7
Inspection and maintenance
108
07.2020
ba
-o
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-us
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-ys
|
A1
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67
50
1 Re
v A
E
7.12
Geared limit switch
WARNING
Danger of personal injuries
➢
The geared limit switch is built in accordance with state of the art engineering and is
operationally safe.
➢
However, it may pose dangers if it is not used as intended.
➢
Observe the specifications in the enclosed circuit diagram.
➢
Observe for information on the sticker, which is applied to the inside of the hood of
the geared limit switch.
7.12.1
System description for geared limit switch - version 1
This geared limit switch is suitable for wire rope hoists with pole-changeable hoist motors.
The geared limit switch has an emergency hoist limit switch (switching points A
and A
)
for the highest and lowest hook position. Additionally, the geared limit switch is equipped
with an operational hoist limit switch for switching off in the highest hook position in
normal operation (switching point B
). At switching point B
, switching takes place from
the fastest to the slowest speed or vice versa.
If overtravel of the operational hoist limit switch takes place with a fault (B
), the
emergency hoist limit switch (A
) switches off the hoisting movement. Only once the error
has been eliminated is it possible to drive out of the area again.
Adjustment
screw
Switching
point
Function
Remark
S0 (S1-S8)
Adjustment screw for the block adjustment of all switching points
S1
(A
)
Emergency hoist limit switching, “top”
factory-set
S3
(B
)
Operational hoist limit switching, “top”
S4
(B
)
Fast/slow switching “top”
S2
(A
)
Emergency hoist limit switching, “bottom”
S5, S6, S7, S8
Optional
