Subject: From: Date:

RE: [ECS] NAPCO support Dan Hoehnen Fri, 4 Feb 2000 16:05:19 -0500

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Bill,

The napco serial protocol requires the use of at least 2 handshaking
signals.  Thus, I doubt you can communicate with the panel with only 3
wires.  You may be able to receive data, but ECS will not be able to send
commands.  At least that's how I remembere it working.

Dan



> Joe,
>
> OK, I was using Security-Zone-C type item to do that; reports state of
> "Normal" (i.e., closed or ok) or "Open" when the zone is opened (I'm
> assuming normally closed contacts for door/window being closed)
>
> How, specifically, did you wire your rs-232 connector to the
> PC-Mini plug???
> Did you use 3 wires only (TXd, RXc, Signal Gnd) and short the others
> together or did you also wire in DTR, RTS, etc...???
>
> My problem is that I have ONLY 3 wires available to my panel without MAJOR
> wiring problems-----
>
> Bill Walters
>
>
>

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