Subject: From: Date:

Re: [ECS] RC-Series Communicating Thermostat bruce prager Tue, 9 Nov 1999 18:36:19 -0500

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Most "RS-232" thermostats are really RS-485 which is multi-drop RS-232,  Ie;
multiple addressed RS232 interfaces.
----- Original Message -----
From: Dave Kolb <davekolb@email.msn.com>
To: <ecs-list@netbloc.com>
Sent: Sunday, November 07, 1999 11:53 PM
Subject: Re: [ECS] RC-Series Communicating Thermostat


The HAI Omnistats can supposedly all be put on one RS232 line though that
seems very non standard to me. I guess it works because each is coded as a
unique device and only one will respond at a time. I have 6 total but have
not hooked them up to the OmniPro yet. They can also go to a PC but may need
an RS232 extender if over a 500' run I think.

Dave

-----Original Message-----
From: Chris Armbruster <carmbruster@cyvolution.com>
To: ecs-list@netbloc.com <ecs-list@netbloc.com>
Date: Sunday, November 07, 1999 10:48 PM
Subject: [ECS] RC-Series Communicating Thermostat


>I am considering re-doing my zoned HVAC.  Currently, I have no thermostats.
>Instead, I use temperature sensors, the analog inputs and relays on a
>MicroREDAC and Enerzone inflatable dampers.  I would prefer a system that
>has stand alone capability (in case the computer fails).  I am thinking
>about RC-Series Communicating Thermostats (RC-80).  I have a couple of
>questions about integrating the thermostats:
>
>1) Do I need a serial port for each thermostat or can I put all three on
the
>same port?
>
>2) Is there a way to set the swing temperature (this is the difference from
>the setpoint that is necessary to turn the HVAC on or off)
>
>3) Do the RC-Series thermostats remeber their programs in the event of a
>power failure or will I have to reprogram them?
>
>Regards,
>Chris
>

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