An Elevator ARD is a specialized emergency UPS system specifically engineered for lift evacuation during grid blackouts. Unlike standard UPS units, the AoKu ARD powers the elevator control electronics (220Vac) while deriving power directly from the battery bank to energize the motor inverter DC bus. Crucially, the AoKu ARD features a fail-safe pass-through mechanism: if the batteries are disconnected, faulty, or completely drained, grid AC power still flows directly to the lift controller during normal operation, ensuring the elevator is never taken offline by a battery fault.

Yes. The AoKu ARD Series operates seamlessly with both synchronous and asynchronous traction motors and is compatible with all major VVVF elevator drive inverters (e.g., Yaskawa, Monarch, STEP, Fuji, KONE, OTIS, Schindler). Because the inverter's DC bus is powered directly from the ARD battery bank, the system handles emergency rescue across all elevator panel power ratings.

The K1 output is a time-delayed 220Vac line designed to energize specific brake or contactor circuits after the main lift control panel initializes. The delay time can be set to 5 seconds, 10 seconds, or 20 seconds using the jumper header on the control PCB (No. BINV-CON): Jumper pins 13-14 for 5s, pins 5-6 for 10s, and pins 3-4 for 20s.

When main AC power fails, the ARD instantly switches to battery mode (<10ms transfer time) and supplies pure sine wave power to the control panel and inverter. The elevator moves the cabin to the nearest floor and opens the doors. After 5 minutes, the ARD automatically shuts down completely to enter zero-current standby mode. This prevents deep discharge damage to the battery bank during extended blackouts.

The AoKu ARD board includes an optional 12Vdc auxiliary output for elevator emergency intercoms and alarm systems, as well as an optional 310Vdc output for specialized inverter control circuits (such as Yaskawa L1000A CN19). It also features a Dry Connector Board with inputs for Door Limit Switches (to stop emergency operation once doors open) and status signal outputs (C-D and E-F) to notify the elevator controller of power state changes.

To maintain optimal performance, batteries should be checked periodically for terminal voltage (12V-13V under load). The system includes an accessible on-board AC input fuse and battery breaker for easy servicing. For long battery life, ambient machine room temperatures should be kept below 45°C, and a monthly simulated evacuation test during routine lift maintenance is recommended to keep battery cells active.