Surrette - Relay Coil Incompatibility [RE-wrenches]

[John Raynes]

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Drake,

Have you tried AA Electric?  They have a pretty extensive line of Omron 
relays, and on page 8-20 of their current catalog they have a bunch of 
DIN-Rail mount relay socket accessories.  I only started noticing these 
types of Din-rail sockets recently, and it looks like some of the models 
allow for the mounting of PC Board relay types.  That might be an option 
for you to use Omron PC Board relays - I couldn't tell from a quick glance 
whether or not they have these types of sockets for all of their relays.

Their web site is www.a-aelectric.com.  They only have their product 
catalog on the web in PDF download formats, not as interactive web 
pages.  The relay catalog section is about 1.7MB.

Hope this helps,

John Raynes
RE Solar
Torrey, UT



At 12:27 PM 12/16/04 -0700, you wrote:

>A design problem has recently cropped up using Surrette batteries that 
>hasn't been a problem with other brands of battery.  This is one that 
>could lead to unexpected system failures, especially in systems where 
>Surrette batteries are retrofitted.
>
>I had planned to use Idec relays with 24 VDC coils to control a 
>generator.  The difficulty I've come across is that the coils have a 
>tolerance of 30 VDC (less according to some) while the Surrette batteries 
>need to be equalized at up to 32 VDC.  Other brands of relays have the 
>same issue.
>
>While looking for a 24 volt relay with a higher coil tolerance, I did find 
>one from Omron that can go up to 36 VDC.  That is great.  The problem is 
>that it is made to be used as a component to solder into a circuit board, 
>so it does not have a base or socket that is available for it.
>
>The relay is a small unit, so it would be awkward soldering the wires on 
>to the small pins.  If worst comes to worst, I might do that, and pot the 
>pins in silicone and wrap with tape.  That is a pretty Mickey Mouse 
>approach that I'd rather avoid.  Or, maybe it can be mounted to a small 
>chunk of circuit board, which can be mounted to the enclosure, using 
>standoffs.  Again, It sounds like a pain and could be a potential problem 
>with inspectors.
>
>Does anyone know of a source of relays with 24 volt coils, with a 
>tolerance of at least 32 VDC that is designed to plug into a base or socket?
>
>Thanks in advance.
>
>Drake

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