JLL 2000 Series, User Manual

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If the speed is 150’/min (0.75m/s.) or less, hoistway access switches shall be provided
at the top landing when the distance from the top of the car to the landing still
exceeds 900mm (35 in.) when the car platform is levelled with the second landing
from the top.
With the new A17.1/B44 code, we shall limit the movement of the car in the up and
down direction.
•
The movement shall be limited in the down direction to a travel not greater
than the height of the car crosshead above the car platform, and limited in the
up direction to the distance the platform guard extends below the car platform.
•
The travel may be limited with a mechanical limit switch as shown in the
figure below or by installing a 6-inch south magnet to activate the "USL"
detector of the selector tape.
•
Repeat is you have a bottom hoistway access.
Limit the movement of the car
at the upper landing.
ACT
Car
Car at the upper landing.
Car at the upper landing.
Car
Limit the movement of the car
at highest floor when the magnet
USL sensor is activated.
Or
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