chuckjaxfl
Well-Known Member
Does anyone know a source for normally closed SSR's?
Does anyone know a source for normally closed SSR's?
You need to be more specific. What are you switching and what is your input.
Use something like a SPDT reed relay to power the SSR through the NC contacts. When you then energize the reed relay, it will break the circuit to the SSR.
Search for MOSFET form B SS relays, made by many manufacturers.
MOSFET's are DC devices, also available for AC switching.
Cheers,
ClaudiusB
That's plan B, but I was hoping to keep the control solid state.
That's plan B, but I was hoping to keep the control solid state.
Which ones, any part numbers?SSRs are usually normally closed. Apply power and they open.
Which ones, any part numbers?
The SCR output type is a NO device.
Cheers,
ClaudiusB
Pretty much all relays I've seen on ebay for example.
I'm using these:
http://cgi.ebay.com/Solid-State-Rel...837?pt=LH_DefaultDomain_0&hash=item230b073425
Pretty much all relays I've seen on ebay for example.
I'm using these:
http://cgi.ebay.com/Solid-State-Relay-SSR-24-480-VAC-40A-Heat-Sink-/150508876837?pt=LH_DefaultDomain_0&hash=item230b073425
hrafnkell sorry for answering so late, but I am recovering from my second Oktoberfest and I was in charge this time.Pretty much all relays I've seen on ebay for example.
...Why not get a 120 volt reed relay....
chuckjaxfl,
did you find a suitable nc relay? I'm in the same position, looking to ensure both elements can't be on together. Since it's fed from and controlling and SSR signal, the relay only has to take 12V and a few milliamps.
I found plenty of reed relays, but all DIL/SIL. Ideally I'd like something that I can mount on the panel backplane.
what did you end up using?
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