So I currently have a drive run by a PSU. I have a thermal controller that will cut power to the drive when it runs over temperature but it doesn't latch off, so as soon as the drive cools a little it just turns back on. So I am trying to make a latching reset but I keep running into problems with the latch because the drive voltage needs to be 0 to 20 V. I have a crude diagram below.
I have looked up multiple latching switches using BJTs tried a relay with a push button and a 12 volt rectifier leeching off the thermal controller. Most fail when using the drive at low voltage sub 3 volts and burnt a few parts when going over the 20v.
Again I currently have it cutting the output to the PSU when it goes over temperature but I want it to stay off until manually reset in case I am not watching it or so it wont restart if I try to change something after it over-temperatures.
I am using a temperature controller model SlB4848-R2 and TDK-Lambda model UP36-6 power supply I would prefer to use those since I have. I also have access to a wide array of other common parts.
Thank you in advance for any of your advice I can post previous attempts I had if desired.
So I found a higher output op amp used as a compactor as the latch with a push button to trigger the relay. Would not have figured this out without user Transistor showing me CircuitLab made so much easier. The voltage divider is meant to both limit current and stop the input voltage from exceeding the op amp output.