Somfy Simu DMI5Hz 35Nm Radio Motor Fit and Torque Guide

Installers sizing a 120V tubular motor for an awning start at the tube, not at the torque chart. The Simu DMI5Hz 2004674 carries a 1.77 in body, and Somfy publishes a minimum tube inside diameter of 1.85 in for it. A 2 in octagonal shutter tube takes it. A tube measuring under 1.85 in across the inside will not accept the motor at all, whatever the torque column says. Measure the tube first, then read the rest of this page.

Torque comes second. This reference turns 35 Nm at 18 rpm, which places it at the upper end of the Simu T5 range and suits a wide folding-arm awning or a tall aluminum rolling shutter. Somfy pairs that output with a built-in Hz radio receiver and a crank override, so one motor answers both the remote control question and the power-failure question.

Awnings and rolling shutters the 35 Nm DMI5Hz drives

Somfy publishes two applications for reference 2004674: awning and rolling shutter. The 35 Nm rating gives an installer headroom on a folding-arm awning with a full-width hood, and on an extruded aluminum shutter curtain running a tall opening. At 18 rpm the tube turns at a working pace across a 10 ft drop and still feels brisk on a short one.

Weight sets the ceiling, and a width measurement on its own tells you little. An installer works out the load at the tube surface, adds the drag of the guide rails or the arm springs, then steps up to the next torque rating above that number. A buyer running a narrow screen or a light shutter will find the 30 Nm and 25 Nm DMI5Hz references a closer match. Picking the larger motor costs more and takes the same bracket.

Verified specifications for Simu DMI5Hz 2004674

Figures above come from Somfy's published e-catalog entry for reference 2004674. Buy the motor here: Somfy Simu DMI5Hz 35Nm 18rpm 120V (2004674).

The crank override and the shaft it takes

DMI marks the manual override. A storm knocks the power out, the awning sits extended, and the homeowner still needs it in. A crank hooks into the override eyelet on the motor head and winds the tube by hand. The gearing holds position once the crank comes off, and the motor picks up its stored limits when power returns.

Somfy drives the override through a 7 mm hex shaft. Length depends on where the eyelet lands against the fascia or the hood, and installers order the shaft to suit the opening. The Somfy Simu extension shaft, 7 mm hex, 330 mm with screw (9420659) covers a standard hood depth. Confirm the hex size against the override eyelet on the motor you receive before you cut or order a shaft.

Brackets and drives that fit the CMO head

The CMO head on this motor takes the Somfy DMI bracket family. Two of them cover most jobs. A flat plate bolts to a header or a shutter box wall, and a 2-piece U drops the motor into an inside-mount channel where the plate has nowhere to sit.

• Somfy Simu DMI Motor Bracket Plate 100mm x 100mm (9706034) for a flat surface behind the motor head
• Somfy Simu DMI Bracket 2 Piece Inside Mount Adjustable U (2005701) for a shutter box or a cassette with side walls
• Somfy T5/T6 70mm Octagonal Aluminum Drive (9011878) for a 70 mm octagonal shutter tube
• LT50 crowns and drives for 60 mm octagonal and 2.5 in round tubes, matched to the tube profile you measured

Crown and drive sizing follows the tube, never the motor. Measure across the flats of an octagonal tube, or across the inside of a round one, and order the drive stamped for that figure. A drive one size down spins inside the tube and chews the aluminum. A drive one size up will not enter.

Radio control on 433.420 MHz

The Hz receiver sits inside the motor, so the installation needs no external receiver box and no low-voltage control wiring. Simu Hz transmitters work on 433.420 MHz, and Somfy rates the link at 492.15 ft in open field. Walls and metal shutter boxes cut that figure, and a single interior wall between a handheld and an awning motor leaves plenty of margin on a residential run.

Pairing follows the standard Simu Hz sequence from the installation guide that ships with the motor. An installer powers the motor, puts it into programming mode, then records the transmitter. Limits get set after pairing, through the motor's mechanical limit screws rather than through the remote.

Install notes for the 2004674

Mechanical limits give 28 turns of tube travel. That figure caps the drop: multiply the tube circumference by 28 and compare the result against the height of the shutter curtain or the awning projection. A 60 mm octagonal tube clears a 15 ft run inside that budget.

The 19.69 ft SJTW cable carries three wires and terminates in NEMA plug ends, which covers a run from a shutter box down to an outlet or a junction without a splice on most installations. Class I insulation means the ground conductor matters, so land it. IP 44 rates the motor against splashing water, and the tube and the hood carry the real weather protection outdoors.

Rated current reads 2.1 A at 250 W. Count that against the breaker when several motors share a circuit. Thermal cutout time runs 4 minutes of continuous operation, which no awning cycle approaches, though a long commissioning session that cycles the tube up and down will reach it. Let the motor rest and it resets itself.

The DMI5Hz 35 Nm against the rest of the Simu line

Somfy builds the DMI5 Hz line across several torque steps on the same T5 body, same CMO head, same 1.85 in tube minimum. The 25 Nm and 30 Nm references suit lighter shutters. This 35 Nm reference carries the heavier curtains and the wider awnings. Stepping up past 35 Nm moves a buyer into the DMI6 Hz line, which uses a larger body and a different bracket set.

Buyers replacing an existing Simu DMI5 Hz motor should match the torque stamped on the old motor rather than guess from the shade size. The bracket, the drive, the crown and the override shaft all carry over inside the line, which keeps a swap down to the motor itself.

FAQ

What tube does the Simu DMI5Hz 2004674 fit?

Somfy publishes a minimum tube inside diameter of 1.85 in for this motor. The body measures 1.77 in and the head 1.97 in. A 60 mm or 70 mm octagonal shutter tube takes it with the matching drive and crown, as does a 2.5 in round tube. Measure the inside of the tube before ordering.

How does the manual override work during a power outage?

A crank engages the override eyelet on the motor head through a 7 mm hex shaft and winds the tube by hand. The awning or shutter moves at crank speed and holds position when the crank comes off. Stored limits survive the outage, and the motor returns to normal radio operation once power comes back.

Does the 2004674 need a separate radio receiver?

No. The Hz receiver sits inside the motor head. An installer records a Simu Hz transmitter straight to the motor on 433.420 MHz, with no external receiver box and no control wiring beyond the 19.69 ft power cable.

What torque should I pick for a wide awning?

Calculate the load at the tube surface, add the resistance of the arms or guide rails, then take the next torque rating above that number. The 35 Nm 2004674 covers wide folding-arm awnings and tall aluminum shutters. Lighter assemblies run on the 25 Nm and 30 Nm references in the same line.

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