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<font size=3>At 07:09 PM 10/1/2020, lee@automate-it.com wrote:<br><br>
>I want to operate two solid-state relays simultaneously (one for a
110V circuit,<br>
>the other for 220V) from a single PID. I had thought I would just
wire them in <br>
>parallel from the PID, but a bit of poking around the interwebs
suggests <br>
>otherwise. So I sketched up this drawing for two SSRs in series with
a PID. Does <br>
>this look correct for this situation? Any suggestions
appreciated!<br><br>
Lee,<br><br>
I don't know where you got the idea that putting them in parallel would
not work.<br>
Nor do I know if a PID is really the correct tool to use here.<br><br>
You don't really say what or why you are trying to control.<br><br>
In series, both solid state relays would have to close at the same time
to cause and both load would be energized. Not know what your are
trying to do, I'd <br>
think you'd want to be able to turn either one or off regardless of the
state of the<br>
other relay, which would require a seperate output line for each
ssr.<br><br>
You might be better off using one of the micro controllers like a
Raspberry pi controller, Arduino, or the BASIC stamp.<br><br>
John<br><br>
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<div>John T. Blair WA4OHZ email:
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