Somfy Simu DMI5 15 Nm Crank Override Motor Fit Guide

A rolling shutter on a storm coast has to come down when the power does not. That requirement picks the motor before torque enters the conversation. The Somfy Simu DMI5 15 Nm 18 rpm 120V motor (2000769) carries a crank override inside the motor head, so an owner keeps the curtain moving with a hex rod and a crank handle. Somfy gears that override at 27:1, which holds crank effort down on a full-height shutter.

Pick the DMI5 when the shutter has to move by hand

Somfy splits its 50 mm wired range into two camps. Standard operators run on switch power alone. The DMI5 adds a second drive path through the gearbox, reached from the crank end of the motor, and that path works with the circuit dead. Installers choose it for hurricane shutters, egress windows, security screens on ground-floor retail, and exterior awnings over a patio the owner wants closed before a storm front lands.

The override accepts 6 mm and 7 mm fittings, which covers the common Simu eye and rod hardware. A short rod suits a shutter box at head height. For a high transom or a deep soffit, reach for the Somfy Simu 7 mm hex extension shaft, 330 mm long (9420659), which carries the crank down to a working height and arrives with its screw. Confirm the eye size against the override socket on the motor you receive before you cut a rod to length.

Shutters and awnings the 15 Nm head drives

15 Nm sits at the entry of the DMI5 torque ladder, and 18 rpm makes it the quick one. Torque demand climbs with curtain weight and with the radius the fabric or slat pack winds onto, so a 60 mm tube pulls more from the motor than a 50 mm tube carrying the same curtain. A 15 Nm head suits aluminium roller shutters on residential window openings, light security screens, and compact cassette awnings.

Speed matters on a shutter the owner cycles twice a day. At 18 rpm the DMI5 clears a 28-turn travel in roughly a minute and a half of continuous run. Step up the torque rating when slat weight grows: Somfy publishes the DMI5 at 15, 20, 25, 30, 35, 40 and 50 Nm, and the 12 rpm variants trade travel speed for pulling power on heavy shutter curtains.

Verified specifications

Somfy publishes the torque, speed, supply, operating wattage, standby draw and IP rating above. Those six figures decide the breaker, the wire gauge and the shutter the motor can carry.

Tube, crown, drive and bracket fit on the 50 mm body

The DMI5 body measures 50 mm, so the tube has to clear that diameter with room for the crown to seat. Somfy covers the common profiles with two families of adaptors. T5 and T6 aluminium drives handle round and octagonal tube: the Somfy T5/T6 60 mm round aluminium drive (9012950) keys the motor to 60 mm round tube, and the 70 mm octagonal drive (9011878) and 85 mm Simbac wheel (9420300) step the body into larger shutter tube.

LT50 crowns and drives also seat on this motor. A 60 mm octagonal shutter tube takes the Somfy LT50 octagonal 60 mm crown (9707025) at the head end with the matching 60 mm drive wheel (9751001) on the gearbox nose. Imperial roller tube runs on the LT50 2 inch and 2.5 inch clip drives, and the DS78 set covers 78 mm. Match the crown and the drive to the same tube profile, then pin the drive with a drive stop and screw (9910004) so the tube cannot creep off the key under load.

Somfy builds three DMI mounting plates for this head. The 1-piece round adjustable cast plate (9420647) drops into a standard shutter box with a round motor pocket and lets an installer rotate the head to square the drive. The 100 mm x 100 mm plate (9706034) bolts to a flat face inside a box or behind a fascia. The 2-piece inside mount adjustable U (2005701) handles a tight box where the plate goes in after the motor.

Plan the crank end before you set the bracket. The idler side carries the override eye, and the rod needs a clean swing path clear of the fascia and the window reveal. An LT50 universal 10 mm idler end cap with collapsible shaft (9420800) takes the dead end of the tube on installs where the tube goes in last. Leave access to the motor head as well, because both limits adjust there.

Wiring and limit setup an installer asks about

The DMI5 runs on 120 V / 60 Hz and pulls 1.3 A at 15 Nm, so a standard 15 A residential circuit carries several motors on one run. Wire it to a Somfy wired switch or a rocker, one motor per switch, and keep the two travel conductors separate right back to the switch. Two motors tied to the same pair of travel wires will fight each other.

Limits are mechanical and progressive, set on the motor head with the supplied key. Run the curtain to the closed position, set the down limit, then run up and set the top. 28 turns of capacity covers tall shutter curtains on 60 mm tube. Somfy rates the motor IP 44, which suits a shutter box and a covered awning hood. Mount it behind a hood or inside the box rather than exposed on an open wall.

Control stays wired on this reference. Add a Somfy radio motor from the T5Hz or DMI5Hz range when a job calls for a handheld remote, or feed the DMI5 through a Somfy wired control panel for group operation from a wall station.

Order the 2000769 and the parts around it

The Simu DMI5 15 Nm 18 rpm 120V motor (2000769) ships as a bare motor. Build the order around the tube you have: a crown and drive pair for the profile, one DMI bracket plate for the box, and an extension shaft if the crank sits out of reach. The 1-piece round adjustable cast plate (9420647) covers most shutter boxes, and the 60 mm round drive or the LT50 60 mm crown covers most tube. Keep 28 mm and 40 mm hardware away from this motor, because those parts belong to the small-tube Sonesse and LS40 ranges and will not seat on a 50 mm body.

Frequently asked questions

What does the DMI5 manual override need on the crank side?

The override takes a 6 mm or 7 mm fitting at the motor head, driven through a 27:1 reduction. Somfy supplies the drive path, and the installer supplies the eye, the rod and the crank handle. The 7 mm hex extension shaft 9420659 runs 330 mm and arrives with its screw, which covers a head-height shutter box.

How much torque does a residential rolling shutter need?

Torque demand tracks curtain weight and winding radius together. 15 Nm carries aluminium slat shutters on standard residential window openings and compact cassette awnings. Weigh the curtain and measure the tube before ordering. The DMI5 range climbs to 50 Nm, so a heavier slat pack or a wider opening moves you up the ladder.

Which tube sizes fit the Simu DMI5 2000769?

The 50 mm body seats in 60 mm round tube with the T5/T6 60 mm drive 9012950, in 60 mm octagonal with the LT50 crown 9707025, and in 70 mm octagonal with drive 9011878. Imperial 2 inch and 2.5 inch roller tube runs on the LT50 clip drives, and 85 mm Simbac tube takes wheel 9420300.

Can the DMI5 take a Somfy remote?

This reference runs on wired switch control. Somfy builds radio into the DMI5Hz and T5Hz lines for jobs that call for a handheld transmitter, and both share the same brackets and crown hardware as the wired DMI5. A Somfy wired control panel also groups several DMI5 motors behind one wall station.

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