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Home Brew Forums > Home Brewing Beer > DIY Projects > Other > Need help diagnosing wiring
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Old 10-26-2013, 11:09 PM   #1
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Default Need help diagnosing wiring

I have 2 issues I am trying to solve for.

First off...I am using an STC-1000 PID controller wired into a 25A SSR relay I have full 120V power coming in but I have nothing coming out of the SSR, the red LED is illuminated so I know that the PID is telling it to close. I currently have it wired with the hot coming from the PID into #3 and a neutral into #4. I have my hot coming off my terminal block into #2 and out to the heating element on #1. #1 is where I am getting no power.


Second question. I have a 3 wire RTD that I am trying to wire into the STC-1000. My goal with the RTD is this from The Electric Brewery. I get the double 'EE' alarm when I plug in any 2 or all 3 wires.

Help is appreciated.


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Old 10-27-2013, 12:13 AM   #2
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I think you have a couple things wrong here. First off, the STC-1000 isn't a PID, it's just a simple temperature switch. There's a bit more to a PID. Also, I believe it will only work with a negative temperature coefficient (NTC) thermistors; it won't work with an RTD. As for the relay, is it AC? If I'm reading the specs on your SSR correctly, it requires DC to trigger the switch; assuming you have the 120v AC model of the STC-1000, that might explain why it's not working.

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