[Date Prev][Date
Next][Thread Prev][Thread Next][Date
Index][Thread Index]
Re: Sensors / Switches / etc
- To: ukha_d@xxxxxxx
- Subject: Re: Sensors / Switches / etc
- From: "David Buckley" <db@xxxxxxx>
- Date: Tue, 15 Apr 2003 17:30:13 -0000
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
--- In ukha_d@xxxxxxx, "Dan" <dtoma@f...> wrote:
> My opinion for the best approach is to mix between ethernet and a
> single-wire bus devices, with the cost as the main selection
factor. This
> can be a lot more difficult to design, but... this is not the nice
> part?...;-)
Since the late 90's I've had AppCon HA modules round the house(no
longer available, as far as I can tell) and it uses a single wire
serial system, and is rock solid reliable. It does not have a
required topology (ie star or bus), so you can bend it any way you
like. Its 2400 baud, which is slow but adequate. It uses a pullup
resistor to 12v, so reading the bus is just a potential divider, and
driving it is a transistor. A cheaper driver is hard to imagine.
Now officially, of course, I'm an RS485 fan. Again, 'cos its
reliable. And in my opinion, the primary requirement for core HA
sensors and actuators is relaibility.
David.
Home |
Main Index |
Thread Index
|