Answer:
Unlike passive display-only repeaters, the ZXr-A provides active system controls—including System Reset, Accept, Mute, Silence Alarms, and an integral Self-Test—protected by a key-operated 'Access Enable' keyswitch to prevent unauthorized operation.
The Morley-IAS ZXr-A is an active remote control and display unit, differentiating it from passive display repeaters that only mirror status indications. It allows designated operators to take immediate local action from remote control stations such as nurse desks, gatehouses, and security monitoring rooms.
Key distinguishing functional features include:
- Active System Push Buttons: Integrated front-panel push buttons enable authorized operators to execute System Reset, Accept, Mute, Silence Alarms, and initiate a self-test diagnostic routine.
- 'Access Enable' Key-Switch: A physical keylock switch safeguards the command functions, ensuring that fire system controls can only be engaged by authorized keyholders.
- Built-In Self-Test Sequence: Features an operator-initiated test sequence to systematically verify the mechanical push buttons, keyswitch operation, and display indicators.
- Supervised Communications Loss LED: Features a dedicated yellow indicator that illuminates immediately if RS485 communication with the host panel fails.
