7
Inspection and maintenance
07.2020
109
ba
-o
.2
.6
.0
-us
-3
.2
-ys
|
A1
18
67
50
1 Re
v A
E
7.12.2
System description for geared limit switch - version 2
This geared limit switch is suitable for wire rope hoists with frequency-controlled 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 operational hoist limit switches for switching off in the highest and lowest hook
position in normal operation (switching points B
and B
). At switching points B
and
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
or B
), the
emergency hoist limit switch (A
or 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”
S6
(B
)
Operational hoist limit switching, “bottom”
S5
(B
)
Fast/slow switching “bottom”
S7, S8
Optional
7.12.3
Maintenance work on the geared limit switch
The maintenance work is limited to checking the switch-off points. No maintenance and
inspection work is necessary on the geared limit switch itself.
