Somfy Altus RTS 680R2 LT60 Motor Fit and Torque Guide

Installers reach for the Somfy Altus RTS 680R2 when an exterior awning or a rolling shutter outgrows the LT50 range. Somfy rates this motor at 80 Nm and 14 rpm, and the head carries a Radio Technology Somfy receiver inside it. You pair a handheld remote and skip the control run back to the tube.

Tube Size Comes Before Torque

Somfy publishes a 2.37 in minimum internal tube diameter for reference 1164261. Measure the inside of the tube, not the outside. A tube that reads 60mm across its outer face loses wall thickness on both sides, and the motor will not enter. The motor body runs 2.36 in in diameter, the external diameter at the crown reads 2.26 in, and the unwrapped length reaches 29.13 in before you add a crown and a drive.

Length decides more jobs than installers expect. A narrow awning leaves little room once the motor, the crown, the idler end and the brackets take their share of the tube. Confirm the tube first. Order the motor second.

Awnings and Shutters the 680R2 Drives

Somfy lists two applications for this reference: awnings and rolling shutters. The 80 Nm rating sits near the top of the 600 Series ladder, above the 660R2 at 60 Nm and under the 6100R2 at 100 Nm. Large retractable awnings with heavy acrylic fabric land in this band, and so do wide commercial shutters on a 70mm octagonal tube.

Somfy publishes the torque as 80 Nm. The store description prints 704 in-lb beside that figure, and the conversion runs closer to 708 in-lb. Size the job from the newton meter number Somfy publishes.

Star-head mounting sets this SKU apart from its CMO sibling. A star head takes an LT60 star bracket and gives you no manual override eye. Jobs that need a crank override run the LT60 680R2 CMO motor on a 4-wire circuit instead.

Verified Somfy Specifications

Every figure below comes from the Somfy Pro e-catalogue page for reference 1164261.

Crown, Drive and Bracket Fit on LT60

An LT60 motor reaches the tube through a crown at the head and a drive wheel at the shaft. Somfy matches the pair to the tube profile, and a mismatch shows up as slip under load on a heavy awning. The Octagonal LT60 70mm Crown and Drive Set covers the 70mm octagonal tube that most 600 Series exterior work uses. Somfy lists it as the 70mm Octagonal LT60 Set under reference 9012247.

Check two things at the tube before you commit to a set. The profile has to match, octagonal against octagonal, and the internal diameter has to clear the 2.37 in Somfy publishes for this motor. A 70mm octagonal tube gives you room on both counts.

The bracket carries the load the crown transmits. A star head needs an LT60 star bracket rated for 80 Nm, mounted square to the tube so the motor runs without side load. Somfy publishes no weight figure for reference 1164261, and the motor still lands heavier than an LT50. Two people handle the lift on a long awning tube.

RTS Pairing and Limit Setting

The receiver inside the head answers Radio Technology Somfy at 433.420 MHz across 12 channels, with rolling code security. Somfy publishes a 164.05 ft open field range, and masonry, metal fascia and glass all cut into that figure on a real building. Mount the transmitter with line of sight where the layout allows it.

A Situo 1 Channel RTS Pure remote handles a single awning or a single shutter. You pair it at the motor, drive the fabric to each end of travel, and record the limits into the electronic limit switch. Somfy gives this motor a 200 turn capacity, which covers a tall shutter curtain without a second thought.

One note on the catalog: the product page for 1164261 lists a maintained rocker switch among its compatible parts. A maintained rocker switch drives a 4-wire motor through a hard-wired circuit. This SKU runs 3 wires and takes its commands over radio, so an RTS transmitter is the control path here. Our catalog team has the correction queued.

Power and Cable Notes

Somfy supplies the 680R2 with a 9.84 ft SJTW 3-wire cable, detachable at the motor head, on a 120V 60Hz circuit with a published 108 to 126 V window. The motor draws 3.4 A and 390 W while it runs, which asks for a dedicated circuit on a bank of awnings. Class I insulation makes the ground conductor part of the safety path, and an electrician terminates it accordingly.

IP 44 covers splashing water from any direction, the rating an exterior awning motor needs inside a tube under a hood. Somfy rates the motor from -4 to 158 F in service and -4 to 176 F in storage, with 4 minutes of thermal protection. A run that trips the thermal cutout wants a rest, and a shutter that trips it often points at a binding guide rail or an undersized motor.

Ready to order? The Somfy LT60 680R2 Altus RTS motor ships with the star head and the detachable SJTW cable. Add the crown and drive set that matches your tube, and add a Situo remote if the job has no transmitter on site yet.

Frequently Asked Questions

What tube does the Somfy 680R2 fit?

Somfy publishes a 2.37 in minimum internal tube diameter for reference 1164261. A 70mm octagonal tube clears that figure with room for the crown and the drive. Measure the internal diameter of your tube before ordering, since outer dimensions hide the wall thickness that eats into the clearance.

How much torque does the Altus RTS 680R2 produce?

Somfy rates the motor at 80 Nm at 14 rpm. That places it above the 660R2 at 60 Nm and below the 6100R2 at 100 Nm in the 600 Series range. The rating suits large retractable awnings and wide rolling shutters that exceed the LT50 platform.

Does the 680R2 need a wired wall switch?

No. The motor carries an RTS receiver in the head and runs on a 3-wire supply, so control arrives over radio at 433.420 MHz. A Situo RTS remote or an RTS wall transmitter commands it. Jobs that require a hard-wired maintained switch use the 4-wire CMO version of this motor.

Which crown and drive set matches an LT60 motor?

Match the set to the tube profile. Somfy's 70mm Octagonal LT60 Set, reference 9012247, fits a 70mm octagonal tube on a 600 Series motor. A round tube takes a round LT60 crown and drive instead, and the set has to clear the 2.37 in minimum internal diameter this motor requires.

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