Passenger Lift Control Diagram

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

  1. yasirsajjad

    Thread Starter New Member

    Feb 26, 2010
    Can any body mail me Passenger Lift control diagram (electrical relay logic)

    i will be highly thankful


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

    Active Member

    Feb 2, 2010
    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.
    That schematic was designed with educational intent, than it is on the public domain.
    Last edited: Apr 14, 2010
  3. andreapg

    Active Member

    Feb 2, 2010
    Uploaded the same schematic as a file attachment
    • asc.pdf
      File size:
      118.5 KB