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Adjustment RSU limit switch system
ES11
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ES21
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RSU limit switch system installation
The steps required in order to correctly set the RSU limit switch system of an RW motor gearbox, are
described below.
Current and voltage range
The contacts in the switches of the Ridder RSU limit switch system, are capable of switching the
following currents:
•
24 V-AC, currents from 45 mA to 130 mA;
•
230 V, currents up to 1 A.
Ridder RSU limit switch system
The Ridder RSU limit switch system is a linear switch system, specifically designed for use in the RW
motor gearboxes. The limit switch system is driven by the output shaft of the motor gearbox, via a
secondary transmission. Depending on the type of motor gearbox, a number of revolutions of the
output shaft can be set, between a starting and ending position. In this case 86 revolutions of the
output shaft.
Delivery
A Ridder motor gearbox with RSU limit switch system is delivered with switch followers (4) whose
adjustment rings (3) still have to be fastened. This means that the drive can turn freely in both
directions. This also avoids the possibility of causing damage to the limit switch system (when it has
not yet been connected), should any (preset) limiting positions be exceeded during electrical or manual
operation of the motor.
How it works
This transmission drives the threaded shaft (1) of the Ridder RSU limit switch system, either with a
toothed belt, or with a worm and gear combination. When running, the threaded switch followers (4)
will move along the threaded shaft as it rotates. One setscrew (a) rests against the switch spring (6).
When an end position is reached, the switch follower will strike the stop (7) and will then rotate with the
threaded shaft. This deflects the switch spring, and a duty switch (S11 or S12) will be tripped. This
causes a signal that activates the relay, stopping the motor gearbox. Should a relay or duty switch fail,
then a safety switch (ES21 or ES22) will also be tripped by the switch spring. This causes a signal that
activates a safety relay, stopping the controller and also thereby the motor gearbox. This prevents
consequential damage to the driven system.
2011.01
All manuals and user guides at all-guides.com
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Ridder Drive Systems
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ES12
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+31
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341 416 854
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I www.ridder.com
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341 416 611
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ES11
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