Somfy builds the Sonesse 50 510S2 RH with a round motor head, and that one detail rules the bracket you order beside it. A star head bracket will not seat a round head. Installers who add a motor and a bracket to the same cart without checking the head profile send one of the two back. Match the bracket to the head, then match the crown and drive to the tube.
The round head sets the bracket
Round head and star head describe the shape of the drive collar at the control end of an LT50 motor. Somfy publishes reference 1001810 as the Sonesse 510S2 RH, and the RH suffix carries the round head. The Somfy LT50 Universal Motor Bracket (9410665) names 1001810 among its compatible references on Somfy's own product data, so it holds this motor with the horizontal and vertical adjustment that headbox work asks for. Somfy rates that bracket to 25 Nm of motor torque and 126 lb of system load, both of which clear the 10 Nm this motor produces.
Keep the two fit questions apart. The head shape governs the bracket. The tube profile governs the crown and drive.
Shades the 510S2 RH drives
Somfy lists this motor under interior window covering shades. The published end products run to roller blinds, Roman blinds, pleated and cellular blinds, Venetian blinds, projection screens, and zebra blinds. 10 Nm at 32 rpm carries a wide interior roller or a coupled bank of shades riding one tube, and 32 rpm keeps a tall drop moving instead of holding a room waiting through a slow travel. Somfy tunes the Sonesse platform for occupied rooms, which puts this motor in boardrooms, hotel suites, and bedroom banks.
Awnings and rolling shutters belong to the exterior LT50 range. This motor carries an IP 44 rating and an interior application listing, and Somfy builds separate awning references for weather-exposed work.
Verified specs for reference 1001810
| Torque | 10 Nm (88.5 in-lb) |
| Speed | 32 rpm |
| Power supply | 120 V AC, 60 Hz (108 to 132 V) |
| Rated current | 1.67 A |
| Power in operation | 200 W |
| Standby power | 0 W |
| Head type | Round |
| Limit switch | Mechanical, 46 turn capacity |
| Repeatability | +/- 5 |
| Minimum tube inner diameter | 1.85 in (47 mm) |
| External diameter | 1.77 in |
| Unwrapped length | 24.13 in |
| Riveting position distance | 23.23 in |
| Weight | 6.57 lb |
| Cable | SJTW, 4 conductor, white, 9.84 ft, stripped ends |
| Operating temperature | -4 to 140 F |
| Storage temperature | -4 to 176 F |
| Protection index | IP 44 |
| Insulation class | Class I |
| Thermal protection | 4 min |
| Approval | UR |
| Warranty | 5 years |
Figures come from Somfy's published product data for reference 1001810.
Tube, crown and drive fit
Somfy sets the minimum internal tube diameter at 1.85 in, or 47 mm. A 2 in tube clears that. A 1.5 in tube will not take this motor at all, and no adaptor closes that gap. Measure the inside of the tube, not the outside, since wall thickness eats the difference you need.
Pick the crown and drive from the tube profile. The Somfy LT50 2.5" Round Crown and Drive Set (9012231) suits a round 2.5 in tube, the profile most interior roller fabricators cut. For an octagonal tube, the Somfy Octagonal LT50 70mm Crown and Drive Set (9012234) keys into the flats and holds the motor against rotation under load. Somfy builds the drive wheel as a snap-on part, so the assembly goes together at the bench without tools.
One crown and drive set covers one motor. Order a set per tube.
Wired control, limits and install notes
This reference ships with a 4 conductor SJTW cable, 9.84 ft, white, with stripped ends. Two conductors take the up and down commands, one returns the neutral, and one carries the ground that Class I insulation requires. A maintained or momentary wired switch drives the motor on its own. A dry contact relay output from a building control system drives it the same way, which is the path most commercial jobs take.
Standby draw sits at 0 W, so a bank of 20 shades on a floor adds nothing to the panel between moves. Run the shade circuit on its own breaker and keep the motor leads out of the data tray. Somfy builds the Sonesse 50 line with matching radio and digital references, so a project that later adds a control bus can keep the same motor platform across every opening.
Limits on this reference run on a mechanical head with a 46 turn capacity and rapid adjustment, so the setter turns the dials at the motor head and watches the shade rather than running a programming sequence from a remote. Somfy publishes repeatability of +/- 5, which holds a hem bar in line across a coupled bank once you set the bottom limit from the same reference point on every shade.
Pocket depth comes from the unwrapped length of 24.13 in plus the bracket and the idler end. Add clearance before the shop cuts the headbox. The riveting position sits 23.23 in along the body for fabricators who pin the tube. At 6.57 lb, this motor wants the bracket fastened into structure or a steel headbox rail, never into drywall alone.
Thermal protection cuts in after 4 min of continuous run and resets once the motor cools. Long commissioning sessions on a tall shade benefit from a pause between cycles. Operating range runs from -4 to 140 F, which covers any conditioned interior and a sunroom in July.
Parts to order with the 510S2 RH
The Somfy Sonesse 50 510S2 RH Standard 120V 4-Wire Motor (1001810) ships as the motor and its cable. Add the crown and drive set for your tube profile and the LT50 Universal Motor Bracket (9410665) for the round head, and the assembly is complete at the bench. Install crews on repeat work keep both crown sets on the van, since fabricators switch between round and octagonal tube from job to job.
Pair this motor with an idler end that matches the same tube profile, and confirm the switch or relay module you plan to use carries a maintained or momentary contact rated for 1.67 A at 120 V.
Frequently asked questions
What tube does the Sonesse 50 510S2 RH fit?
Somfy sets the minimum internal tube diameter at 1.85 in, or 47 mm. A 2 in or 2.5 in round tube clears that, as does a 70 mm octagonal tube with the matching crown and drive set. Measure the inside diameter of the tube. A 1.5 in tube will not accept this motor.
Which bracket holds a round head motor?
Use the LT50 Universal Motor Bracket (9410665). Somfy names reference 1001810 among its compatible products and rates it to 25 Nm of motor torque with a 126 lb system load. A star head bracket will not seat the round collar on this motor, so match the bracket to the head profile before you order.
How does this motor get its commands?
The 510S2 RH runs on a 4 conductor SJTW cable with stripped ends. A wired wall switch drives it on its own, and a dry contact relay output from a building control system drives it the same way. Limits set at the motor head with mechanical rapid adjustment, with a 46 turn capacity.
How much shade will 10 Nm carry?
10 Nm at 32 rpm covers a wide interior roller or a coupled bank of shades on a single tube. Somfy lists the reference for roller blinds, Roman blinds, pleated and cellular blinds, Venetian blinds, projection screens, and zebra blinds. Size from the finished weight of the fabric, the tube, and the hem bar together.
Shade Motors Direct is an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.
