Somfy Altus RTS 550R2 (1038170)
Somfy Altus RTS 550R2 (1038170)
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LT50 Altus RTS 550R2 -- 50 Nm universal radio motor for shutters, screens, and awnings
The Altus RTS 550R2 is a heavy-duty LT50-series 120V tubular motor with the RTS radio receiver built in, delivering 50 Nm of torque at 14 rpm for large rolling shutters, retractable awnings, and exterior solar screens with no separate receiver to install.
Benefits
- 50 Nm (440 in-lb) of torque at 14 rpm for large, heavy applications
- Built-in RTS receiver runs on Somfy remotes and wireless wall switches
- Compatible with Somfy RTS wind and sun sensors, timers, and TaHoma
- Rapid-adjustment push buttons make limit setting fast and tool-free
- Star drive head fits the full LT50 crown and drive ecosystem
- Genuine Somfy quality, backed by a 5-year warranty
Specifications
| Torque / Speed | 50 Nm (440 in-lb) / 14 rpm |
| Radio Frequency | 433.420 MHz |
| Control | Radio Technology Somfy (RTS), built-in receiver |
| Head type | Star |
| Power | 120V AC, 60 Hz |
| Limit type | Mechanical, rapid-adjustment push buttons |
| Warranty | 5 years |
Compatible with: LT50 / 500 Series tubes, crowns, drives, and brackets
Official Somfy documentation
- LT50 / 500 Series – Databook (PDF)
- RTS Pocket Programming Guide (PDF)
- LT50 Altus RTS 550R2 – Somfy Pro Product Page
Sold by ShadeMotorsDirect -- an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.
Common questions
What is the Altus RTS 550R2 used for?
Part 1038170 is a heavy-duty LT50 motor for large rolling shutters, retractable awnings and exterior solar screens. Its RTS radio receiver is built in, so there is no separate receiver to install.
What torque and speed does it deliver?
Somfy rates the 1038170 at 50 Nm and 14 rpm, with a star head and electronic limits that cover up to 250 turns. It needs a tube with an inside diameter of at least 1.85 in and runs at 55 dB.
How is it powered and wired?
It runs on 120V/60Hz, draws 2.1 A and uses 250 W in operation. The motor comes with a removable 9.84 ft SJTW 3-wire cable. Somfy rates it IP 44 for exterior use.
Which remotes work with it?
Any Somfy RTS transmitter works, including the Telis 1 and Telis 4 RTS Patio remotes (1810643, 1810645), the Situo 5 Soliris RTS Pure II (1870579) and DecoFlex RTS wall switches. The motor stores 12 channels, with an open-field range of 656.2 ft.
Can it run on a schedule or from an app?
Yes. The Telis 1 Chronis RTS timer (1805237) runs it at set times, and a Somfy TaHoma Switch (1871037) adds app and voice control. RTS is one-way radio, so the app sends commands without reporting position.
Is there a lighter-duty Altus RTS?
Yes. The Altus RTS 525A2 (1043423) delivers 25 Nm at 20 rpm for smaller shutters, awnings and screens. Choose the 550R2 when the load calls for 50 Nm. Both use LT50 star-head crowns, drives and brackets.
Couldn't load pickup availability
Replace an LT50 motor or build a new shade, screen or awning around it.
Replacing? Your fabric stays on the tube. Building new? Every part below is Somfy-matched to part 1038170.
123- 1Motor head Mounts to the bracket at the motor end.
- 2Crown Grips the inside of the tube.
- 3Drive Turns the tube.
Replacing a motor
-
1
Cut power, take it down
Turn off the circuit, then lift the roller out of its brackets.
-
2
Pull the old motor
Slide it out of the tube and take off its crown and drive.
-
3
Fit LT50 crown and drive
Pick the set for your tube, slide the new motor in and seat the star head in its bracket.
-
4
Pair and set limits
Pair your Somfy RTS remote, then set the top and bottom limits.
Not sure of your tube size or head type? Send us a photo of the label on your old motor. We'll confirm the part before you order. Ask us
Building something new
-
1
Measure the tube
Measure across the outside of the tube end and note its shape. That sets the crown and drive.
-
2
Pick the parts
Add the crown and drive, the motor bracket and a remote or switch from the list below.
-
3
Mount and fit
Fit the crown and drive, slide the motor into the tube and seat the head in its bracket.
-
4
Pair and set limits
Pair your Somfy RTS remote, then set the top and bottom limits.
Planning a new shade, screen or awning? Send us the size and tube. We'll build the parts list with you. Ask us
What the Altus RTS 550R2 needs to run
Somfy lists every part below as compatible with part 1038170. Pick one from each row.
1Control
Built-in RTS radio. Any Somfy RTS remote, wall switch or timer pairs with it.
2Tube fit
Match the crown and drive to your tube size and profile.
3Mounting
Holds the motor head and the idle end in place.
Somfy backs the Altus RTS 550R2 for 5 years. We handle the claim.
Somfy warranty on the Altus RTS 550R2, part 1038170.
- What Somfy covers
- Defects in materials and workmanship, for 5 years from purchase.
- If it fails
- Email us your order number. We arrange the replacement with Somfy.
- Where it comes from
- ShadeMotorsDirect is an authorized Somfy distributor. You get the US version, new in Somfy packaging.
- Returns
- Unopened items in original packaging. Ask us for an RA number before you ship.
- Questions
- Call or chat, 8:00 AM - 7:30 PM ET.
How this motor compares
Verified Somfy specs for this motor and its closest alternatives.
| Specification | You're viewing
Somfy Altus RTS 550R2 (1038170)
| 
Somfy 550R2 120V 4-Wire Motor (1051464)
| 
Somfy 540R2 Altus RTS 120V 3-Wire Motor (1240556)
| 
Somfy LT60 Altus RTS 660R2 (1162271)
|
|---|---|---|---|---|
| Price | ||||
| Torque (Nm) | 50.0 | 50.0 | 40.0 | 60.0 |
| Speed (rpm) | 14 | 14 | 14 | 14 |
| Control | RTS radio | Wired 4-wire | RTS radio | RTS radio |
| Power | 120V AC | 120V AC | 120V AC | 120V AC |
| Motor family | LT50 | LT50 | LT50 | LT60 |
| What's different | The product on this page | Same size, Wired 4-wire control | 40.0 Nm instead of 50.0 | 60.0 Nm instead of 50.0 |
| Buy | Currently viewing | View details | View details | View details |
Guides for this product
How to Install Somfy Roller Shutters With an Altus RTS Motor
Install a Somfy roller shutter motor: match the LT50 tube, crown, drive and bracket, wire 120V, then set the Altus... Read
SunSetter Awning Motor Replacement and How to Check a Somfy Fit
Replacing a SunSetter awning motor? Read the label, measure the tube and match the head to pick the genuine Somfy... Read
