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Date: Wed, 24 Jun 2009 09:20:19 -0700
Message-ID: <1c23473f0906240920n5587e3ddn4b9075bc1a85a8dc@mail.gmail.com>
Subject: Re: [FlyRotary] Relay Woes
From: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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I think I may have found the answer on page 10 here (although for a slightly
different relay).

http://www.components.omron.com/components/web/PDFLIB.nsf/0/77056031AB35222185257201007DD66B/$file/D20G3NA1205.pdf

If so, is that diode symbol reversed?  wouldn't that cause a short to
ground? Or do I need to install my pump so that the relay completes the
circuit to ground?  Aaah, yes, thats it... will require an extra wire out to
the pump (located in wing).  Still I dont really get it.

Dave Leonard

On Wed, Jun 24, 2009 at 8:34 AM, David Leonard <wdleonard@gmail.com> wrote:

> For you EE types, I have a question.   I am installing a smoke system and
> wanted to use a relay to control the pump.  I bought this relay from Mouser
> that I thought would do the trick:
>
>
> http://www.mouser.com/Search/ProductDetail.aspx?qs=sGAEpiMZZMtLEhJ5P%2fNsZ6bnrz6%2f%252b%252bJvA50eSiydqPQ%3d
>
> The problem is that if there is any load (like the pump or even the 0.02A
> indicator LED I installed, then the relay will not turn off when I turn off
> the signal voltage.  So either I do not understand how to use the relay, or
> I chose the wrong relay.  I have checked my wiring in-so-much as to confirm
> that the signal voltage does turn on and off with the switch, voltage across
> the 'LOAD" terminals does disappear when there is no load but not when there
> is a load (current).
>
> Is it possibly because this relay is designed for an AC load?  Other
> suggestions?
>
> --
> David Leonard
>
> Turbo Rotary RV-6 N4VY
> http://N4VY.RotaryRoster.net
> http://RotaryRoster.net
>



-- 
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

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I think I may have found the answer on page 10 here (although for a slightl=
y different relay).<br><br><a href=3D"http://www.components.omron.com/compo=
nents/web/PDFLIB.nsf/0/77056031AB35222185257201007DD66B/$file/D20G3NA1205.p=
df">http://www.components.omron.com/components/web/PDFLIB.nsf/0/77056031AB3=
5222185257201007DD66B/$file/D20G3NA1205.pdf</a><br>
<br>If so, is that diode symbol reversed?=A0 wouldn&#39;t that cause a shor=
t to ground? Or do I need to install my pump so that the relay completes th=
e circuit to ground?=A0 Aaah, yes, thats it... will require an extra wire o=
ut to the pump (located in wing).=A0 Still I dont really get it.<br>

<br>Dave Leonard<br><br><div class=3D"gmail_quote">On Wed, Jun 24, 2009 at =
8:34 AM, David Leonard <span dir=3D"ltr">&lt;<a href=3D"mailto:wdleonard@gm=
ail.com" target=3D"_blank">wdleonard@gmail.com</a>&gt;</span> wrote:<br><bl=
ockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, 204=
, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">

<div><div></div><div>For you EE types, I have a question.=A0=A0 I am instal=
ling a smoke system and wanted to use a relay to control the pump.=A0 I bou=
ght this relay from Mouser that I thought would do the trick:<br><br>
<a href=3D"http://www.mouser.com/Search/ProductDetail.aspx?qs=3DsGAEpiMZZMt=
LEhJ5P%2fNsZ6bnrz6%2f%252b%252bJvA50eSiydqPQ%3d" target=3D"_blank">http://w=
ww.mouser.com/Search/ProductDetail.aspx?qs=3DsGAEpiMZZMtLEhJ5P%2fNsZ6bnrz6%=
2f%252b%252bJvA50eSiydqPQ%3d</a><br>


<br>The problem is that if there is any load (like the pump or even the 0.0=
2A indicator LED I installed, then the relay will not turn off when I turn =
off the signal voltage.=A0 So either I do not understand how to use the rel=
ay, or I chose the wrong relay.=A0 I have checked my wiring in-so-much as t=
o confirm that the signal voltage does turn on and off with the switch, vol=
tage across the &#39;LOAD&quot; terminals does disappear when there is no l=
oad but not when there is a load (current).=A0 <br>


<br>Is it possibly because this relay is designed for an AC load?=A0 Other =
suggestions?<br><br>-- <br>David Leonard<br><br>Turbo Rotary RV-6 N4VY<br><=
a href=3D"http://N4VY.RotaryRoster.net" target=3D"_blank">http://N4VY.Rotar=
yRoster.net</a><br>


<a href=3D"http://RotaryRoster.net" target=3D"_blank">http://RotaryRoster.n=
et</a><br>
</div></div></blockquote></div><br><br clear=3D"all"><br>-- <br>David Leona=
rd<br><br>Turbo Rotary RV-6 N4VY<br><a href=3D"http://N4VY.RotaryRoster.net=
" target=3D"_blank">http://N4VY.RotaryRoster.net</a><br><a href=3D"http://R=
otaryRoster.net" target=3D"_blank">http://RotaryRoster.net</a><br>



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