have buttons for activation, but that would do me no good as I already can manually turn on the Toggle. Some talk about adding a trigger switch but give no additional information. I want it automated and can logically apply a 12 vdc trigger when the Step is complete. Can someone point me to a relay board that would do what I want?