I need a "resistance to voltage or current" device
I need a "resistance to voltage or current" device
(OP)
I need to make a test to verify correct parts are installed in an assembly. I'm looking for a correct motor voltage. I have verified that the different voltage motors we use have very different resistances across the leads.
I'd like a device then, that will turn a resistance value into a voltage or current that I can use as an analog input to a plc. I can then determine if it's the correct motor based on parameters that I set.
Has anybody ever used/seen/heard of a device to do this before?
Thanks!
I'd like a device then, that will turn a resistance value into a voltage or current that I can use as an analog input to a plc. I can then determine if it's the correct motor based on parameters that I set.
Has anybody ever used/seen/heard of a device to do this before?
Thanks!





RE: I need a "resistance to voltage or current" device
Gunnar Englund
www.gke.org
RE: I need a "resistance to voltage or current" device
You can do a Google for Wheatstone Bridge and find all the info you need, but in a nutshell, it is a bridge circuit using several known resistances and one unknown resistance (your motor winding), and a voltmeter. When the circuit is balanced (the resistance values are equal) the voltmeter reads 0 volts. Different unknown resistances will cause different voltage readings across the bridge.