Interesting. One question I had was if remote stations and serial comms were used with the hall buttons on new 401 installs. They did with LRV-3 and LRV-4 but was not sure if they released the technology for the 401 units.


By the time OTIS released the E311, everything went serial connection to the ring car boards and no more independent group controller since each RCB can become group dispatcher. Other thing done which was clever was using the switchover module so you have full power redundancy in the hall power. It's still done this way and is a very good design in my opinion