Not certain, Dave.
If it were a mechanical relay then it would be fairly easy to
say “yes’ or “No” – solid state is a bit more complex. However, I am
inclined to believe that when they specify AC voltage on the controlled side
that they might mean it. Here are two relays from FuturLec that look
identical. Note that the first one implies the load should be AC voltage
while controlling voltage is DC. Then notice the next photo for DC/DC
relay.
This at least implies to me that perhaps with solid state
relays – it may be significant whether you specify DC on the controlled side as
to whether the solid state relay functions. For instance it might require
the voltage to be alternating and would see DC voltage as no-voltage?
They can be found at:
http://www.futurlec.com/RelSS.shtml
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
On Behalf Of David Leonard
Sent: Wednesday, June 24, 2009
12:20 PM
To: Rotary motors in aircraft
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%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