I have a question regarding proper RS-485 termination for a system that would be at the "end" of the network. The circuit requires additional TVS protection with a series current limiting resistors for when the TVS is conducting. What is the proper termination scheme? Having the 120 Ohm resistor in front of or behind the TVS protection?
The two configurations are depicted below (Termination #1 vs Termination #2). Disregard the actual part numbers.
The two configurations are depicted below (Termination #1 vs Termination #2). Disregard the actual part numbers.