Let''s Talk Solid State Relays! (was: Newbie Advice/Solenoid Sequencing)
Archiver
Posts: 46,084
Solid-state relays generate heat, while a regular relay does not (except for
the coil). They also generally do not turn completely off -- you will have a
little bit of leakage, which could pose a shock hazzard. The benefit to
solid-state relays is they do not have contacts that spark, which would be
bad in a hazzardous environment. I would find some good quality plug-in
relays and sockets and use them. You could even get some smaller double-pole
relays and pair up the contacts to increase the load capacity. We used the
small, plug-in "ice-cube" relays on our equipment with no problem.
Original Message
> > If it was me, I would use some big solid state relays. They are
> > pricey, but they could interface directly with the stamp, and are
> > easy to replace.
>
> I am unfamilair with solid state relays. I've got a bunch of catalogues
> here, Jameco, Radioshack, Mouser, Digitech...and after taking a look
> they do appear rather intriging devices...and pricey to boot!
> If anyone has a more intimate knowledge of these units I'm all ears
> [noparse][[/noparse]you can also e-mail me @redirect@e... if you feel it is
> getting too far off topic].
> The SS relays appear too expensive for my budget BUT (!), in my initial
> rough and dirty thumbnail plans (which is still all I have to work with
> I need to evolve this area also), the Stamp is interfaced with a bank
> of (6) low powered DC relays connected to another bank of (6) 120VAC
> rated High Power relays plus all the attendant sockets, and misc.
> components. Perhaps an SS relay exists that can switch 6 seperate loads
> and it could end up being cheaper than the dual bank of hi/low relays
> (total of 12 in all!). Just the 6 high power relays alone w/sockets
> will cost $50.
the coil). They also generally do not turn completely off -- you will have a
little bit of leakage, which could pose a shock hazzard. The benefit to
solid-state relays is they do not have contacts that spark, which would be
bad in a hazzardous environment. I would find some good quality plug-in
relays and sockets and use them. You could even get some smaller double-pole
relays and pair up the contacts to increase the load capacity. We used the
small, plug-in "ice-cube" relays on our equipment with no problem.
Original Message
> > If it was me, I would use some big solid state relays. They are
> > pricey, but they could interface directly with the stamp, and are
> > easy to replace.
>
> I am unfamilair with solid state relays. I've got a bunch of catalogues
> here, Jameco, Radioshack, Mouser, Digitech...and after taking a look
> they do appear rather intriging devices...and pricey to boot!
> If anyone has a more intimate knowledge of these units I'm all ears
> [noparse][[/noparse]you can also e-mail me @redirect@e... if you feel it is
> getting too far off topic].
> The SS relays appear too expensive for my budget BUT (!), in my initial
> rough and dirty thumbnail plans (which is still all I have to work with
> I need to evolve this area also), the Stamp is interfaced with a bank
> of (6) low powered DC relays connected to another bank of (6) 120VAC
> rated High Power relays plus all the attendant sockets, and misc.
> components. Perhaps an SS relay exists that can switch 6 seperate loads
> and it could end up being cheaper than the dual bank of hi/low relays
> (total of 12 in all!). Just the 6 high power relays alone w/sockets
> will cost $50.