Subject: From: Date:

Re: [ECS] RC-Series Communicating Thermostat Dave Kolb Tue, 9 Nov 1999 23:12:12 -0500

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I understand RS232 fine but have never worked with true RS485 though I
understand it's similar. All devices I saw that actually advertised
themselves as RS485 however needed a "bridge" to convert back and forth.

Dave

-----Original Message-----
From: bruce prager <bgprager@mindspring.com>
To: ecs-list@netbloc.com <ecs-list@netbloc.com>
Date: Tuesday, November 09, 1999 6:35 PM
Subject: Re: [ECS] RC-Series Communicating Thermostat


>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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