An 80 Nm tubular motor earns its place where a rolling shutter stops behaving like a window covering and starts behaving like a wall. Wide aluminum shutter curtains and large cassette awnings put loads on a drive train that a 25 Nm LT50 motor cannot answer. Somfy built the 600 Series for that end of the range, and the LT60 680R2 CMO 120v 4-Wire Motor (1164013) sits in the middle of it with 80 Nm of torque, a hand crank override, and a plain four wire control connection.
Sizing an LT60 motor for a heavy shutter
Installers size a tubular motor from the weight of the curtain, the diameter of the roll, and the friction the guide rails add. An aluminum foam filled shutter slat weighs far more per square foot than fabric, and a storefront closure can reach 12 feet of width before anyone calls it oversized. Torque demand climbs with the radius of the roll as the curtain builds on the tube.
Somfy publishes 80 Nm for the 680R2, which converts to 708 in-lb. That figure covers rolling shutters and awnings that pass the ceiling of the LT50 platform. The 680R2 turns at 14 rpm, a deliberate pace for a heavy curtain, and it draws 285 W while it runs.
The number in the model code carries the specification. Somfy writes 680R2 as 6 for the 60 series tube, 80 for the newton meters, and R2 for the speed class. A buyer reading 6100R2 on a shelf label knows the motor above this one produces 100 Nm.
The 600 Series platform behind the 680R2 CMO
Somfy positions the 600 Series for exterior work. Rolling shutters take the largest share, with retractable awnings and heavy exterior screens filling the rest. The motor body measures 2.36 inches across, which puts it in a different tube class from every Sonesse and LT50 motor in the catalog.
Somfy rates the 680R2 CMO at IP 44, so rain and wind driven spray reach the housing without consequence. The published operating range runs from minus 4 F to 158 F. A shutter box on a west facing wall in Phoenix stays inside that window through August.
The CMO suffix marks the compact manual override. Somfy fits a gear takeoff at the motor head that accepts an override shaft, and an operator turns the shutter by hand after the power drops. UR approval and a 5 year Somfy warranty cover the motor.
Somfy verified specifications
| Specification | Somfy published value |
|---|---|
| Torque | 80 Nm (708 in-lb) |
| Speed | 14 rpm |
| Control | Standard 4-wire, no radio receiver |
| Override | Compact manual override |
| Power supply | 120V AC, 60 Hz (108V to 126V) |
| Power, operating | 285 W |
| Power, standby | 0 W |
| Noise | 65 dB |
| Protection rating | IP 44 |
| Motor diameter | 2.36 in |
| Minimum internal tube diameter | 2.37 in |
| Operating temperature | -4 F to 158 F |
| Insulation class | Class I |
| Warranty | 5 years |
| Approval | UR |
Somfy publishes power draw, noise, protection rating, voltage, and warranty on the product page for reference 1164013. Torque, speed, motor diameter, minimum tube diameter, and temperature range come from Somfy's e-catalogue entry for the 680R2 platform, which the CMO and radio versions share.
Crown and drive sets that fit a 70mm octagonal tube
A tubular motor never touches the tube. A crown carries the fixed head, a drive wheel keys into the tube wall, and the pair together decide whether the motor fits at all. Somfy machines those parts per tube profile, so the tube a fabricator ordered dictates the adapter set.
The 70mm octagonal profile carries most North American rolling shutter work in this torque class. Somfy's own listing for the Octagonal LT60 70mm Crown and Drive Set (9012247) names the 680R2 CMO among the motors it serves, along with the 660R2 and 6100R2 in both wired and radio form. The set combines crown 9705340 and drive 9761002 in one part number.
Shops running the DS78 profile order the DS78 LT60 Crown (9705341) instead and pair it with the drive that matches their tube. Measure an octagonal tube across the flats before you order. A tube that reads 70mm across the flats takes the 70mm set, and Somfy's 2.37 inch minimum internal diameter tells you whether the motor body clears the inside wall at all.
Wiring a motor that carries no radio receiver
The 680R2 CMO answers to a hard wired control, and nothing else. Line, neutral, ground, plus an up conductor and a down conductor land on a maintained rocker switch, a momentary switch, or a relay output from a control panel. An RTS remote sends a signal this motor never hears, and a DecoFlex wall transmitter does the same. Buyers who want radio control order the Altus RTS 680R2 under reference 1164261.
Somfy specifies SJTW cable for exterior 600 Series motors. Installers who need to extend a run or replace a damaged lead pull from the 4-Conductor Motor Cable SJTW (9012110), sold per foot. Two motors on one switch require an interface, because paralleling the up and down conductors back feeds the winding on the second motor.
Limit setting on this motor happens at the head. An installer runs the shutter to the closed position, sets the lower stop, runs it open, and sets the upper stop. Budget access to the motor head in the shutter box before the cladding goes on. Retrofit crews learn that lesson once.
Hand crank operation after the power drops
A rolling shutter that stays closed during an outage turns a storefront into a locked box, and a shutter stuck open leaves the glass exposed through a storm. The compact manual override answers both cases. An operator engages an override shaft at the motor head and cranks the curtain to the position the situation calls for.
Order the override shaft with an eye that matches your hardware, and size the shaft to the drop from the shutter box to a reachable height. Somfy sells CMO shafts in several lengths with a Geiger eye or a plain loop. Confirm the eye style against the crank handle already on site, because the two halves have to mate.
Frequently asked questions
Does the LT60 680R2 CMO work with a Somfy RTS remote?
No. Somfy builds this reference as a standard 4-wire motor with no radio receiver inside the housing. Control comes from a wired switch or a relay. Buyers who want RTS remotes, DecoFlex wall switches, or TaHoma control order the Altus RTS 680R2, reference 1164261, which carries the same 80 Nm and 14 rpm output with a receiver built in.
What size tube does the 680R2 need?
Somfy publishes a minimum internal tube diameter of 2.37 inches for the 680R2 platform, with a motor body of 2.36 inches. The 70mm octagonal profile suits most rolling shutter work in this class, and Somfy's 9012247 crown and drive set covers it. Measure an octagonal tube across the flats, never corner to corner.
How much torque does 80 Nm give me in practice?
Somfy rates the 680R2 at 80 Nm, or 708 in-lb, at 14 rpm. That output suits large aluminum rolling shutters and wide cassette awnings past the range of a 50mm LT50 motor. Curtain weight and roll diameter drive the calculation, so run the numbers for your assembly rather than sizing from width alone.
Can this motor sit outdoors in a shutter box?
Yes. Somfy rates the 680R2 CMO at IP 44 and publishes an operating range of minus 4 F to 158 F. The motor belongs inside a shutter box or an awning tube, shielded from standing water. Leave access to the motor head so a technician can reach the limits and the override takeoff later.
The Somfy LT60 680R2 CMO 120v 4-Wire Motor (1164013) ships as a genuine Somfy reference with the 5 year factory warranty. Add the 70mm octagonal crown and drive set that matches your tube, and price the override shaft with the rest of the shutter hardware. Shade Motors Direct is an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.
