Hi,
I have to put together a RS485 network on of all things a super maxi called InfoTrack.
The network is to connect together a PLC, an Arduino and a Raspberry Pi using Modbus. I've got these all talking to each other now I just have to come up with the actual cabling and connectors.
As I haven't been able to google anything off the shelf for this the best I have been able to think of so far is to use a 6 terminal terminal block at each connection point and mount this in a jiffy box.
The six terminals are 1 to 6, 1 and 2 for the RS485 network coming in or if there is no other connection a 120 ohm resistor. 3 and 4 for the A and B for the device at this point (pi, arduino etc) and 5 and 6 for the RS485 network going out or another resistor.
On the other side of the terminal block I'll just wire 1 and 3 together, 2 and 4 together and so on.
For cable I am thinking of using 4 core twisted pair telephone cable.
This should all work but I can't help thinking there must be a better way. Surely other people have had to create RS485 Modbus networks?