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Dave,
this circuit is shows how to connect everything.
Actually, the relay in this picture control the ground leg of the load. So the
diode is in there the right way. If you want to control the +leg, you move the
relay to the other side of the load and connect the left sine to
ground.
However, is your relay is solid state, you would
want to follow the instruction in the data sheet.
Hope this helps.
Richard Sohn
N2071U
----- Original Message -----
Sent: Wednesday, June 24, 2009 11:20
AM
Subject: [FlyRotary] Re: Relay Woes
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%3dThe
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.nethttp://RotaryRoster.net
--
David Leonard
Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net
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