The crank override decides this motor
Somfy builds the Simu DMI5 for owners who want a hand crank on a powered shutter. The 40 Nm version carries reference 2000775, and Somfy names it DMI5 40Nm 12rpm 120V. Its override head takes 6 mm and 7 mm fittings through a 27:1 reduction, so one person can raise a loaded shutter when the power drops. An installer who does not need that path picks a plain wired LT50 instead. An owner who wants power and a manual backup picks the DMI5.
Torque sets everything after that. 40 Nm turns heavy aluminum rolling shutters and wide cassette awnings on ordinary 120V house power. Somfy pairs that torque with 12 rpm, a travel speed that suits a tall shutter curtain and keeps the running noise at 55 dB. Reference 2000775 sits near the top of the DMI5 line, one step under the 50 Nm model.
Shutters and awnings the DMI5 40 Nm turns
Somfy publishes two applications for this reference: awning and rolling shutter. Both live outside. Both pull the motor through a full travel cycle every day of the season, which is why Somfy rates the motor at IP 44 with Class I insulation and backs it for five years.
An extruded aluminum rolling shutter across a 10 foot opening lands inside 40 Nm with headroom left for a stiff guide rail. A folding arm awning with a heavy front bar and a full valance lands there too. Builders also reach for the DMI5 on security shutters where the slat pack weighs more than the fabric roll it replaced.
The override widens who can specify the motor. A shutter over a bedroom egress window needs a manual path, and plenty of local inspectors ask to see one. Somfy answers that with the override head and a hex shaft rather than a bolt-on gearbox, which keeps the tube end clean. Fabricators use the crank during commissioning too, turning the tube by hand to seat a drive wheel before they bring power to the motor.
Verified specs for reference 2000775
| Somfy reference | 2000775 |
| Somfy product name | DMI5 40Nm 12rpm 120V |
| Model designation | MOTOR DMI5 40NM/12RPM-120/60-C2,5M WHITE |
| Torque | 40 Nm (354 in-lb) |
| Speed | 12 rpm |
| Power supply | 120V / 60Hz AC |
| Rated current | 1.8 A |
| Power consumption | 210 W running, 0 W standby |
| Sound level | 55 dB |
| Protection | IP 44, Class I insulation |
| Motor head | CMO manual override head |
| Limit switches | Progressive mechanical end-limits, 28 turns |
| Manual override | Built-in, 6 mm and 7 mm fittings, 27:1 reduction |
| Cable | 8.2 ft (2.5 m), 4-conductor VVF, white |
| Operating temperature | -4°F to 158°F |
| Weight | 3.28 kg (7.2 lb) |
| Control | Wired |
| Applications | Awning, rolling shutter |
| Warranty | 5 years |
Two figures in that table drive the order. Torque tells you the motor clears the curtain weight. The 28-turn limit range tells you the motor clears the drop. Multiply your tube circumference by 28 and compare the answer to the finished shutter height plus the wrap on the tube. A 60 mm tube gives roughly 188 mm per turn, so 28 turns covers a drop past 17 feet.
Tube, crown and drive selection
The DMI5 shares its tube hardware with the Simu T5 and T6 range, and Somfy publishes a crown and drive for each tube profile. A 60 mm round tube takes the T5/T6 60mm round aluminum drive. A 70 mm octagonal tube takes the 70mm octagonal aluminum drive, which indexes on the flats and stops the tube from slipping under a 40 Nm load.
Measure the inside of the tube, not the outside. Wall thickness on extruded shutter tube runs anywhere from 0.6 mm to 1.5 mm, and that difference moves the inside diameter enough to change the part you need. Check the seam as well. A rolled octagonal tube with a pronounced seam needs the octagonal drive to seat flush, and a round tube with a keyway needs the round drive that matches it.
Somfy also lists LT50-profile crowns and drives for this motor, covering 2 inch and 2.5 inch round tube, 78 mm, and 60 mm and 70 mm octagonal. Pick the crown and the drive as a pair from the same profile. A drive from one profile and a crown from another will bind the tube and load the motor bearing.
Brackets, the crank side and limit setup
The override head needs its own bracket, and Somfy builds the DMI family plate for it. The DMI 1-piece round adjustable cast plate carries the head in a shutter box with a flat back wall, and its adjustment lets you square the tube after the box goes up. A tight pocket calls for the 2-piece inside mount adjustable U bracket, which clamps to the box sides instead of the back.
The crank side needs a shaft that reaches the wall. Somfy supplies the 7 mm hex extension shaft, 330 mm long, with its screw. Measure from the override socket on the motor head to the point where the eyelet or gearbox lands on the inside face of the jamb, then order the shaft that covers it. Cutting a long shaft down beats stacking two short ones.
Limit setting on this motor stays mechanical. Two adjusters on the head move the progressive end stops, and you turn them with the setting tool while the motor runs on a switch. Set the down limit first with the curtain against the sill, then the up limit with the slat pack clear of the head. Power the motor through its own 4-conductor VVF cable to a wired switch, and give each motor its own switch. Somfy builds the wiring around one switch per motor, and ganging two motors on one switch back-feeds the opposite winding.
Order the DMI5 40 Nm with the parts around it
Buy the Somfy Simu DMI5 40Nm 12rpm 120V (2000775) with the tube hardware in the same order, because the motor ships without a crown or drive. Most jobs leave with four parts: the motor, a crown and drive pair for the tube profile, the DMI cast bracket plate, and the 7 mm hex extension shaft for the crank.
Owners replacing a failed motor should read the label on the old unit first and match the torque, since a 40 Nm shutter will not run on a 20 Nm motor for long. Our motor label guide walks through the numbers on that sticker.
Frequently asked questions
What tube size fits the Somfy DMI5 40 Nm motor?
Somfy publishes crowns and drives for the DMI5 in 60 mm round, 70 mm octagonal, 78 mm, and 2 inch and 2.5 inch LT50 round profiles. Measure the inside diameter of your tube and match the crown and drive as a pair from one profile. The motor body itself drops into the tube behind the crown.
How far will the DMI5 40Nm travel on its limits?
Progressive mechanical end-limits on the head hold 28 turns of tube rotation. On a 60 mm tube that covers a drop past 17 feet, and on a larger tube it covers more. Count the turns your shutter needs from fully closed to fully open, then add the wrap already on the tube before you order.
Which bracket does the override head need?
The CMO head mounts on a Somfy DMI plate. The 1-piece round adjustable cast plate 9420647 suits a box with a flat back wall, the 100 mm square plate suits a prepared mounting surface, and the 2-piece inside mount U bracket clamps to the side walls of a shallow box. Pick by the box, not the motor.
Can one wired switch run two DMI5 motors?
Give each DMI5 its own switch. Somfy wires the motor with a 4-conductor VVF cable where the switch feeds either the up winding or the down winding, and tying two motors to one switch sends current back through the opposite winding. Installers who want group control use a relay panel or a dedicated group controller ahead of the switches.
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