What is RS-485?
Simple definition
RS-485 is a serial communication standard commonly used for bus-connected field devices.
Why it matters in wiring diagrams
It usually requires correct polarity, addressing and daisy-chain style wiring.
When reading a wiring diagram, this term usually affects cable choice, power path, signal path, device selection or commissioning notes.
Common mistakes
- Assuming the term means the same thing across all brands.
- Ignoring the actual terminal names in the manufacturer manual.
- Not documenting how the term applies to the final installed system.