Installers working from a 24V DC rail need a motor built for that supply. Somfy's Simu T5 at 15 Nm, reference 2004495, runs on 18 to 30 volts DC inside a 50 mm tubular body. Mechanical limit switches and a four-wire cable keep the control side plain. Battery banks and low-voltage transformers both feed it.
Pick the 24V DC T5 when line voltage sits out of reach
Two questions settle this spec. Does the opening carry 120V power at the pocket, and will the tube clear a 50 mm motor body. A no on the first question moves the choice into Somfy's DC range. Somfy builds the T5 in 120V AC, 12V DC and 24V DC. All of them share the 50 mm body, the round head with pins and the same accessory list, so an installer who switches from the AC version to this one keeps every bracket and drive already on the van.
The 24V rail wins on two counts. Longer cable runs lose less of the supply than a 12V run of the same gauge, and the 2.3 A draw at 62 W stays inside the budget of a modest transformer. Off-grid patio covers and solar-fed exterior screens both land here.
Shade types this 15 Nm motor drives
Somfy lists reference 2004495 for awnings, exterior solar screens, interior window coverings and rolling shutters. The 15 Nm rating puts it in the mid range of the T5 DC line, above the 10 Nm class and below the 20 Nm and 35 Nm models.
Torque sets the width and weight you can hang. A 15 Nm motor on a 60 mm octagonal tube handles a mid-size exterior screen or a projection awning on a residential patio. Heavier fabric, a wider span or a solid rolling shutter slat pushes the job onto the 20 Nm or 35 Nm reference in the same family. Somfy publishes the torque figure, and the fabricator's own load chart converts it into a width and drop. Run that math before you order.
Speed matters on tall drops. At 17 rpm this motor moves a 60 mm tube at a measured pace, which suits exterior screens where fabric needs to track into side channels without snatching.
Verified Somfy specs for reference 2004495
| Torque | 15 Nm |
| Speed | 17 rpm |
| Power supply | 24V DC, 18 V to 30 V input range |
| Rated current | 2.3 A |
| Power in operation | 62 W |
| Limit switches | Mechanical, 28 turns |
| Head type | Round with pins |
| Cable | 8.2 ft VVF, four-wire, white |
| Motor body diameter | 1.77 in |
| Head diameter | 1.97 in |
| Protection | IP 44, Class III insulation |
| Operating temperature | -4 °F to 140 °F |
| Storage temperature | -4 °F to 176 °F |
| Applications | Awnings, exterior solar screens, interior shades, rolling shutters |
| Warranty | 5 years |
| Somfy reference code | T5 15/17 24V DC C2,5M WH CEM/1 |
Figures come from Somfy's own e-catalogue entry for 2004495 and from the Simu T5 DC installation guide.
Tube, crown and drive fit
The motor body measures 1.77 in across and the head 1.97 in. The tube has to clear the body along its whole length, and the crown and drive set does the rest of the work. Somfy pairs this motor with the LT50 crown and drive range, which covers 2 in round tube up to DS 85 mm.
Two drives carry most T5 work on this side of the catalogue. The T5/T6 60mm Round Aluminum Drive (9012950) fits 60 mm round tube, and the T5/T6 70mm Octagonal Aluminum Drive (9011878) handles 70 mm octagonal, the profile most awning fabricators cut. Both seat on the T5 drive spline, so no adapter sits between the motor and the drive.
Match the crown to the drive and the tube. A 60 mm octagonal tube takes the LT50 octagonal 60 mm crown with the matching 60 mm drive wheel. Mixing a 2 in crown with a 60 mm drive leaves the tube loose on the idle end, and the shade walks out of square within a season.
Add a Drive Stop and Screw (9910004) on any drive that needs the tube locked against the wheel. Awnings under wind load benefit most from it.
Brackets and the mounting side
The round head with pins drops into a Somfy T5 operator bracket. The Simu T5 Operator Bracket 80mm x 80mm Square (9520049) is the standard square plate, and Somfy also lists a 100 x 100 mm plate, a 48 mm plate and pin mounts for the same head. Pick the plate that matches the hole pattern already drilled in the awning arm casting or the headbox end plate.
The pins carry the motor's reaction torque into the bracket. Seat them fully and check that the motor sits square to the tube axis before you load the fabric. A head cocked a few degrees puts a bending load on the drive spline every cycle.
Wiring and limit setup
Four wires leave the motor on an 8.2 ft white VVF lead. The supply side needs a 24V DC source inside the 18 to 30 volt window, sized to cover the 2.3 A draw with headroom for inrush. A transformer that only meets 2.3 A will sag at start and shorten the motor's life on a long run.
Class III insulation puts the motor in the low-voltage safety class, and IP 44 covers splash exposure, which fits an awning headbox or a screen pocket under a soffit. Direct weather needs a sealed enclosure for the supply and the switch.
Mechanical limits give you 28 turns of travel. Set them with the adjustment screws on the head before the fabric goes on, then fine-tune with the tube loaded. Somfy's installation guide for the T5 DC family walks the sequence, and the limit heads turn with the same tool across the T5 range. Confirm the connector style against the motor you receive, since lead terminations vary by production batch.
Buy the Somfy Simu T5 15 Nm 24V DC motor (2004495) with the bracket and the crown and drive set that match your tube, and the job needs one trip. Somfy backs the motor for five years.
Simu T5 24V DC questions
What voltage does the Simu T5 2004495 need?
Somfy publishes a 24V DC nominal supply with an 18 V to 30 V input range. The motor draws 2.3 A and 62 W during operation. Size the transformer or battery supply above that figure so voltage holds under inrush, and keep the DC run short enough that cable loss stays inside the 18 V floor.
Which tube sizes fit this motor?
The body measures 1.77 in across, so the tube's inside diameter has to clear it along the full insertion length. Somfy pairs the motor with the LT50 crown and drive range, covering 2 in round tube through DS 85 mm, plus 60 mm round and 70 mm octagonal aluminum drives built for the T5 spline.
Does this motor work with an RTS remote?
No radio receiver sits inside reference 2004495. The motor takes its commands from the four-wire lead and a wired switch or a DC control board. Adding radio control means a separate receiver on the supply side, matched to a 24V DC load rather than a line-voltage one.
How many turns of travel do the limits allow?
Somfy publishes 28 turns on the mechanical limit switches. That figure covers the drop most awnings and exterior screens need on a 60 mm or 70 mm tube. Set the limits before the fabric loads the tube, then confirm both ends with the shade hung and the full weight on the drive.
Shade Motors Direct is an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.
