Tube inner diameter settles the Somfy Sonesse 50 510S2 RS485 before torque enters the conversation. Somfy publishes a minimum tube inner diameter above 47 mm for reference 1002287, which puts the floor at 1.85 inches. Measure the inside of the tube before you order. A 50 mm octagonal tube with a thick wall can land under that figure and leave the motor nothing to seat against.
This is the 10 Nm member of the wired Sonesse 50 RS485 family, built for interior shading that a building system drives over the Somfy Digital Network.
Torque, speed and the shades the 510S2 carries
Somfy rates the 510S2 at 10 Nm (88.5 in-lb) and 32 rpm. That pairing suits wide interior rollers where the fabric roll gains weight across a long drop and the specifier still wants brisk travel. Somfy publishes a 47.2 dB sound level for this reference, quiet enough for a boardroom or a patient room.
Somfy lists six applications for 1002287: roller blinds, Roman blinds, pleated and cellular blinds, Venetian blinds, projection screens, and zebra blinds. Torque by itself will not tell you whether a given shade works. Fabric weight and roll diameter feed that answer, and our guide to sizing a Somfy shade motor walks the arithmetic.
Verified specifications for reference 1002287
| Specification | Somfy published figure |
|---|---|
| Official name | Sonesse 510S2 RS485 |
| Reference | 1002287 |
| Torque / speed | 10 Nm (88.5 in-lb) / 32 rpm |
| Control | RS485, Somfy Digital Network |
| Power supply | 120V AC, 60 Hz |
| Rated current | 1.66 A |
| Power consumption | 200 W |
| Standby power | 0.5 W |
| Sound level | 47.2 dB |
| IP rating | IP 44 |
| Protection class | Class I |
| Head type | Star head |
| Limit capacity | 300 turns |
| Minimum tube inner diameter | Above 47 mm (1.85 in) |
| Motor length | 26.5 in (673 mm) |
| Power cable | SJTW, 9.8 ft (3 m) |
| Data cable | RJ9 / RJ45, sold as a separate part |
| Operating temperature | -4 to 158 F (-20 to 70 C) |
| Approval | UR |
| Warranty | 5 years |
Figures come from Somfy's own data for this reference. Print them on your submittal and the shop floor will cut tube to match.
Crowns, drives and brackets that fit a star head
The 510S2 carries a star head. Pick the bracket to match that head, then pick the crown and drive to match the tube profile. Two parts decide the install: the crown that centers the motor inside the tube and the drive that turns it.
For 2.5 inch round tube, the LT50 2.5 inch round crown and drive set (9012231) seats the motor and transfers the 10 Nm into the tube wall. Fabricators running 70 mm octagonal tube take the octagonal LT50 70 mm crown and drive set (9012234) instead. Match the crown to the tube you already bought, never the reverse.
On the head end, the LT50 star head motor bracket (9410651) locks the star profile and holds the motor against rotation. Crews working inside a tight pocket often reach for the LT50 universal motor bracket (9410665), which gives more mounting options in a shallow headbox. Order the bracket with the motor. A missing bracket stops a shade install cold.
Wiring and addressing on the Somfy Digital Network
Power and data arrive on separate cables. Somfy fits a 9.8 ft SJTW power lead for the 120V supply and runs control over RS485 on an RJ9 or RJ45 data cable that ships as a separate part. Plan both runs during rough-in, because a finished ceiling makes a second pull expensive.
RS485 gives you two-way communication. Each motor on the bus answers with its position and its status, so a head end knows where every shade sits rather than guessing from the last command. That feedback is the reason specifiers put SDN in conference centers and hospital wings where a facilities team runs hundreds of shades from one interface.
Commissioning starts with addressing. The Somfy RS485 Setting Tool (9017142) gives a technician a handheld path to set addresses and tune limits at the shade. Programmers who prefer a laptop use the Somfy USB to RS485 Adaptor for SDN (9015260) with Somfy's configuration software. Most integrators carry both, since the handheld wins at the ladder and the laptop wins at the rack.
Limits, mounting and install notes
The 510S2 holds a 300 turn limit capacity, which covers tall interior drops without a second thought. Set the upper limit with the fabric wrapped and the hembar level, then set the lower limit at the sill line you want. Re-check both after the fabric relaxes over the first week.
Somfy rates the motor IP 44 and Class I, with an operating range of -4 to 158 F. Bond the ground conductor on a Class I motor. Keep the 200 W draw and the 1.66 A rated current in front of you when you size the circuit and count motors per breaker, and leave headroom for inrush when a row of shades starts together.
One figure trips crews more than any other on this platform: the 1.85 inch minimum tube inner diameter. A nominal 50 mm tube can measure tighter than its label. Caliper the tube.
Ordering the 510S2 and the parts around it
Order the motor on its product page here: Somfy Sonesse 50 510S2 RS485 SDN 120V Motor (1002287). Add the crown and drive for your tube profile, the bracket that matches the star head, a data cable for the bus, and the setting tool if this is your first SDN job.
Running a lighter shade on the same bus? The 6 Nm sibling gets its own guide: Sonesse 506S2 RS485 fit and wiring.
Frequently asked questions
What tube does the Sonesse 50 510S2 RS485 fit?
Somfy publishes a minimum tube inner diameter above 47 mm, or 1.85 inches, for reference 1002287. Any tube measuring 1.85 inches or more on the inside accepts the motor with the matching LT50 crown and drive. Measure the inside diameter with a caliper, since nominal tube labels can run tighter than the stated size.
How much torque does the 510S2 produce?
Somfy rates it at 10 Nm, which converts to 88.5 in-lb, at 32 rpm. That output drives wide interior roller shades, Roman blinds, Venetian blinds and projection screens. Fabric weight, roll diameter, drop height and tube deflection decide the maximum shade size, so run the sizing math before you commit to a width.
Does the 510S2 need a separate data cable?
Yes. Somfy ships the motor with a 9.8 ft SJTW power lead and sells the RS485 data cable as a separate part, in RJ9 or RJ45 form. Plan the data run alongside the power run during rough-in. Pulling a second cable after the ceiling closes costs far more than ordering the cable up front.
Which bracket matches the star head?
The LT50 star head motor bracket (9410651) locks the star profile and holds the motor against rotation under load. The LT50 universal motor bracket (9410665) suits shallow pockets and tight headboxes where the star bracket will not land. Confirm your pocket depth before you choose between the two.
Shade Motors Direct is an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.
