Otis Elevonic 401 was the first elevator control system with synthesized speech as an option, information display, and security systems. It was also one of the first elevator systems equipped with weight sensors so that fully loaded cars could bypass hall calls for safety reason. Elevonic 401 dispatched cars in response to variants in building traffic as they occurred. The Otis Elevonic 401 was later succeeded by the Otis Elevonic 411 and Elevonic 411M in 1990. Not all Otis Elevonic 401 elevators say Elevonic 401 on the panel. These usually have a speed of 1000-1200 fpm.
The Elevonic 401 synthesized speech uses a form of computerized speech synthesis and has 111-word vocabulary (supplied by Memco). It can greet passengers, say whether the elevator is going up or down, announce floors and safety messages.
Although exact specs are unknown, these are the options known to exist.
- DC Gearless Machine with Motor-Generator set (older) or Silicon Controlled Rectifier Drive (newer)
- 350/500/700/800/1000/1200/1400+ FPM speeds (imperial).
- Speed up to 6m/s (metric).
- Center open or slide open doors
- Can have a rear door.
- Can serve up to 73 floors.
- Maximum 8 car per group.
- Can be in a double deck configuration.
- Otis Series 1 (older), Otis The Halo (older/newer) or Otis Vanity fixtures.
- 3500/4000/4500/5000 lbs. capacities (and 3000 lbs. capacity per cab for double deck, imperial)
- Up 2500 KG capacities (1500 KG for double decker, metric)
- Main article: List of notable Otis Elevonic 401 elevator installations