CM10A (IBM Home Director serial i/f) AC jack (outlet)

Jul 26, 2006 2 Replies

Greetings:



There is an AC outlet (jack) on the IBM Home Director version of the CM10A; it has no power (off) by default and it doesn't respond to unit address 1 (there is no unit select switch). Presumeably there is a function code that will activate it. Anyone know how (the CM11/CM10 protocol description at tanj.com does not mention it)?



Regards,



Michael



Never mind, it turns out that the outlet is powered; it must be an isolated (emi surpressed) ac outlet to prevent a switched load (e.g. computer) from propagating noise onto the power line. It is not switched (sorry, I didn't open the unit to inspect).

Regards,

Michael

BTW, a useful tool to trace x10 signals is an FM power-line intercom; x10 signals create a recognizable pulsed tone on an intercom, which will verify if signals are present or absent at a proposed location.

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