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