Another CDM1250 rear pin question. Connecting to home automation

[RT145]

I have a CDM1250 that is currently being used a station alerter. It is programmed to activate upon hearing a certain quick call tone and auto close 30 seconds later. The audio out is connected to an amp and speakers throughout the station.

What I was wondering is, is it possible to also connect the CDM to an X10 powerflash security module (https://www.homecontrols.com/X10-Powerflash-Security-Interface-Module-PSC01-XPPSC01) to have the lights in the station turn on when the tones are activated as well.

The powerflash is activated either by applying 0-18VDC to the contacts or by simply closing the contacts. Would this work with the CDM?

 

[cmdrwill]

You will need a relay with specifications for the coil voltage and current to be compatible with the CDM radio's Alert circuit and not overload it. The relay will need two sets of contacts, one to activate the X10 lighting relay and the other for your alarm.

 

[RT145]

The CDM actually doesn't trip an external alarm, it only uses the external audio output.

 

[RT145]

I'm thinking maybe a 12v powered dry contact relay? So it just shuts the contacts on the other side when 12v is applied. Digikey used to make one that operated on as low as 6ma but they don't make it anymore. Time to find something comparable.

 

[ramal121]

The horn alert output from a CDM will drive a relay with a few hundred milliamps. It will run one of those black cube relays but that is kind of overkill. Look at an ELK 912 relay board. They pull about 35 mA and will run fine off your radio.

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[RT145]

Would this one work? I'm thinking the timer would be handy since I wouldn't have to rely on the internal timer.

https://www.altronix.com/products/6062


Also to confirm, which pin would be best to use?

 

[ramal121]

Yes I believe that is suitable. Back to ELK products, I use the 924 timer for things like this, well just 'cuz. Best to get a little plastic project box to put this in as either are just bare boards.

If the X-10 interface only responds to a closure ( on when active, off when released) then a timer is your best bet. The CDM only allows up to 20 seconds for output activation. If you can get out of bed, grab your boots and get to the app bay in 20 seconds my hat is off to you.

You would use pin 4 of the accessory connector (default is external alarm. If it's something else you'll have to program it back). That is the only pin that responds to a quick call alert. It normally has 12 volts on it and when paged will go to ground. This means you will have to use the negative trigger function of the timer board. On the CDM I usually set the external alarm timer for one second, enough to trigger the timer.

EDIT! After looking again at the Altronix, it only responds to a positive trigger. DO NOT USE. Get an ELK 924 instead. I buy mine at Amazon.

 

[ramal121]

Crap, I goofed. ELK 924 is only a relay board. Use those quite a bit for various projects.

The ELK timer board is model 960. Sorry about that.

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[RT145]

Excellent, thank you for your help