Analog limit alarm or comparator
Analog limit alarm or comparator
(OP)
I'm not sure of the best subforum to post this...
We are looking for a comparator, preferably DIN-rail mountable, that will turn on a digital output when a 0-10V analog signal reaches a certain configurable threshold. The goal is to turn a linear potentiometer into a switch so that we can interface to a digital input in order to save money, since digital inputs are much cheaper than analog inputs.
I have not found much at all, partly because I'm not sure what search terms to use.
I've found a few options from Phoenix Contact that are almost cheap enough, and have seen some fancier options from other manufacturers but these are much too expensive.
We are looking for a comparator, preferably DIN-rail mountable, that will turn on a digital output when a 0-10V analog signal reaches a certain configurable threshold. The goal is to turn a linear potentiometer into a switch so that we can interface to a digital input in order to save money, since digital inputs are much cheaper than analog inputs.
I have not found much at all, partly because I'm not sure what search terms to use.
I've found a few options from Phoenix Contact that are almost cheap enough, and have seen some fancier options from other manufacturers but these are much too expensive.
RE: Analog limit alarm or comparator
Phoenix Contact is the typical place to go for what you're looking for.
You may also find an in-the-panel knob to be less expected and an operational issue. Any chance you can ditch the whole analog thing and put a cheap magnetic switch somewhere to detect The Point as operationally everyone can "see" what's set and how it's expected to work.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Analog limit alarm or comparator
[img http://api-usa.com/pdf/api/api1000g-1020g.pdf]
I think Keith is right, that multiple input AI's are probably less expensive than multiple DC alarm modules, unless the Chinese are making 15USD versions.
RE: Analog limit alarm or comparator
RE: Analog limit alarm or comparator
Just today I found out my favorite supplier carries these. I was trying to remember where someone needed them. Your comment today was timely.
Analog_Input,_Relay_Output
And, they come with free 2-day shipping.
Keith Cress
kcress - http://www.flaminsystems.com