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[Marauder2003]

What are the differences besides the Pro being European? 

It appears the Marmitek AHP works with the CM15A.

[dhouston]

FWIW, my WAG (I never used AHP or any X10 software) is that programming the interface is quite similar but the Marmitek hardware is designed for 220V. I don't know whether there's any handshaking that identifies the hardware.

There are folks in Europe who might have answers as some modified US 120V hardware for use with 220V before there was 220V hardware available. This continued even after the availability of 220V hardware as European prices were much higher than US prices.

Someone at Laser Business Systems might know whether the software is interchangeable.

• http://www.laser.com/

[bcwmachine]

Believe that the euro version uses a different rf freq. Also designed for 220volt 50 hz power.
Bruce

[Brian H]

http://www.marmitek.com/en/product-details/home-automation-security/x-10-home-automation/transmitters-and-controllers/cm15pro.php

230 Volt 50 cycles power with a power connector the mate with European outlets.
Different RF frequency 433.92 MHz. Than the CM15A 310 MHz used in the USA and Canada.

[RHBernard]

I once read a technical article about X-10 circuitry which said that the X-10 signals frequency was synthesized from the power line frequency.  So if true and the 240v devices use the same scheme, they should interchange successfully.  It says in this thread that US devices were used in Europe, so perhaps someone in the US has tried a European device in the US.  Will that person stand up and tell us whether it worked successfully in the US.

[Brian H]

The X10 power line transmitter and receiver use tuned coils. For the 120KHz power line signal.

They are timed to the Zero Crossing of the AC sine wave. 50 cycle units take a longer time period to get the whole message sent.

There is some CM15A information here. With a link to the CM15A main board schematic.
http://www.davehouston.net/cm15a.htm

The whole CM15A set of schematics and photos is on the FCC Database.
http://transition.fcc.gov/oet/ea/fccid/
Grantee: B4S
Product Code: CM15
Details section.

[Brian H]

There are some 120 to 220 volt modifications for X10 modules on this web site.
http://www.idobartana.com/hakb/index.htm

Most of the modules use a line driven type power supply. Using an AC rated capacitor to limit the current into the power supply. Along with a few filter caps, diodes and Zener Diodes.
On those. The capacitors, resistors and MOVs are changed.
Many of our US models have the hot Line input as the common power supply reference.

The CM15A has a power transformer. So changing it to 220 would need a new transformer and coupling capacitor for the power line signals to the power line receiver and transmitter.

The CM15Pro being European also has a completely different X10 RF 433.92MHz frequency from our 310MHz.