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Douggg

X-10 Appliance Relays Can't Be Used For Leds.

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I'm using appliance modules (the ones with relays) so I have full on and full off.

First issue is a weird one. I plugged in a 110v LED rope and all of the LEDs were dimly lit. When powered on I heard the relay clunk and lights when to full brightness. When powered off I heard the relay clunk and the lights went to being dimly lit. I had always thought X-10 appliance relays were DPST relays which would make a full break to the hot and neutral leads. This behavior indicates to me the relay is SPST breaking only the hot lead and not the neutral.

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Should only need a snubber if the realy only switched the hot lead and not the neutral, SPST. I had always thought the relays were DPST and disconnected the hot and the neutral. Guess I need to break one open to see for myself.

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I use the x10 appliance relays and have never heard them make a noise. It sounds like maybe there is something wrong with that one? Do you have others?

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The appliance modules have a small RC snubber network across the contacts, which is a good design practice for inductive loads.  They are big enough (and LED's need so little current) that in OFF they will do exactly what you are seeing.  See a typical schematic here:  idobartana.com/hakb/index.htm (you will have to put the http in front....)  This site has all kinds of X10 schematics.

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I use the x10 appliance relays and have never heard them make a noise. It sounds like maybe there is something wrong with that one? Do you have others?

t

I've been using X-10s for almost 20 years. All of my appliance have relays which make a clunk when they are turned on or turned off. It's been my experience the light modules and power outlets are the only ones which are silent. Maybe the newer appliance modules are silent? Haven't purchased a new appliance module in over 10 years so I don't know.

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The appliance modules have a small RC snubber network across the contacts, which is a good design practice for inductive loads.  They are big enough (and LED's need so little current) that in OFF they will do exactly what you are seeing.  See a typical schematic here:  idobartana.com/hakb/index.htm (you will have to put the http in front....)  This site has all kinds of X10 schematics.

Thanks. I'll take a look. I had always thought the appliance modules completely disconnected the hot and neutral.... Looks like I was wrong.

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I've been using X-10s for almost 20 years. All of my appliance have relays which make a clunk when they are turned on or turned off. It's been my experience the light modules and power outlets are the only ones which are silent. Maybe the newer appliance modules are silent? Haven't purchased a new appliance module in over 10 years so I don't know.

I generally use them outside and may not notice, the transceiver does make a loud click though.

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