ARCNet & RS485

[remp]

Can some body explain to me the meanining of the following experssions ARCNet and RS 485. A consultant recently specified the following;

- Backbone running at 2.5Mbs using ARCNET communication?
- A local Area Network utilising RS485.?

I think I know the meaning of LON and BACNet and Modbus...they are BMS languages/protocols. Siemen and Honeywell have their own.

Where does Ethernet come into all this?

A brief explanination to broaden my basic knowledge would be appreciated or any suggested web link.

 

[show]

Try these:

http://www.arcnet.com/abtarc.htm

http://www.arcelect.com/RS485_info_Tutorial.htm