What is OSDP?
Simple definition
OSDP is a reader communication protocol commonly used over RS-485 style wiring.
Why it matters in wiring diagrams
It can provide supervised and more secure reader communication where supported.
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.