Somfy · 40 series · ref. 1240562
Sonesse 40 RS485 404S2 — 120 V
The 120 V version of the integration motor. Two-way RS485 bus, no radio, no gateway, no charging.
Price
$731 MSRP
Motor only. Wiring and configuration tool extra.
Request a quote for a price tailored to your project: more motors, better price.Prices subject to change without notice.
- Torque 4 Nm
- Noise 42 dB
- Min. width 22 3/4 in
- Power supply Wired 120 V
- Protocol RS485
Motor 09 / 19 — All 19 motors
- 01 · Sonesse 28 WireFree RTS — External Battery$308 MSRP
- 02 · Sonesse 30 RTS 24V DC$470 MSRP
- 03 · Sonesse 30 RS485 24V DC$577 MSRP
- 04 · Sonesse 30 Zigbee 24V DC$550 MSRP
- 05 · Roll Up 28 WireFree RTS V2 — lithium-ion battery$341 MSRP
- 06 · Sonesse 28 WireFree RTS — lithium-ion battery$359 MSRP
- 07 · Sonesse ULTRA 30 WireFree Zigbee — lithium-ion battery$424 MSRP
- 08 · Sonesse ULTRA 30 WireFree RTS — lithium-ion battery$404 MSRP
- 09 · Sonesse 40 RS485 404S2 — 120 V$731 MSRP
- 10 · Sonesse 40 Zigbee 404S2 — 120 V$608 MSRP
- 11 · Sonesse 40 RTS 404S2 — 120 V$579 MSRP
- 12 · Sonesse 40 WT 404S2 — 120 V$355 MSRP
- 13 · Sonesse 40 Zigbee 409R2 — 120 V$639 MSRP
- 14 · Sonesse 40 WireFree RTS — lithium-ion battery$589 MSRP
- 15 · Sonesse 40 WireFree Zigbee — lithium-ion battery$703 MSRP
- 16 · Maestria+ 50 RTS 510A2$642 MSRP
- 17 · Maestria+ 50 RTS 525A2$723 MSRP
- 18 · Maestria+ 50 RTS 535A2$790 MSRP
- 19 · Maestria+ 50 RTS 550R2$819 MSRP
01 — At a glance
What sets this motor apart.
This motor combines ordinary 120 volt power with the RS485 protocol. Each motor has a unique address on the bus and communicates both ways: the system knows the actual position of each blind at all times.
Somfy places it in its SDN network, designed for projects where the reliability of a wired link matters more than the convenience of radio. It integrates directly with third-party systems and with the animeo IP solar manager.
It is built for buildings: education, healthcare, hospitality, offices, retail, transportation, recreation — and high-end automated homes.
Addressable RS485 bus
Each motor has its own address. No radio, no cloud gateway.
Two-way communication
The system knows the actual position of each blind at all times.
4 newton-metres at 36 rpm
Fast and versatile, like the other 404S2 models in the 400 series.
42 dB
Designed for Silence range, with four noise-reduction patents.
UL listed
UL-listed motor, designed for commercial and institutional construction.
Fast connector
Tool-free connection, like the other motors in the 400 series.
02 — Spec sheet
The numbers, straight up.
Somfy documentation
All the official documentation (13 documents, French and English)
Specifications checked one by one against the Somfy Pro Canada catalogue on October 1, 2026.
| Torque | 4 Nm |
|---|---|
| Speed | 36 rpm |
| Noise level | 42 dB |
| Protocol | RS485 — Somfy SDN network |
| Communication | Two-way, addressable |
| Power supply | 120 V AC, 60 Hz |
| Power draw in operation | 114 W |
| Standby power | 0.5 W |
| Rated current | 0.95 A |
| Pulling force | 15.44 lb |
| Motor length | 20.24 in (514 mm) |
| Minimum blind width | 22 3/4 in |
| Motor diameter | 40 mm |
| Compatible tube | 2 in and 2 in heavy duty |
| Limit capacity | 250 turns |
| Connection | Fast connector, 1.64 ft cable |
| Weight | 2.76 lb |
| Protection rating | IP 31 |
| Insulation class | Class II |
| Certification | UL |
| Carbon footprint | 54.4 kg CO₂ over the life cycle |
| Operating temperature | 0 to 60 °C |
| Warranty | 5 years |
Official Somfy documentation
Every official Somfy document for this motor, gathered in one place by Le Gars des Stores, certified Somfy Expert. The PDFs open on Somfy's website.
In English (11)
Installation and use
Programming
Technical catalogues
Home automation integration
Wiring diagrams
Brochures and flyers
Environment
03 — Which blinds
The right blind for this motor.
22 3/4 in
Blind width
This motor requires a blind at least 22 3/4 in wide.
Below this width, the motor does not fit in the aluminum tube the fabric rolls onto.
It shares the exact dimensions of the Sonesse 40 Zigbee 404S2: same body, same 20.24 in length, same 4 newton-metre torque. Only the communication method changes.
What to consider before choosing
- No remote works with this motor. It has neither RTS nor Zigbee. Control goes through the RS485 bus, a DecoFlex SDN keypad or a third-party automation system. An RTS receiver for SDN is available to add radio control.
- Commissioning requires an RS485 configuration tool, which assigns addresses and sets the limits. This is not a motor you program with a remote on site.
- It draws 0.5 W on standby, compared with 0.05 W for the Zigbee 120 V version. In a building with a hundred blinds, the difference is 45 W around the clock.
- For an ordinary home, a Zigbee or RTS motor meets the need with less complexity and at a lower cost. This motor is justified when the project requires a deterministic wired link and integration with a building management system.
04 — Compatibility and power
How it's powered and controlled.
- Power supply
- Wired 120 V
- Plugs into an ordinary outlet or is hard-wired. The most powerful for its size.
- Protocol
- RS485
- Wired, for building management systems (Somfy SDN). Mainly for commercial projects.
- Compatible tube
- 2 in and 2 in heavy duty
- Family: 40 series
- Length
- 20.24 in
- Min. width: 22 3/4 in
05 — Frequently asked questions
What customers ask.
Is there a 120 volt RS485 blind motor?
Yes. The Sonesse 40 RS485 404S2 combines ordinary 120 V power with a two-way RS485 bus. It delivers 4 newton-metres at 36 rpm and runs at 42 dB.
How is it different from the 24 V Sonesse 30 RS485?
The Sonesse 40 plugs into ordinary 120 V power, with no transformer or power distribution panel, and offers 4 newton-metres instead of 2. The 24 V Sonesse 30 remains preferable when the building is already wired for low voltage or when Power over Ethernet is wanted.
Is this motor certified for commercial construction?
It is UL listed, a sought-after selling point in commercial and institutional construction.
Can it be controlled with a remote?
Not directly. It has neither RTS nor Zigbee. Control goes through the bus, a DecoFlex SDN keypad or a third-party system. An RTS receiver for SDN can add radio control.
How much power does it draw at rest?
0.5 W on standby, compared with 0.05 W for the Zigbee 120 V version. In a building with a hundred blinds, the difference is 45 W around the clock.
What type of building is it suited for?
Education, healthcare, hospitality, offices, retail, transportation, recreation, and high-end automated homes. It is justified when the project requires a deterministic wired link and integration with a building management system.
Do you install in Montreal, Sherbrooke and the Eastern Townships?
Yes. Le Gars des Stores serves the West Island and Montreal, Vaudreuil-Dorion, the South Shore, the North Shore, western Laval and the Eastern Townships (Sherbrooke, Magog); elsewhere, depending on the project. We handle measuring, made-to-measure ordering, installation and programming.
06 — Same family
Compare with its neighbours.
40 series — compatible tube: 2 in and 2 in heavy duty
| Motor | Length | Min. width | Torque | Noise | Power supply | Price | View page |
|---|---|---|---|---|---|---|---|
| Sonesse 40 RS485 404S2 — 120 V — this page | 20.24 in | 22 3/4 in | 4 Nm | 42 dB | Wired 120 V | $731 MSRP | |
| Sonesse 40 Zigbee 404S2 — 120 V | 20.24 in | 22 3/4 in | 4 Nm | 42 dB | Wired 120 V | $608 MSRP | |
| Sonesse 40 RTS 404S2 — 120 V | 20.47 in | 23 in | 4 Nm | 42 dB | Wired 120 V | $579 MSRP | |
| Sonesse 40 WT 404S2 — 120 V | 18.82 in | Confirmed when measuring | 4 Nm | 42 dB | Wired 120 V | $355 MSRP | |
| Sonesse 40 Zigbee 409R2 — 120 V | 21.46 in | 24 in | 9 Nm | 40 dB | Wired 120 V | $639 MSRP | |
| Sonesse 40 WireFree RTS — lithium-ion battery | 25.59 in | 28 1/8 in | 3 Nm | 49 dB | Built-in lithium-ion battery | $589 MSRP | |
| Sonesse 40 WireFree Zigbee — lithium-ion battery | 25.59 in | 28 1/8 in | 4 Nm | 40 dB | Built-in lithium-ion battery | $703 MSRP |
Request a quote for a price tailored to your project: more motors, better price.Prices subject to change without notice.
Certified Somfy Expert
A motorization project?
Certified Somfy Expert, authorized distributor and installer. Sales, measuring, installation and programming: one team, since 2014.
The West Island and Montreal, Vaudreuil-Dorion, the South and North Shores, western Laval and the Eastern Townships. Elsewhere, depending on the project.
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