[Shop-talk] Two SSRs from one PID controller

[John Innis]

We need a little more info.  What is your PID output rated at (volts,
amps).  What are your SSR input requirements (volts amps).  Are you doing
true proportional or a bang/bang approximation?

On Thu, Oct 1, 2020 at 6:10 PM <lee at automate-it.com> wrote:

> I want to operate two solid-state relays simultaneously (one for a 110V
> circuit, the other for 220V) from a single PID. I had thought I would just
> wire them in parallel from the PID, but a bit of poking around the
> interwebs suggests otherwise. So I sketched up this drawing for two SSRs in
> series with a PID. Does this look correct for this situation? Any
> suggestions appreciated!
>
> (I'm a chemist, so I understand electron flow and related, but I trust
> this little Shop Talk community more than I trust my electrical intuition!)
> Thanks!!!
>  Lee
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