Yes, RS485 is a little hard, since there is no industry standard. I realize that my personal experience should not be taken as the only viewpoint, but maybe you can add my viewpoint to yours and make something cool out of it.
Most all of my RS485 exposure is for BacNet and Modbus. I do run accross other flavors, but the physical interface is the same. The terminal designations shown are consistent with the adapter I linked to. The wire is usually 22/2 awg or 22/3 with low capacitance. Reaching baud rates of 38.4kbaud to 76.8kbaud. I can link to something with some tech specs and installation details if you like.
Without an appropriate interface, I am looking at several options. The most reliable is a Bacnet MSTP to Bacnet IP Router. But these are between $150-350 each and I may use as many as 4 to 6 of these. These numbers are intended to provide a reference point for market feasibility if you may want to consider a new FACET card. If the price point is below $75 - 100 per connection, you have a money maker. 2 connections on a card with a price point similar to the other FACET cards would be a good thing. I would say 4 connections would be ideal, as it covers many many applications. I usually use between 2 and 4 connections. Sometimes 6.
You guys are great. Keep up the good work!Statistics: Posted by sumdumguy — Mon Sep 09, 2019 3:30 pm
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