Fault Notification Device
The A500 provides notification of communication failure for critical applications such as Areas of Rescue and elevator communications and satisfies the requirements of ASME A17.1-2016 and NFPA 72-2019.  The A500 is described in NFPA 72-2019 as an “audible and visual notification appliance”.

Cut Sheet PDF – A500



The A500 Fault Notification Device provides notification and the ability to communicate between local endpoints and local or remote responding endpoints has failed.

  • Failure notification within 200 seconds
  • Audible Alarm suspension
  • Re-alarm within 24 hours (if fault not removed)
  • Automatic reset when a fault is removed
  • POE and Alternate power