Passenger Lift Control Diagram

Discussion in 'The Projects Forum' started by yasirsajjad, Feb 26, 2010.

  1. yasirsajjad

    yasirsajjad Thread Starter New Member

    Joined:
    Feb 26, 2010
    Messages:
    1
    Hi
    Can any body mail me Passenger Lift control diagram (electrical relay logic)

    i will be highly thankful

    Regards

    Yasir Sajjad
    <snip>
    Last edited by a moderator: Feb 26, 2010
  2. andreapg

    andreapg Member

    Joined:
    Feb 2, 2010
    Messages:
    38
    Location:
    Italy
    Hi,
    In the following pdf link (last page) you can find a circuit schematic which works for a 4 floors elevator, with manual doors. I'll try to explain you how it works(can't speek english very well).
    Between T1 and T4 (bold line) you can see the main safety switches:
    over run switches (they turn off the equipment if a motor brake failure occurs);
    floor door switch;
    safety speed limit control (to prevent crashes);
    stop button/car door safety switch.
    In the second (schematic) page, on the left you will see the drivig buttons:
    P1-P2-P3-P4 are floor buttons; C1-C2-C3-C4 are car buttons.
    RO delay allows the floor buttons (NT on Otis panels).
    S1-S2-S3-S4 are mechanical exchange switches which are located in the shaft, on each floor. They reverse the car run, and they are turned through a shape installed on the car (look for "invertitore" and "sagoma").
    D= down power relay
    S= up power relay
    GV= high speed power relay
    PV= low speed power relay
    RV= select car speed
    IF= stop proximity magnetic switch (it opens the circuit once the car is on the floor).
    When the car comes near the reserved floor, the related switch (S1-S2-S3-S4) takes the middle position: S or D keeps the high level through its 12-8 switch, but RV turns off. Than we have the speed exchange.
    http://electronline.it/doc/asc.pdf
    That schematic was designed with educational intent, than it is on the public domain.
    Last edited: Apr 14, 2010
  3. andreapg

    andreapg Member

    Joined:
    Feb 2, 2010
    Messages:
    38
    Location:
    Italy
    Uploaded the same schematic as a file attachment

    Attached Files:

    • asc.pdf
      File size:
      118.5 KB
      Views:
      381
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