Convert a 4-20ma signal to a dc voltage

[trimixdiver]

I need to convert a 4-20ma signal on a watlow to dc voltage to turn on and off a heating tape. Any simple way to do this?

 

[trimixdiver]

The controller is Watlow 945A-1FA2-A000 but it doent have the alarm output

And the DIN a Mite is DC21-60F0-0000

So now that I got off my A** and got you the numbers.

If I use the output (4-20ma) of the 945A to control the DIN A MITE, do I change the upper and lower limit to get it closer to my setpoint of 53deg? Please explain how I would set it up to give power to a heat pad to maintain 53deg in a 35deg enviroment.

Thanks

 

[itsmoked]

trimixdiver..

Hey that bugger does too have an alarm out! It doesn't have a SECOND OUTPUT... But it has a Dual, Mechanical Relay, rated at 6AMPs, Form A or B.

Power it up.
Mess with the LOW alarm setting. Set it to about 80F. It should go into LOW alarm immediately. Next grab the thermocouple, once your fingers heat it up to 80+ the alarm should clear. If this is what happens, get out your ohm meter and check out screws 24,25,26,26. Once you figure out the scheme try your heater with it. Watch your current limit tho.