Somfy Simu T3.5 6Nm 12V DC Motor Fit and Wiring Guide

A 12V DC supply changes the parts list for a shade motor. The Simu T3.5 6Nm 18rpm 12V, Somfy reference 2006975, runs on two conductors at low voltage and keeps the whole drive on the DC side of the job. Somfy rates it at 6 Nm and 18 rpm. Installers reach for it on interior roller shades and exterior solar screens fed by a transformer or a sealed battery.

Tube diameter decides the rest of the order. This is a 40 mm class motor with a round head, and Somfy names an adaptor for every tube profile it serves. Pick the crown and drive first. Wiring takes minutes after that.

Shades this 6 Nm motor drives

Six newton metres lifts a mid-size interior roller shade or an exterior solar screen on 40 mm tube. Somfy lists two applications against the reference: exterior solar screens and interior window coverings. The T3.5 line steps from 3 Nm up to 10 Nm, and 6 Nm sits on the middle rung, which covers most residential screen widths without pushing the gearbox.

Low voltage drives the choice as often as torque does. A 12V DC motor pairs with a regulated supply, and polarity on the two-wire cable sets direction. Installers running shades off a DC bus or a sealed battery keep every opening on the same 12V rail and skip line-voltage rough-in at the window.

Verified Simu T3.5 specifications

Somfy publishes both the 26 W running figure and a 0 W standby draw against this reference. Zero standby earns its keep on battery and solar work. The motor pulls nothing between runs, and a battery sized for the duty cycle alone will hold its charge through a quiet week.

Tube fit, crowns and drives

Somfy builds the T3.5 for 40 mm class tube and names a part for each profile. The Somfy T3.5 38mm Round adaptor for 40x1 tube (9001495) seats the motor in 40 x 1 mm round tube. Somfy lists 9001481 with crown 9147327 for 40 mm octagonal tube, the 9147330 crown with drive 9147544 for 40 x 1.5 mm round, and the LS40 to LT50 Crown and Drive Adapter kit (9013763) to carry the 400 series head into 500 series tube hardware.

Use 40 mm class crowns and drives on this motor. Parts cut for larger tube will not seat on the T3.5 head.

The Somfy Motor Plate (9012258), Somfy's R8 adaptor plate, carries the head on the bracket side. Somfy also lists the T3.5 flat mount bracket 9580009 and the 10 mm square pin mount bracket 9580008 against this reference. Match the bracket to your headbox depth and the plate follows from it. At the idler end Somfy names the 9510000 operator support for a 10 mm pin mount along with nylon and steel bearings sized to that pin.

Wiring and power supply sizing

Two conductors leave the motor in a white VVF cable, 8.2 ft long, with stripped ends. Polarity sets direction. Swap the two wires at the controller and the shade reverses.

Rated current is 2.2 A. Size the supply above that figure for each motor on the circuit and leave headroom for the inrush when several shades start together. Class III insulation and the IP 44 rating suit a protected exterior screen pocket. Keep the motor and its terminations out of standing water.

A regulated 12V DC supply gives the motor a steady rail and keeps speed consistent across a long run of shades. Confirm the connector on the motor you receive against the supply you plan to feed it from before you cut the lead.

Setting the mechanical limits

This motor carries mechanical limit switches with 40 turns of travel. Two adjustment screws on the head set the upper and lower stops. Run the shade down, set the bottom stop, then run it up and set the top. Travel beyond 40 turns sits outside the gearbox range, so measure your drop against tube circumference before you order.

Mechanical limits hold their setting without power. A battery swap or a dead supply leaves your stops where you left them, and the shade comes back to the same hem line.

Order the motor and the parts around it

The Somfy Simu T3.5 6Nm 18rpm 12V DC Motor (2006975) ships with its 8.2 ft lead and a 5 year Somfy warranty. Add the tube adaptor your profile calls for and the motor plate in the same order, so the install does not stall at the bracket on a Saturday.

Shops running a 24V rail should price the 24V T3.5 at the same 6 Nm and 18 rpm rating, Somfy reference 2006976. Everything above about tube fit, bracketing and limit setting carries straight across to it.

Questions installers ask

Will the Simu T3.5 6 Nm 12V run on a 24V supply?

No. Somfy publishes this reference as a 12V DC motor, and 24V sits outside its rating. Somfy builds a 24V version at the same 6 Nm and 18 rpm output under reference 2006976, and that is the motor for a 24V rail. Match the motor to the supply you already have at the window.

What tube does the Simu T3.5 6 Nm fit?

Somfy builds the T3.5 for 40 mm class tube with a round head. Adaptor 9001495 covers 40 x 1 mm round tube, part 9001481 with crown 9147327 covers 40 mm octagonal, and crown 9147330 with drive 9147544 covers 40 x 1.5 mm round. Kit 9013763 carries the motor into 500 series tube hardware.

How loud is this motor in a room?

Somfy publishes 70 dB for reference 2006975. That figure reads as a working tubular motor measured bare, and fabric, a headbox and a fascia all pull it down in practice. Mounting the head on its adaptor plate rather than metal to metal against the bracket helps in rooms where sound carries.

Does this motor take a Somfy radio remote?

This is a wired motor with two DC conductors and no onboard receiver. Control comes from a switch or a DC controller on the supply side. Somfy covers radio on the same platform with the T3.5 ESP Hz line, which carries a built-in 433.42 MHz receiver, so a remote-controlled job starts from those references.

Shade Motors Direct is an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.