4
Installation
48
07.2020
ba
-o
.2
.6
.0
-us
-3
.2
-ys
|
A1
18
67
50
1 Re
v A
E
4.11
Hook operated hoist limit switch
with weight ball “BLS” (option)
The hook operated hoist limit switch is also available as “hook operated hoist limit switch
with switch rod” variant. Only one variant can be mounted.
a
min. distance to first obstacle
c
Dimension between emergency and
ope
rational hoist limit switching, “top”
x1
Dimension between hook operated
hoist limit switching and emergency
hoist limit switching, “top”
S (C
) Hook operated hoist limit switching
S1 (A
)
Emergency hoist limit switching, “top”
S3 (B
)
Operational hoist limit switching,
“top”
The hook operated limit switch can be integrated as an optional hoist limit switch. It is
triggered after the standard operational hoist limit switch S3, when the hook block relieves
the weight-loaded limit switch.
If this option is used, the C-dimension increases in accordance with the table.
Type
Hook dimension “C”
enlargement
x1
[in]
[in]
YKA/SKA, YKB/SKB
5.9
2
YKC/SKC, YKE/SKE
7.9
2
YKD/SKD
9.8
2
m
≥ 2
in
n
≥ 0.79
in
(1) Switch
(2) Rocker push button
(3) Spring
(4) Connecting rope
(5) Ball
(6) Bolted connection
(7) wedge clamp
Function
•
The hook travels against the ball (5) and thereby relieves the connecting rope (4).
•
The connecting rope (4) relieves the spring (3).
•
The spring (3) actuates the switch (1) via the rocker push button (2). The hoisting
movement is stopped.
