Somfy 540R2 RTS CMO 120V 3-Wire Motor (1051477)
Somfy 540R2 RTS CMO 120V 3-Wire Motor (1051477)
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Somfy LT50 540R2 CMO RTS Motor -- wireless exterior motor with manual override
The Somfy LT50 540R2 CMO is a wireless, radio-controlled exterior tubular motor with a Compact Manual Override (CMO), letting the shade or awning be operated by hand crank if power is unavailable. It delivers 40Nm (354" lb) at 14 rpm for awnings and rolling shutters.
Benefits
- Compact Manual Override (CMO) for hand-crank operation during a power outage
- Radio Technology Somfy (RTS) -- no control wiring back to the motor required
- Detachable power cable at the motor head
- 5-year Somfy warranty
Specifications
| Torque / Speed | 40 Nm (354 in-lb) / 14 rpm |
| Control | RTS (433.42 MHz radio) |
| Override | Compact Manual Override (CMO) |
| Power supply | 120V AC, 60Hz |
| Warranty | 5 years |
Compatible with: LT50 crown and drive sets, LT50 CMO override hardware, 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 torque and speed does the 540R2 RTS CMO deliver?
Somfy rates part 1051477 at 40 Nm of torque and 14 rpm. It is a 120V LT50 motor with a built-in RTS receiver, made for awnings and rolling shutters, and it carries Somfy's 5-year warranty.
What does CMO mean?
CMO stands for Compact Manual Override. If power is lost, you can run the awning or shutter by hand with a crank. Our store carries the CMO Awning Override Shaft, 100mm with Geiger eye (9707287) for this setup.
What tube does it fit, and how is it powered?
Somfy lists a minimum tube inside diameter of 1.85 in. The motor runs on 120V AC with a 1.8 A rated current and a 210 W draw, and it ships with a 12.3 ft, 3-wire SJTW cable. The RTS receiver replaces control wiring, not the power feed.
Which remotes work with it?
Any Somfy RTS transmitter works, including the Telis 1 Channel and Telis 4 RTS Patio remotes (1810643, 1810645) and the Situo 5 Channel RTS Pure remote (1870575). The motor stores up to 12 transmitters, and Somfy lists an open-field range of 656.2 ft.
How are the limits set?
Somfy lists an electronic limit switch for this motor. The installer programs the upper and lower stops with an RTS remote during setup, and the motor stores those positions.
Can I run it from my phone or add wind protection?
Yes. Somfy lists TaHoma switch compatibility, so the TaHoma Switch (1871037) adds app and voice control. For wind protection, the Eolis 3D WireFree RTS Wind Sensor (1816081) mounts on the awning and signals the motor to retract.
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How this motor compares
Verified Somfy specs for this motor and its closest alternatives.
| Specification | You're viewing
Somfy 540R2 RTS CMO 120V 3-Wire Motor (1051477)
| 
Somfy 540R2 CMO 120V 4-Wire Motor (1049026)
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Somfy 535A2 RTS CMO 120V 3-Wire Motor (1047306)
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Somfy 550R2 RTS CMO (1051466)
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|---|---|---|---|---|
| Price | ||||
| Torque (Nm) | 40.0 | 40.0 | 35.0 | 50.0 |
| Speed (rpm) | 14 | 14 | 20 | 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 | LT50 |
| Manual crank override | Yes | Yes | Yes | Yes |
| What's different | The product on this page | Same size, Wired 4-wire control | 35.0 Nm instead of 40.0 | 50.0 Nm instead of 40.0 |
| Buy | Currently viewing | View details | View details | View details |
