Subject: Re: [Shop-talk] Two SSRs from one PID controller

From: Pat Horne <[email-masked]>
Date: Fri, 2 Oct 2020 11:20:44 -0500

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If the problem with running them in parallel is the required current, you ca=
n always add a transistor to up the available current outside the PID.=20

Peace,
Pat

Pat Horne=20
We support Habitat for Humanity

On Oct 2, 2020, at 4:45 AM, Jeff Scarbrough <[email-masked]> wrote:

=EF=BB=BF
You can drive one off of the regular output, and another relay off of the Al=
arm output.  The alarm wouldn't be fancy controlled, but it's not clear what=
 the application is.

> On Thu, Oct 1, 2020 at 7:10 PM <[email-masked]> wrote:
> I want to operate two solid-state relays simultaneously (one for a 110V ci=
rcuit, the other for 220V) from a single PID. I had thought I would just wir=
e them in parallel from the PID, but a bit of poking around the interwebs su=
ggests 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=
!
>=20
> (I'm a chemist, so I understand electron flow and related, but I trust thi=
s little Shop Talk community more than I trust my electrical intuition!)
> Thanks!!!
>  Lee
> _______________________________________________
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">If the problem with running them in paralle=
l is the required current, you can always add a transistor to up the availab=
le current outside the PID.&nbsp;<div><br></div><div>Peace,</div><div>Pat<br=
><br><div dir=3D"ltr">Pat Horne&nbsp;<div>We support Habitat for Humanity</d=
iv><div><br></div></div><div dir=3D"ltr"><br>On Oct 2, 2020, at 4:45 AM, Jef=
f Scarbrough &lt;[email-masked]&gt; wrote:<br><br></div><div dir=3D"ltr=
">=EF=BB=BF<div dir=3D"ltr">You can drive one off of the regular output, and=
 another relay off of the Alarm output.&nbsp; The alarm wouldn't be fancy co=
ntrolled, but it's not clear what the application is.</div><br><div class=3D=
"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Oct 1, 2020 at 7=
:10 PM &lt;<a href=3D"mailto:[email-masked]">[email-masked]</a>&gt=
; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0=
px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style=
=3D"font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<div style=3D"margin:0px;padding:0px;font-family:monospace">I want to operat=
e two solid-state relays simultaneously (one for a 110V circuit, the other f=
or 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. S=
o I sketched up this drawing for two SSRs in series with a PID. Does this lo=
ok correct for this situation? Any suggestions appreciated!<br> <br> (I'm a c=
hemist, so I understand electron flow and related, but I trust this little S=
hop Talk community more than I trust my electrical intuition!)<br> Thanks!!!=
<br> &nbsp;Lee</div>
<div style=3D"margin:0px;padding:0px;font-family:monospace"><div>&lt;0905ec9=
6.png&gt;</div></div>
</div>
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