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Old 02-26-2010, 08:24 PM
yasirsajjad yasirsajjad is offline
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Red face Passenger Lift Control Diagram

Can any body mail me Passenger Lift control diagram (electrical relay logic)

i will be highly thankful


Yasir Sajjad

Last edited by bertus; 02-26-2010 at 08:57 PM. Reason: Removed email address to protect you from spambots
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Old 02-26-2010, 11:52 PM
andreapg andreapg is offline
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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 by andreapg; 04-14-2010 at 09:25 PM.
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Old 04-14-2010, 09:29 PM
andreapg andreapg is offline
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Join Date: Feb 2010
Location: Italy
Posts: 38
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Uploaded the same schematic as a file attachment
Attached Files
File Type: pdf asc.pdf (118.5 KB, 376 views)
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