What is a monitored input?
Simple definition
A monitored input can detect more than just open or closed states, often using resistors or supervision methods.
Why it matters in wiring diagrams
It is used where the system needs to detect normal, alarm, tamper or fault states.
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.