Otis selector elevator controller

Otis selector elevator controller

[@donalddavis581]

I have many many hours working on those in a 40 year career. We had a bank of 4 of these!

[@passtranelectronics]

muy bueno amigo, no me imagino a los ingenieros de esos tiempos realizando los diseños de la conexiones de todos esos relés para hacer un circuito lógico de control para que el ascensor funcionara de forma correcta, tanto para que el ascensor supiera cuando subir, cuando bajar, cuando a llegado a la posición de la puerta de llamada seleccionada, cuando abrir las puertas, cuando activar el freno, como hacer para que el mismo pueda atender a las llamadas de las personas, creo que el peor trabajo era en de la persona que tuviera que realizar una reparación caso de una falla

[@wns808]

Interesting this, relays and motor generators are what controlled elevators back in the day. Sadly these relics are being replaced by computerized controls and VVVF drives. Therefore you won’t see much of these classic systems anymore

[@blacklight8765]

We replaced 8 of them in two residential building. But kept the old gearless Otis machines

[@F8Tributo]

The 6850 BJ selector?- Synchronous panel, Advancer panel, Advancer motor, SLS cams, GK wing for motor field strengthening, dogs and pawls, LV ring, leveling and door zone brushes, pie plates, floor bars with cam-actuated hook strip (aka "daisy chain") for direction finding, 11 oil cups, (iirc), chain, gears, tape and tape sheave. That and the 10, 20, 30 UCL controllers is what I first cut my teeth on in 1985. Then as the years went by, this gave way to the Frankenstein hodge-podge of the digital/mechanical era, (Ward-Leonard generator jobs, but with electronic gen field control) Then that gave way to static drives, (but often still running on DC hoist motors), which then gave way to AC hoist motors running on VVVF drives. And PMSM Permanent Magnet Synchronous Motors with a resolver for degree-by-degree motor rotation feedback. All of which allows for much cleaner machine rooms! Now we have flakey ethernet or can bus connections (and flakey software) where all the circuit boards communicate on a ring. Thyssen and Kone's can bus seems problematic to me, at least in my experience. But I've never had one single problem at all with Motion Control Engineering's can bus. Modern electronic systems are really sensitive to good grounding, and don't do well in vibrating, hot, dusty, and staticky conditions. In this regard, processor based systems are not ideal for the rigors of elevator duty. The 6850 BJ selector is really just an "information" device, (Mostly) It answers questions such as "Where is the car? Which way does it need to go? Where should it stop?", etc, etc, and information can be compressed into digital format, processor based, program driven. Controllers can be much smaller, with less field wiring. The reduction of materials and labor in modern elevators seems to be the driving factor, to reduce costs. Not necessarily to make a better, reliable, durable elevator. The control systems can't be made quite as small as a pack of chewing gum, (as our Russian friend said below), but they're also no way near the size of these old full electro/mechanical systems. But these old systems were glorious examples of electrical engineering and craftsmanship! I always admired the thorough, clever Otis engineering whenever I worked on them! And faultless schematics! They were brilliant "back in the day", and they're really still brilliant, even by today's standards. They are not "simple", and you really had to know how an elevator functioned from a dead stop, to setting a call, establishing direction, starting the generator, powering up the generator field and lifting the brake, speed switches to strengthen the gen field while accelerating, motor field weakening for faster speeds, detecting a floor stop with the advancer panel and floor bar, dogging in, synchronous panel catches up with the advancer panel, GK wing to strengthen the motor field on stopping on dogging in,, SLS cams unwind to drop out the speed switches in sequence, LV ring drops on the pie plate to heat it up and there's two door zone contacts for pre-opening, leveling zones, open the doors and stop when the leveling brush tips off the plate. Then there's the beauty of the 6970 door operator and its saturable reactor..modern mechanics wouldn't know what the he** a saturable reactor is, unless they've been around a while, or had a really good education. Many elevator mechanics today would not understand these systems in any depth, or have a hope of fixing or adjusting them. Just because they are hard-wired with relays and contactors, no circuit boards to speak of, that doesn't mean they're "simple" at all, just the opposite. They're really quite involved with many layers to unpack, and you gotta know your isht! Anyway, I've got a couple years left, before going out to pasture, so it's all water under the bridge now.

[@yusufwilliams206]

We call that a pie plate selector in cape town ,south Africa

[@caroleast9636]

Very unusual way of wiring the floor bar contacts with the wires looping in from the front. We usually ran the wires in from the side, leaving clear access to the studs..

[@blacklight8765]

Each is unique in its own way. .... i mean was :( All were replace by GALaxy 4

[@upanddownadventures]

Is this still here today, or has it since been modernized?

[@blacklight8765]

Sadly gone, replaced with Galaxy 4 system, but at least the machines were kept

[@advantage2023]

А теперь все это заменит контроллер размером с жвачку...

[@blacklight8765]

"and now all this will replace the controller the size of chewing gum" not yet

[@F8Tributo]

I'd tend to agree- Because the selector is really just information, and information can be compressed into digital format. But these old systems were glorious examples of electrical engineering and craftsmanship!

[@caroleast9636]

Those old 6850 selectors were a masterpiece in the pre-computer age. It’s easy to say that they were “just an information device” but they did what they were intended to do…and they did it very well. Seems strange now to hear them called “pie plate selectors”. I worked with them for 42 years in London, installation and service, and never heard that term used.

[@philipcollins3849]

Probably a VIP 260 controller

[@FloridianElevators]

Where at? Also, do these have the old Touch Sensitive buttons or do they have black buttons that stick out of the panel or black halo buttons?

[@VijayKumar-in7zw]

6850BJ SELECTOR show us also the FH hook switches and stopping switches tal,bal, advancer , ratio of the vernier what it is 111.1 or 60.1., Machine tag generator tag. Please

[@blacklight8765]

Sorry man. The units were modded out. Another piece of history gone forever.

[@gurveersingh3358]

Bro can I use your video for my presentation? I'll state on the slide as "courtesy of BlackLight"

[@blacklight8765]

1 MILLION US DOLLARS ! haaa All yours. Not many left.

[@gurveersingh3358]

@@blacklight8765 Thanks man. You're right, I should've taken pictures of it when I still had the chance years ago