Figure 4. Individual Tension Springs
Ls
L
Spring Breakage
Protection Cable
min
RP-LS42F-25xx/-38xx
RP-LS42F-75xx
Tensioning
Spring
RPA-S5-1
RPA-S3-1
Lmin
185 mm
201 mm
Ls
300 mm
300 mm
Spring Rating
2.5
3.5
Figure 5. Tension Spring Assembly
L
Ø
D
min
L
M12
30
max
RP-LS42F-25xx/-38xx
RP-LS42F-75xx
Tensioning
Spring
Assembly
RPA-S6-1
RPA-S4-1
Lmin
362 mm
465 mm
Lmax
466 mm
635 mm
ØD
42 mm
50 mm
5. Route the rope using pulleys (recommended) or eye bolts at each support point (securely/rigidly mounted) as described in
on p. 4.
Important:
Always use a pulley when changing the direction of the rope or routing the rope around a
corner, regardless of the angle. Minimize friction at all supports and change of direction; do not run rope
through conduit or other tubing.
Figure 6. Assembly of Rope and Hardware
Max. Length
Force to actuate must
not exceed 200 N (45 lbf)
400 mm (16 in.) max.
for actuation of switch
Max. Length
2-5 m
2-5 m
Lg = 200 mm to 400 mm
Lg = 200 mm
to 400 mm
La = 150 mm to 300 mm
La = 150 mm to 300 mm
The distance between
the ring and the
turnbuckle should be
as short as possible.
6. For models
RP-LS42F-..L with ring connection
:
a) Adjust the Turnbuckle (RP-TA1-1) to a median position (to allow for adjustment in both directions).
b) Attach the prepared turnbuckle to the rope using a thimble/clamp loop. Keep the rope’s PVC cover intact along its
complete length, except where it attaches to the clamps.
c) Assemble the Turnbuckle (RP-TA1-1) and the second thimble/clamp loop to attach the connection link between the
turnbuckle and the ring of the switch, as shown
on p. 4. Hardware kit RPAK-C2SBP-1 can be used for the
connection link.
d) Check the rope for proper routing for the complete length.
e) Assemble the third thimble/clamp on the ring of the switch.
f) Pull the connection link cable so that the approximate tension is achieved, and tighten the clamp to hold the rope firmly
in place.
g) Make sure the cut ends on the rope do not present a hazard (cutting, scraping, snagging, etc.). Electrical/plastic tape or
plastic tubing can be used to cover any sharp ends of the rope.
7. For models
RP-LS42F-..LF with integral turnbuckle
:
These models have their own integral turnbuckle and clamp to tension the rope and to hold it in place. This innovative
design provides for quick and easy rope fixing and tensioning, and requires no external turnbuckle, nor any additional clamp
at the switch end of the rope. To install the rope, as shown in
Rope Pull Emergency Stop Switches
4
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