Re: X-10 Appliance modules- more than just a relay?

["Steve Morgan" <steve@xxxxxxx>]

Keith,

I'm going to stop talking now, because I seem to be repeating everything
you
say but 15 seconds later!!

:-)

Steve

-----Original Message-----
From: Keith Doxey [mailto:keith.doxey@xxxxxxx]
Sent: 31 January 2000 10:05
To: ukha_d
Subject: [ukha_d] Re: X-10 Appliance modules- more than just a relay?


John,

Lamp modules and Appliance modules do not need the leakage to pick up the
X10 signal as they have a direct connection to Live and Neutral.

The modules that MUST have a leakage current to work are the ones WITHOUT a
neutral connection, eg Wallswitches which only connect to Live and Load.

Your other comment regarding leakage from dimmers is correct. Lutron (and
some other companies)incorporate a relay to give the total disconnection
when the circuit is off. One big advantage of this method apart from the
increased safety factor is that in the event of a blown triac it is still
possible to turn the light off.

Keith Doxey
http://www.btinternet.com/~krazy.keith
Krazy Keith's World of DIY Home Automation


-----Original Message-----
From: Dr John Tankard [mailto:jtankard@xxxxxxx]
Sent: 31 January 2000 09:42
To: ukha_d@xxxxxxx
Subject: [ukha_d] Re: X-10 Appliance modules- more than just a relay?



>
> I realise the nightlight doesn't need much power (about 200mW if my
> calculations are right), but if it's just a relay in the appliance
module,
> it shouldn't even get that.
>
This applies to all X10, in order to pick up the X10 signal there has to be
a small leakage even when the device is off. Dont stick your fingers in the
lamp holder !

This also applies to homebuilt dimmers using triac's to be safe you really
need a traditional relay in series to remove the risk, but this adds cost.

John.


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