I use your Snap line in our OEM controller, and I came across your Module Integration Guide (form 0876-100610 dated June 2010). Communicating directly with snap modules is something that I am very interested in doing.
According to that document, I can communicate with analog modules using either ARCNET on pins 12(+) and 14(-) or using RS-485 on pins 9(+) and 11(-). For testing, I have a USB-RS485 converted attached to my PC and will communicate with the modules using a VB.net application.
Now some questions…
I am not familiar with ARCNET. Does it use the standard RS-485 electrical specs(i.e. around ±5VDC differential pair) or is it something different?
Is there any advantage to using either ARCNET or RS-485?. Would there be a preference to using one over the other?
Do you have any more technical documents regarding communication directly with snap modules? Source code in any language?
As with most things, the first step can be quite large, and I am guessing that once I have taken that first step, I will have more questions.
Thanks for your time