Somfy Simu DMI5Hz 30Nm Radio Motor Fit and Torque Guide

Tube size and override access settle this order

Installers lose a day when a 50 mm motor arrives for a 1.75 in tube. The Simu DMI5Hz 2004673 needs 1.85 in of clear inside diameter before anything else matters. Measure the tube first. The crank override wants a path out the end of the headbox too, so check the end plate for a shaft hole or plan to cut one.

Somfy builds this motor for openings where a dead circuit cannot leave a shutter down or an awning out over a patio. The DMI head accepts a 7 mm hex shaft, and a crank on that shaft moves the fabric by hand at the speed you turn it. Power returns, the radio takes over again, and the motor keeps the limits it already learned.

Awnings and rolling shutters this 30 Nm motor drives

Somfy publishes awning and rolling shutter as the two applications for reference 2004673. Thirty newton meters at 12 rpm covers a mid-size retractable awning on a 60 or 70 mm tube, a residential rolling shutter in aluminum or PVC, and an exterior screen that a 20 Nm motor would labor against. The 12 rpm speed keeps a heavy awning arm from slamming at the open limit.

Weight sets the ceiling, and so does drop. A longer drop winds more fabric onto the tube, which grows the roll diameter and raises the torque the motor sees at the top of travel. Shade fabricators work from the tube and roll build-up rather than square footage. Call the fabric supplier for the finished roll diameter if the shade runs past 10 feet of drop.

The 25 Nm and 35 Nm DMI5Hz motors sit either side of this one on the same body, so a job that measures out between sizes has a Somfy answer in both directions.

Verified specs

Figures confirmed against Somfy's published page for reference 2004673 at somfysystems.com.

Crowns, drives and brackets that fit the T5 body

The 2004673 sits in Somfy's T5 50 mm motor class, so the whole T5 and LT50 crown and drive range bolts onto it. Match the drive to the tube profile you have in hand. A 60 mm round tube takes the T5/T6 60mm Round Aluminum Drive (9012950), and a 70 mm octagonal shutter tube takes the T5/T6 70mm Octagonal Aluminum Drive (9011878). Both parts carry the load from the motor crown into the tube wall, so a loose fit shows up as a knock at every start.

Mounting runs through Somfy's DMI bracket range, which locates the CMO head and leaves the override shaft clear. The DMI Bracket 1-Piece Round Adjustable Cast Plate (9420647) handles a flat face or a fascia with a single cast plate. For a headbox where you want to set the motor from inside, the DMI Bracket 2 Piece Inside Mount Adjustable U (2005701) splits into a fixed U and an adjustable carrier.

Keep 28 mm tube parts away from this motor. A 50 mm body will not seat in small tube hardware, and a forced fit cracks the crown.

Hz radio control and pairing

The receiver lives inside the motor on 433.420 MHz, Somfy's Hz band for the Simu range. Nothing hangs outside the tube, and no separate receiver box needs a spot in the headbox. Somfy rates the link at 492.15 ft in open field, which covers a long patio run or a second story shutter from a handheld downstairs. Walls, stucco mesh and foil-backed insulation all cut that figure, so test from the spot the owner will stand in before you close the box.

Order a Simu Hz transmitter with the motor. The Hz band and the Somfy RTS band are separate systems, and an RTS remote will not drive a Simu Hz receiver. Ask our team for the current Hz transmitter options if you need a wall sender, a handheld, or a sun and wind sensor for an awning.

Standby draw sits at 0 W. A bank of these motors costs nothing on the meter between runs, which matters on a commercial shutter install with 20 openings on one panel.

Override shaft, limits and install notes

The CMO head takes a 7 mm hex shaft. Our Simu Extension Shaft 7mm Hex 330mm with Screw (9420659) reaches from the head to a wall or fascia where a crank eye can live, and the screw locks it against the head so it cannot back out under load. Measure from the head face to the outside of the headbox and add the eye depth before you pick a shaft length.

Limits are mechanical with a 28 turn capacity. You set them with the adjustment screws on the head using the motor's own travel, and they hold through a power loss because nothing stores them in memory. Set the bottom limit with the fabric under tension and the top limit with the awning arms short of hard stop.

Run the motor on its own 120 V circuit with a proper ground. The motor carries Class I insulation, which means the ground wire is part of the safety design rather than optional. IP 44 covers splash and driven rain on an exterior headbox, and it does not cover a submerged or hosed-down installation. Somfy's 5 year warranty follows the motor when a licensed installer wires it to code.

Order this motor with the right parts

Buy the Somfy Simu DMI5Hz 30Nm 12rpm 120V (2004673) once you have the tube inside diameter, the tube profile and the override path settled. Add the drive that matches your tube, the DMI bracket that matches your mount, and the extension shaft that reaches your crank eye. A Simu Hz transmitter finishes the order.

Our team checks fitment against Somfy's own data before anything ships. Send the tube measurement and a photo of the end plate and we will confirm the parts list.

Does the DMI5Hz 2004673 work without power?

Yes, by hand. The DMI head accepts a 7 mm hex shaft, and a crank on that shaft raises or lowers the shade during an outage. The radio and the motor need 120 V to run under power, and the mechanical limits survive the outage, so the shade returns to its set travel once the circuit comes back.

Which tube does this motor need?

A tube with at least 1.85 in of clear inside diameter. The motor body measures 1.77 in and the head measures 1.97 in. Pair it with a T5 or LT50 crown and drive that matches your tube profile, round or octagonal, and seat the drive against the tube wall with no play.

Will a Somfy RTS remote control it?

No. This motor carries a Simu Hz receiver on 433.420 MHz, and Somfy keeps Hz and RTS as separate radio systems. Order a Simu Hz transmitter to pair with it. Our team can confirm the current Hz sender and sensor options for an awning or a shutter bank.

What torque does a 10 foot awning need?

Torque follows the finished roll diameter and fabric weight rather than width alone. Thirty newton meters at 12 rpm suits a mid-size retractable awning, and the 25 Nm and 35 Nm DMI5Hz motors sit either side of it. Send the drop and the tube size and we will size it against Somfy's data.

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