Re: Simple data bus over DC Power Wires
Date: 06/24/04

Date: Thu, 24 Jun 2004 02:19:07 GMT

I used a pre-packaged interface card for Fisher Delta-V and field
hardware from peperyl-fuchs. The valves didn't cost any more with ASI
vs solenoids and limit switches. The other expense was the repeater
for long distance ~$500

On 22 Jun 2004 14:58:31 -0700, (Paul W.) wrote:

>Any idea what it would cost per node to implemented ASI, and how complex is it?
>Now sure how much the ASI chips cost. Siemens makes them I think.
> wrote in message news:<>...
>> Just my opinion, but AS-i works great and is easy to set up. I just
>> have one node, my first trial. 12 valves, solenoid operated with open
>> and close proximity switches, one repeater.
>> On 19 Jun 2004 07:04:41 -0700, (Paul W.) wrote:
>> >Hi Guys,
>> >
>> >I'm in the process of implementing some simple control nodes (just
>> >switches) and looking for the simplest (cheapest) network protocol to
>> >use. To date, LIN bus seems to be the best candidate. I need very
>> >low speed, high reliability and low off-board distance (a few up to
>> >10s of feet).
>> >
>> >Ideally, something that could be two wire with power and data combined
>> >would be ideal, so that the power could be distributed to power the
>> >slave nodes. LIN is good, but it requires a 4 wire (or 3 I suppose)
>> >interface.
>> >
>> >I looked at ASI (Acuator Sensor Interface), but not sure how practical
>> >it is.
>> >
>> >Anything else on the radar screen?
>> >
>> >Paul