Re: 24 Volt 1-Wire dry contact relay??

Should the diode be connect across the relay load or the
relay coil?

Thanks,

   - Matt


Kelly Smith wrote:

> All - And be sure to add a "back-EMF kickback" diode strapped across the
> relay, or you will blow out the DS2406 on the 8x1-Wire board (cathode goes
> to the relays +V).
> 
> Best regards, Kelly Smith
> 
> -----Original Message-----
> From: tini-admin-6tN4nzCoH/[email protected] [mailto:tini-admin-6tN4nzCoH/[email protected]]On Behalf Of
> Bruce Boyes
> Sent: Wednesday, June 23, 2004 9:59 AM
> To: Joel Rowley
> Cc: tini-6tN4nzCoH/[email protected]
> Subject: Re: [TINI]24 Volt 1-Wire dry contact relay??
> 
> 
> At 06:52 PM 6/22/2004 -0400, Joel Rowley wrote:
> 
>>Hey List,
>>
>>I am looking for a 24 Volt 1-Wire dry contact relay.  What I mean by this
>>
> is
> 
>>that the relay can handle 24 volts going through it, not that the relay is
>>powered by 24 volts.  Do any of you know if there is something like that
>>
> out
> 
>>there or not?
>>
> 
> You can purchase these at DigiKey and connect them to an 8x1 Wire board as
> long as the relay coil can be powered by 12 volts or less at 50 mA or less
> so that it can be driven by PIOA from a DS2406.:
> http://www.systronix.com/expansion/8x1wire/81w.htm
> and
> http://www.systronix.com/expansion/8x1wire/DS2406_relay_drive.pdf
> 
> Regards
> 
> Bruce
> 
> 
> 
>>Thanks!
>>Joel Rowley
>>
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> 
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