The torque step past LT50
Installers reach for the Somfy Altus RTS 6100R2 when an awning or a rolling shutter outgrows the LT50 range. Somfy rates this motor at 100 Nm, 885 in-lb, at 14 rpm. That sits at the top of the 600 Series Altus RTS ladder, and it turns tube assemblies that sit above the rating of a 50 Nm motor. The housing carries an IP 44 rating and an operating range from -4 F to 158 F, so the motor lives outdoors in a hood or a shutter box through a full season cycle.
Part 1166289 ships with a 9.84 ft SJTW cable. Somfy prints the full designation as 6100R2 ALTUS RTS 100/14SJTW10F. The 100 and the 14 in that string carry the torque and the speed. Read both before you order, because the 600 Series holds several motors that look identical on a shelf.
Awnings and rolling shutters the 6100R2 drives
Somfy names two applications for this motor. One is the awning, folding arm and cassette alike, where the roller tube carries the full weight of fabric plus arm tension every time the assembly retracts. The other is the rolling shutter, where an aluminum or steel curtain adds mass with every slat. Both loads punish an undersized motor at the moment of start, not during the run.
Torque demand climbs with the roll diameter, so a wide awning on a fat tube asks more of the motor than the square footage alone suggests. Somfy publishes sizing tables in the 600 Series Databook, and the calculation runs on curtain weight, tube outside diameter and the built-up roll at the closed position. A 100 Nm motor gives you headroom on assemblies that a 60 Nm or 80 Nm motor would drive at the edge of its rating. Headroom buys motor life.
Somfy engineered the 600 Series around this class of work, and the five year warranty reflects that. The 6100R2 shares its platform with the CMO and standard wired variants, so a fabricator who stocks LT60 hardware can move between control types without changing crowns, drives or brackets.
Verified specifications
Every figure below comes from Somfy's own published record for part 1166289.
| Specification | Value |
|---|---|
| Official designation | 6100R2 ALTUS RTS 100/14SJTW10F |
| Torque | 100 Nm (885 in-lb) |
| Speed | 14 rpm |
| Power supply | 120V AC / 60 Hz |
| Consumption in operation | 430 W |
| Consumption in standby | 0 W |
| Current | 3.8 A |
| Control | Radio Technology Somfy, 433.420 MHz |
| Radio range, open field | 164.05 ft |
| Channels | 12 |
| Motor diameter | 2.36 in |
| Motor length | 29.13 in |
| Minimum tube inside diameter | 2.37 in |
| Head type | Star |
| Cable | SJTW, 9.84 ft |
| Sound level | 65 dB |
| Protection index | IP 44 |
| Operating temperature | -4 F to 158 F |
| Thermal protection | 266 F |
| Applications | Awning, rolling shutter |
| Warranty | 5 years |
Tube, crown and drive fit
The 6100R2 measures 2.36 in across the body and asks for a tube with a minimum inside diameter of 2.37 in. That single number rules out every 50 mm tube on the truck. Measure the inside of the tube, not the outside, and measure at the end where the motor enters.
Somfy pairs the motor to the tube with a crown and a drive. The crown locates the motor head end inside the tube and stops the body from spinning. The drive keys onto the output shaft and turns the tube. Both parts match one tube profile and one size, so a 70 mm octagonal tube needs 70 mm octagonal hardware. The Somfy Octagonal LT60 70mm Crown and Drive Set covers that case, and Somfy describes it as a 70 mm octagonal crown and drive adapter set for the LT60 motor, containing parts 9705340 and 9761002.
The opposite end of the tube takes an idler. Somfy supports the head end of the motor on a star bracket, since the 6100R2 carries a star head. A CMO head from a sibling motor will not seat in a star bracket, and the reverse holds too, so confirm the head against the bracket you already own before the tube goes up.
RTS control and pairing
Somfy builds the radio receiver into the motor, which is what separates the Altus RTS from the wired members of the 600 Series. You run line, neutral and ground to the motor and nothing else. No control conductor travels back to a switch, and no external receiver hangs in the hood. That saves conduit on a retrofit where the wall finish is already closed.
The motor answers on 433.420 MHz across 12 channels, with an open field range of 164.05 ft. Masonry, metal cladding and glass all cut into that figure, so plan a repeater on a long exterior run rather than counting on the open field number at a building corner. A Somfy Situo 1 Channel RTS Pure Remote drives a single motor and doubles as the programming tool for limits. Installers who run several awnings from one hand point at a multi channel Situo or a Telis instead.
Somfy sets limits through the remote on this platform. You pair the handset, drive the tube to the upper position, set it, drive to the lower position, set it, then confirm. The 600 Series Databook carries the button sequence, and the sequence differs from the wired LT60 motors, which take a limit setting tool at the head.
Install notes worth checking first
The motor runs 29.13 in long, which is a real constraint in a shallow cassette or a tight shutter box. Add the crown, the drive and the head bracket to that dimension and compare the total against the clear width inside the box before you cut a tube.
Current draw sits at 3.8 A at 120V, and consumption reaches 430 W in operation. A single 15 A circuit carries one motor with margin, though a bank of four exterior motors on shared power deserves a load check. Standby draw reads 0 W, so an idle installation costs nothing at the meter.
Thermal protection trips at 266 F. Somfy builds that cutout in to protect the windings during repeated cycling, and a motor that stops mid travel on a hot afternoon has told you the duty cycle is too aggressive for the load. Let it cool, then check the assembly for binding at the guides.
Sound level reaches 65 dB, which suits exterior work. An interior application in a bedroom or a boardroom belongs to the Sonesse family instead, where Somfy tunes the motor for quiet running.
The Altus RTS 6100R2, part 1166289, ships as a motor with its cable and nothing else. Order the crown and drive to match your tube, a star head bracket for the head end, an idler for the far end, and a handset if the job has no RTS control on site yet. Shade Motors Direct stocks the LT60 hardware alongside the motor, so one order covers the assembly.
Somfy backs the 6100R2 with a five year warranty, and the part stays current in the Somfy Pro catalog. Buy the motor and the crown set together and you skip the second freight charge that a missing 70 mm drive always causes.
Frequently asked questions
What torque does the Somfy Altus RTS 6100R2 produce?
Somfy publishes 100 Nm, which converts to 885 in-lb, at 14 rpm. That rating places the 6100R2 at the top of the Altus RTS 600 Series range and suits large awnings and rolling shutters. Somfy lists power consumption at 430 W in operation with 3.8 A of current draw on a 120V 60 Hz supply.
Which tube size fits the 6100R2?
The motor body measures 2.36 in in diameter and needs a tube with a minimum inside diameter of 2.37 in. A 70 mm octagonal tube works with the Somfy Octagonal LT60 70mm Crown and Drive Set, part 9012247. Match the crown and drive to your exact tube profile and size, since the pair fits one tube shape.
Does the 6100R2 need an external RTS receiver?
No. Somfy builds the RTS receiver into the motor head, so the installation takes line, neutral and ground with no control conductor. The motor answers on 433.420 MHz across 12 channels with an open field range of 164.05 ft. A Situo RTS handset pairs to it and sets the travel limits.
Where can the 6100R2 mount outdoors?
Somfy rates the motor at IP 44 with an operating range from -4 F to 158 F, which covers an awning hood or a rolling shutter box. Thermal protection trips at 266 F to guard the windings. Sound level reaches 65 dB, so interior rooms suit the quieter Sonesse family better than this exterior motor.
Shade Motors Direct is an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.
