Torque is the number that rules a Sonesse 40 in or out of a job. The Somfy Sonesse 40 RS485 409R2 sits at the top of Somfy's wired RS485 Sonesse 40 range at 9 Nm, and it keeps the slim motor body that slides inside a 40 mm roller tube. Reference 1240564 covers that build with a round head and a two-way RS485 data path back to the controller.
Torque at the top of the RS485 Sonesse 40 range
Somfy builds the wired RS485 Sonesse 40 in several torque steps. The 404S2 carries light interior shades at 4 Nm. The 406A2 takes mid-weight fabric at 6 Nm. The 409R2 lifts 9 Nm, which is the reach a specifier needs once a roller runs wide blackout cloth, a lined dual shade, or a dense screen fabric on a slim tube.
Somfy names interior blinds and shades as the applications for this reference, and adds projection screens. That last one matters to AV integrators who want a quiet motor on a tensioned screen with a control system already speaking RS485. The 409R2 runs at 14 rpm. Higher torque trades against speed across the Sonesse 40 line, so a 9 Nm motor moves a long drop slower than a 4 Nm motor on the same tube. Plan the cue timing around that.
Tube fit starts at 1.46 inches
The motor body needs a tube with an inside diameter of 1.46 in (37 mm) or larger. Somfy publishes that figure across the Sonesse 40 line, and it decides the job before any other spec does. A 40 mm octagonal tube clears it. A 40 mm round aluminium tube with a 36 mm inside diameter does not, so read the tube's inside diameter rather than its outside label.
Somfy supplies the 409R2 with a round head. White ships as standard, with black and grey finishes available to match the rest of the hardware in the pocket. The head shape drives the bracket choice, covered further down.
Verified specifications
| Specification | Value |
|---|---|
| Somfy reference | 1240564 |
| Model | Sonesse 40 RS485 409R2 |
| Rated torque | 9 Nm (80 in-lb) |
| Rated speed | 14 rpm |
| Control | RS485, two-way, Somfy Digital Network |
| Power supply | 120V AC, 60 Hz |
| Consumption in operation | 114 W |
| Consumption in standby | 0.5 W |
| Noise level | 42 dB |
| Protection index | IP 31 |
| Minimum tube inner diameter | 1.46 in (37 mm) |
| Head | Round, white (black and grey available) |
| Applications | Interior blinds and shades, projection screens |
| Approval | UL |
| Warranty | 5 years |
Somfy publishes the electrical, acoustic and protection figures for reference 1240564 on its own product page. Torque, speed and the minimum tube diameter come from the Sonesse 40 RS485 data Somfy prints for the 409R2 build.
Crown, drive and bracket for a 40 mm tube
The motor reaches the tube through a crown and a drive wheel matched to the tube profile. Somfy's 400 Series sets cover the shapes a shade shop runs most.
- The Somfy LS40 Crown and Drive Set (9012224) fits the standard 40 mm round tube and is the baseline pairing for this motor.
- The Somfy LS40 Octagonal Rubberized Crown and Drive Set (9016655) suits a 40 mm octagonal tube, and the rubberized drive damps the start and stop knock that shows up on a hard-clip drive in a quiet room.
Bracket choice follows the head. A round head drops into a Somfy bracket or into a third-party motor plate cut for the Sonesse 40 profile. Installers working with RollEase hardware pair the motor with the Somfy RollEase 2 inch SkyLine Universal Motor Bracket and Idler Bracket (9016325), which carries the drive end and the idler end of a 2 inch pocket as one set.
Tube stock comes from the same 400 Series family. Somfy's 40 mm octagonal tube ships by the foot in 20 ft increments, which lets a shop cut a run of shades from one length and keep the drive profile consistent across an elevation.
SDN wiring and commissioning
RS485 gives the 409R2 a two-way channel. The motor reports its position and its status back up the bus, and a controller can address each motor on the run rather than firing a whole group. Somfy builds this into animeo IP and the wider Somfy Digital Network, which is the path a commercial job takes when a building management system owns the shade schedule.
Commissioning happens over the same pair. The Somfy RS485 Setting Tool (9017142) gives a technician direct control at the shade: set the upper limit, set the lower limit, assign the address, and confirm rotation before the ceiling closes. For bench work and bulk addressing from a laptop, Somfy's USB to RS485 Adaptor for SDN (9015260) puts the same bus in front of the SDN software.
Standby draw sits at 0.5 W. On a bank of thirty shades that figure adds up over a year, and it is one of the numbers a spec writer checks against an energy budget on a commercial floor.
Ordering notes for reference 1240564
Two details are worth settling before the purchase order goes out. Confirm the pigtail and connector against the motor you receive, since Somfy ships this reference in builds with and without a fast connector and the harness on site has to match. Confirm the tube inside diameter with a caliper rather than from the extrusion label, because the 1.46 in minimum leaves no slack on a 36 mm bore.
Head colour is the third item to lock. White ships as the default. Black and grey exist for pockets where the head stays in view, and they carry their own lead time.
The Somfy Sonesse 40 409R2 RS485 SDN Motor (1240564) ships from Shade Motors Direct with the full 400 Series hardware line beside it, so the crown, the drive, the bracket and the setting tool land in one order.
Frequently asked questions
What tube does the Sonesse 40 RS485 409R2 fit?
Somfy publishes a minimum tube inner diameter of 1.46 in (37 mm) for the Sonesse 40. A 40 mm octagonal tube clears that. A 40 mm round tube with a 36 mm bore does not. Measure the inside diameter before ordering the crown and drive, because the outside label alone will not settle the fit.
Which tool sets the limits on this motor?
The Somfy RS485 Setting Tool (9017142) plugs into the bus at the shade and sets the upper and lower limits, assigns the motor address, and confirms rotation. For bench work or addressing a full run from a laptop, the Somfy USB to RS485 Adaptor for SDN (9015260) connects the same bus to Somfy's SDN software.
Does the 409R2 need a separate low-voltage control wire?
The motor takes 120V AC power and a two-wire RS485 data pair. That data pair carries every command and every status report, so the job needs no additional low-voltage control run to each shade. Plan the bus topology with the controller vendor before the walls close.
Can the Sonesse 40 RS485 409R2 drive a projection screen?
Somfy lists projection screens among the applications for this reference. The 9 Nm rating and the 42 dB noise level suit a tensioned screen in a media room or a boardroom, and the RS485 path lets an AV control system trigger the screen alongside the projector and the lighting scene.
Shade Motors Direct is an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.
