Installers reach for the Somfy Sonesse Ultra 506A2 RTS 120V Motor (1002562) when a room cannot tolerate motor noise. Somfy rates this motor at 38 dBA. It turns 6 Nm at 24 rpm on 120V AC, 60Hz, and it carries a built-in RTS receiver, so the shade answers a handheld remote the day it goes up.
Rooms that call for a 38 dBA shade motor
This motor drives interior roller shades, solar screens, blackout roller blinds, and front-projection screens. Somfy lists the protection index at IP 31, which keeps the 506A2 indoors and out of soffits or open patios. Bedrooms, hotel guest rooms, boardrooms, and home theaters are the spaces where 38 dBA changes the specification, because the shade moves while people are talking, sleeping, or recording.
Torque decides the rest. 6 Nm covers interior roller shades on a 2 inch or 2.5 inch tube across residential widths and light commercial openings. Heavy blackout fabric, a wide opening, or a fascia that adds drag moves the job further up the Sonesse 50 range. Somfy builds that whole range on the same LT50 mounting pattern, so a change in the torque call leaves the bracket and crown list mostly intact. The Somfy Sonesse Ultra 506A2 RTS 120V Motor (1002562) is the quiet end of that family.
Somfy also supports multi-banding of up to six shades on one motor pairing, which matters on a wide window wall where several tubes should land together.
Tube sizes the 506A2 fits
Somfy publishes a minimum tube inside diameter above 47 mm for the Sonesse Ultra 50 RTS. Measure the inside of the tube, not the outside. A 2 inch profiled aluminum tube clears that figure, and so does Somfy 2.5 inch OD aluminum tube (1781343), which ships by the foot in 16 foot lengths for wider openings.
Somfy's own instruction sheet is direct about the adaptor. A motor crown adaptor between the motor and the end product tube is required for concentric operation. Leave it out and the tube orbits the motor instead of spinning around it, which shows up as a wobbling hembar and a noise floor well above 38 dBA. The crown carries the tube. The drive transfers the torque.
The 506A2 uses a star head. Its two mounting holes take 5 mm self-tapping screws on 1.89 inch centers, which is the pattern LT50 star head brackets are cut for.
Verified specs for the 506A2 RTS
| Torque | 6 Nm (53 in-lb) |
| Speed | 24 rpm |
| Sound level | 38 dBA |
| Power supply | 120V AC, 60Hz, 0.95 A |
| Power draw | 114 W running, 0.5 W standby |
| Radio frequency | 433.420 MHz (RTS) |
| Motor head | Star head |
| Minimum tube inside diameter | Above 47 mm (1.85 in) |
| Limit switch | Electronic RTS, 250 turn capacity |
| Protection index | IP 31, interior |
| Operating temperature | 32 F to 140 F (0 C to 60 C) |
| Warranty | 5 years |
Specs above come from Somfy's Sonesse Ultra 50 RTS spec sheet (D-0021) and Somfy's own product record for 1002562.
Crown, drive, and bracket parts that finish the assembly
A Sonesse Ultra 506A2 arrives as a bare motor. Two parts do the work inside the tube, and a bracket carries the head, and each of them is sized to the tube rather than to the motor.
The Somfy LT50 2.5 inch Crown (9707026) centers the motor body inside a 2.5 inch tube. The Somfy LT50 2.5 inch Soft Clip Drive (9206041) engages the drive shaft and passes torque into the tube wall, and the soft clip version cushions the handoff, which trims start and stop noise on a motor already chosen for silence. Order the crown and the drive as a matched pair for the same tube size. Mixing a 2 inch drive with a 2.5 inch crown leaves slop that no amount of limit tuning fixes.
At the head end, the Somfy Motor Bracket with Spring Ring, 120mm x 120mm (9763503) gives a square plate for pocket and ceiling mounting where a slim clip bracket has nothing to grab. Somfy also calls for the 500 Series drive stop and screw (9910004) tightened between 1.5 Nm and 1.8 Nm. That torque window keeps the drive from separating and holds the noise down, and it is one of the few numbers on a shade assembly worth checking with a torque driver.
RTS control and TaHoma integration
The receiver is built into the motor head, so an RTS transmitter talks to it at 433.420 MHz with no external receiver in the pocket. A single-shade room pairs to the Somfy Situo 1 Channel RTS Pure Remote (1870571) in under a minute, and that remote doubles as the programming tool for limits and direction.
Adding TaHoma puts the same motor on a phone, a schedule, and voice control, and it opens the 506A2 to sun and wind sensors and to third-party automation. Somfy's timer and sensor line runs on the same RTS protocol, so a room that starts with one handheld remote grows into scheduled operation without rewiring the pocket.
Wiring and limit setting
The 506A2 ships with a 3-conductor SJTW power cable at 9.8 feet. White is neutral, black is hot, green is ground. Somfy offers NEMA plug cable options from 3 feet to 24 feet, which covers the gap between a pocket outlet and a junction box on a long run.
Limits are electronic and hold up to 250 turns of travel, set from the remote rather than with a screwdriver in the head. Set direction first, then the upper and lower stops. On a projection screen, set the lower limit against a drop chart instead of by eye, since a screen that stops an inch low throws off the image geometry more than a shade hem ever would.
Frequently asked questions
What tube does the Sonesse Ultra 506A2 fit?
Somfy publishes a minimum tube inside diameter above 47 mm. A 2 inch profiled aluminum tube and a 2.5 inch OD aluminum tube both clear it. The tube alone does not complete the fit, since a crown and drive set matched to that same tube size holds the motor concentric inside it.
How quiet is the 506A2 compared with a standard Sonesse 50 motor?
Somfy rates the Sonesse Ultra 50 RTS range at 38 dBA, the quietest interior motor Somfy publishes for roller blinds. That figure holds while the motor delivers 6 Nm at 24 rpm. Pairing it with a soft clip drive and a drive stop torqued to spec keeps the installed result close to the rated number.
Does 1002562 work with TaHoma and voice control?
Yes. The 506A2 uses Somfy RTS at 433.420 MHz, and TaHoma bridges that motor to app control, schedules, sensors, and voice assistants. The same motor still answers a Situo or Telis handheld remote, so a TaHoma hub adds capability on top of local control rather than replacing it.
Which bracket suits a 506A2 in a ceiling pocket?
The star head takes 5 mm self-tapping screws on 1.89 inch centers. A square plate bracket such as the 120mm x 120mm spring ring bracket gives a broad fixing surface for pocket and ceiling work, where a narrow clip bracket has little structure to fasten into.
Shade Motors Direct is an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.
