Somfy LS40 409R2 Sonesse RTS 120V Motor (1240382)
Somfy LS40 409R2 Sonesse RTS 120V Motor (1240382)
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Somfy LS40 409R2 Sonesse RTS 120V Motor -- wireless interior motor
The LS40 409R2 RTS is a wireless, radio-controlled 120V motor delivering 9Nm at 14rpm for interior shades and heavier blinds, with a Fast Connector for quick power hookup -- no control wiring back to the motor required.
Benefits
- Radio Technology Somfy (RTS) -- no control wiring back to the motor required
- Fast Connector for quick, tool-free power hookup
- Fits small-diameter tubes (38mm+ internal diameter)
- Pairs with Situo/Telis handheld remotes and DecoFlex wall switches
- 5-year Somfy warranty
Specifications
| Torque / Speed | 9 Nm (80 in-lb) / 14 rpm |
| Control | RTS (433.42 MHz radio) |
| Power supply | 120V AC, 60Hz |
| Cable | Fast Connector |
| Warranty | 5 years |
Compatible with: 40mm octagonal and round roller tubes, 400 Series crown and drive sets, Situo/Telis RTS remotes, RTS wall switches
Official Somfy documentation
Sold by ShadeMotorsDirect -- an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.
Common questions
What is the Sonesse 40 RTS 409R2 motor?
It is a 120V Sonesse 40 motor for interior shades with a built-in RTS radio receiver, so no control wiring runs back to the motor. Somfy lists part 1240382 with an RH head and a Fast Connector.
How is it powered?
It runs on 120V/60Hz and draws 120 W in operation and 0.5 W in standby. The Fast Connector takes Somfy extension cables from 1.4 ft to 24 ft, including the 10.4 ft cable with plug (9020791).
What tube does it fit?
Somfy lists a minimum tube inside diameter of 36 mm, matched to a 40mm round aluminum tube. The compatible parts on this page include LS40 crown and drive sets and a 40mm octagonal tube.
Which remotes and switches work with it?
Any Somfy RTS transmitter works on its 433.420 MHz radio, including the Situo 1 RTS Pure remote (1870571), Telis handheld remotes and DecoFlex RTS wall switches.
Can I control it from my phone or a voice assistant?
Yes, through a TaHoma switch (1871037) and the TaHoma by Somfy app, which also adds voice-assistant control. RTS is one-way radio, so the app sends commands but cannot report the shade's position.
How quiet is it?
Somfy rates it at 40 dB with an IP 44 rating, and it carries a 5-year Somfy warranty. The low noise suits bedrooms, offices and other rooms where motor sound would stand out.
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How this motor compares
Verified Somfy specs for this motor and its closest alternatives.
| Specification | You're viewing
Somfy LS40 409R2 Sonesse RTS 120V Motor (1240382)
| 
Somfy Sonesse 40 409R2 RS485 SDN Motor (9Nm, 14rpm) (1240564)
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Somfy LS40 404S2 Sonesse RTS 120V Motor without fast connector (1001636)
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Somfy Sonesse 40 409R2 WT 120V 4-Wire Motor (fast connect) (1240379)
|
|---|---|---|---|---|
| Price | ||||
| Torque (Nm) | 9.0 | 9.0 | 4.0 | 9.0 |
| Speed (rpm) | 14 | 14 | 36 | 14 |
| Control | RTS radio | RS485 (SDN) | RTS radio | Wired 4-wire |
| Power | 120V AC | 120V AC | 120V AC | 120V AC |
| Motor family | Sonesse 40 | Sonesse 40 | Sonesse 40 | Sonesse 40 |
| What's different | The product on this page | Same size, RS485 (SDN) control | 4.0 Nm instead of 9.0 | Same size, Wired 4-wire control |
| Buy | Currently viewing | View details | View details | View details |
