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Forums13
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Most Online117 Jan 16th, 2020
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#19529 - 02/11/17 02:02 AM
Re: Separate 'Group Control' power feeds
[Re: uppo72]
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Joined: Nov 2016
Posts: 20
scampbell
stranger
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stranger
Joined: Nov 2016
Posts: 20
Chicago, IL USA
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Interesting. What I do know about Otis systems though is most of the modern controllers like the 411 and 401 I noted use a ring style communication loop and each car controller has an ocss board (operation control sub system). My understanding is that All OCSS boards have the abity to become the group dispatcher. So it still isn't clear to me why there exists a separate feed to the group unless one of the car controllers was set as a master for the group and the others cannot assume any dispatching responsibility. What I'm trying to understand is when another 480V power feed for the group is required to be installed.
Last edited by scampbell; 02/11/17 02:05 AM.
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#19666 - 02/23/17 02:43 AM
Re: Separate 'Group Control' power feeds
[Re: E311]
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Joined: Nov 2016
Posts: 20
scampbell
stranger
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stranger
Joined: Nov 2016
Posts: 20
Chicago, IL USA
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401's will always have a separate group disconnect, they have a separate group controller. Some of the earlier 411HS units, specifically Mod versions, had a separate disconnect that fed a 3 phase transformer, this in turn fed the hall button power supply. Would the group controller for the 401's be typically installed in a separate cabinet, or did they just install the group boards and transformer in one of the controllers in the group? Indeed, the 411 I was referring to was a modernization job (411M). Similar question to above, one of the controllers contains the hall button power supply transformer then? Thanks for the feedback.
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