Issue
- Can a door switch input be configured to operate without an input resistor?
- Can supervised inputs be configured to work without an input resistor?
Product Line
Andover Continuum
Environment
- NetController
- ACX5720
- ACX5740
- AC_1
- AC_1 Plus
Cause
When designing or troubleshooting a security access control system, it's essential to understand whether hardware requirements—such as input resistors—are optional or mandatory. This ensures proper functionality and avoids misconfiguration.
Resolution
In the Continuum door object class, the input type is fixed as a supervised input—it cannot be changed or configured otherwise.
As a result, input resistors are mandatory and must be installed for the system to function correctly. Supervised inputs rely on these resistors to detect tampering or wiring faults, which is critical for maintaining system integrity and security.
Additional Notes
- This requirement applies to all Continuum door objects regardless of controller model.
- Failure to install input resistors may result in false alarms or failure to detect door status accurately.
