I am relatively new with the Super PLCs. I have a question about the RS485 network.
In the PLC User Manual, resistors are needed to terminate the RS485 network.
If I only have two PLCs, and I want the two PLCs to communicate with each other,
1. are the two PLCs' RS485 considered to be a RS485 network?
2. Do I need to add the Resistors (120ohms, 560ohms, and 560ohms)?
3. Can the 5 VDC reference voltage be connected to the RS485 network as shown on page 3-4 in the PLC User Manual?
Thanks.
Daniel