Rollshutter Installation Instructions, 22
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13.1d) Contact Sensing (CS) Motors:
Important: Operate CS motors only when installed inside a shaft and mounted into a complete panel box assembly.
When the CS motor and shaft are mounted in the panel box, the shaft requires slightly loose play (1/8" to ¼" or 3mm
to 6mm) in the side- to-side and up/down directions.
Contact sensing motors do not contain limit switches. A Rollshutter equipped with a CS motor halts in the "up" position
because the mechanical stoppers in the bottom profile will stop the curtain and this resistance is sensed by the motor.
In the fully "down" position the curtain is supported by the sill, and the relief of load is sensed by the motor and it
subsequently shuts itself off. The CS motor has the benefit of not requiring any initial limit switch setting or any
subsequent adjustments. Additionally, if a Rollshutter curtain equipped with a CS motor encounters an obstacle in its
downward path, the resistance is sensed and the motor turns itself off before any damage is done to the Rollshutter or
the object. To get the Rollshutter going again after such an encounter, just briefly switch to the "up" direction to clear
the curtain from the obstruction, then switch to "stop", remove the object from the curtain path, and continue by
switching the Rollshutter in the "down" direction again. Another benefit of the CS motor is its built-in relay that will
permit hooking up of more than one CS motor to a switching mechanism without running the risk of encountering
damaging capacitor feedback.
Important: Always ensure that your switching mechanism has sufficient capacity for the combined amperages of all CS
motors hooked up to it. Never combine a hook-up with any non-CS motors. Use only switching mechanisms provided
by the factory.
Important: For the next steps, it is important to let the motor shut itself off automatically when the curtain reaches
the fully- open or fully-closed positions. Do not switch off the motor using the switch at either physical limit unless
something is wrong.
Ensure that all stoppers are installed per Section 111 and will function. The function of the stoppers is to impact with
the panel box in order to transfer pressure to the motor and make it stop. Surface stoppers impact against the panel
box lid, so if the Rollshutter is equipped with surface stoppers then temporarily install the panel box lid as in Section 15.
Rotate the shaft with your hands as if the Rollshutter curtain were moving in the "down" direction. Rotate until the shaft
stops (usually only a small movement). Then switch the tester cable to the "up" direction and let the motor run until the
stoppers im- pact with the panel box and the motor shuts itself off. Next, switch to the "down" direction and let the
motor run down until the curtain fully closes after reaching the sill and the motor shuts itself off. Run the curtain up and
down two more times, always letting the motor shut itself off on its own.
This is the reason for this is after three initial up and down movements, the microprocessor in the motor automatically
learns where the upper and lower limits are approximately located. In the future, it will become extremely sensitive to
shut-off pres(1)sure when it is within 80º of rotation of the memorized limits. As a result, the stoppers will not impact
so hard in the future in the "up" direction, and there will be no chance of the motor accidentally overturning in the
down direction in case the hangers do not exert enough counter pressure.
Features the installer needs to know:
At any time during a "down" movement, the Rollshutter curtain can impact with an object and the exerted pressure will
switch off the motor. Even if the curtain impacts with an object repeatedly at the same spot, the memory in the motor
will not change.
Important: When setting the initial memory the motor will only memorize a "down" limit after a minimum of 1½
rotations of the shaft. Furthermore, when the Rollshutter is positioned at the "up" limit and it is switched to "down",
the "down" shut-off sensor is not active until the shaft has rotated at least 180º (½ turn). This feature is purposely built-
in so that the initial resistance of the curtain to enter the guide rails does not accidentally shut off the motor.
Warning: There is one small drawback to this feature: If the Rollshutter covers an outward-opening window and the
sash is left open, the "down" moving curtain may impact with it right after it exits the panel box. The contact sensing
feature does not activate immediately and therefore the motor will not shut off until it rotates 180º, which means the
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