Somfy Simu T5 10Nm 35rpm Wired Motor Fit and Torque Guide

Two Simu T5 operators carry 10 Nm of torque. One of them turns at 12 rpm. The other, ref 2000645, turns at 35 rpm and covers the same travel in under a third of the time. Speed decides between them, and the rest of the install, tube, crown, drive and bracket, stays identical.

The 35 rpm T5 and the shutters it suits

Somfy builds the T5 as a 1.97 in diameter tubular operator for rolling shutters, folding arm awnings and exterior solar screens. The 2000645 pairs a modest 10 Nm output with a fast 35 rpm shaft, so it fits light curtains on short drops. A single-window aluminum rolling shutter, a small cassette awning over a patio door, an exterior screen on a sunroom, all sit inside that envelope.

Torque sets the weight limit. Speed sets the patience limit. A homeowner who presses a wall switch and waits forty seconds for a 60 in shutter notices the wait every day, and the 35 rpm shaft removes it. Installers choose the 12 rpm sibling for heavier curtains where torque matters more than pace, and they choose 2000645 when the curtain is light and the drop is short.

Mechanical limit switches inside the head hold up to 28 turns of tube rotation. At a 2.5 in tube, 28 turns covers a long drop, more than most residential shutters need. The limits sit on adjusting screws, so an installer sets them with a screwdriver at the head, with no remote, no app and no pairing step.

Verified specs for the Simu T5 2000645

Somfy prints the internal reference code as T5 10/35 120/60 C2,5M WHITE. The C2,5M segment names the 2.5 m cable, which the US sheet gives as 8.2 ft. Match that code against the label on a motor you are replacing and you confirm the swap before you order.

Tube, crown and drive fit

The T5 head does not grip a tube. A crown slips over the motor head and keys to the tube wall, a drive wheel clips onto the output shaft, and the pair transmits the 10 Nm into the curtain. Somfy sizes both parts to the tube, so the tube profile dictates the kit.

Somfy lists the T5/T6 60mm Round Aluminum Drive (9012950) for 60 mm round aluminum tube, the most common residential shutter profile in North America. For octagonal steel tube, the T5/T6 70mm Octagonal Aluminum Drive (9011878) covers the 70 mm size that shutter fabricators use on wider openings. Somfy's accessory list for 2000645 runs to more than fifty parts, covering 50 mm and 60 mm octagonal, 67 mm round, 70 mm Simbac, 71 mm Perma, 78 mm DS and 85 mm round.

A Drive Stop and Screw (9910004) locks the drive wheel to the shaft. Skip it and the tube creeps against the drive over a few hundred cycles, and the limits drift out of position. Fit the stop at first assembly.

Bracket and head mounting

Somfy calls the 2000645 head round with pins. Two pins project from the head face and drop into a matching plate on the bracket, which carries the motor torque into the shutter box or the structure. The Simu T5 Operator Bracket 80mm x 80mm Square (9520049) is the bracket Somfy lists for a square 80 mm shutter box, and it accepts that pin pattern direct.

Narrower boxes take a different plate. Somfy publishes a 30 mm counter-sunk bracket, a 48 mm x 6 mm plate, a 100 mm square version and a 10 mm square pin mount for the T5 head, so measure the box side before ordering the bracket. At the idle end, a collapsible end cap carries the tube on a 10 mm or 12 mm shaft and lets a fitter drop the assembly into a finished box without pulling the box apart.

Wiring and limit setup

The motor arrives with 8.2 ft of white VVF cable in four conductors: line up, line down, neutral and ground. A wired switch reverses the direction by switching which of the two line conductors carries 120V. Never energize both at once. A proper interlocked rocker, a key switch or a dry-contact relay output handles that interlock for you.

Class I insulation means the ground conductor does real work here, so bond it. The IP 44 rating covers splashing water, which suits a shutter box behind a reveal or a closed awning cassette. Leave the cable out of standing water and out of direct sun.

No radio receiver sits inside this motor. RTS remotes, Zigbee hubs and TaHoma scenes do not reach it on their own. An installer who wants app control adds an external RTS or dry-contact receiver ahead of the motor and feeds the up and down lines from its output. Plan that receiver and its enclosure into the box space at rough-in.

Two adjusting screws on the head control the end points, one per direction. A fitter runs the curtain toward a limit on the switch, stops short, then turns the matching screw to walk the stop in or out. The 28-turn capacity gives room for a long drop, and the adjustment holds mechanically with no battery and no memory to lose during a power cut.

Assemble the tube, crown and drive before you set anything. Fit the drive stop. Mount the bracket and seat the pins. Run the curtain to each end under hand control and confirm the shutter seats into its sill at the bottom limit and the bottom bar stops clear of the box lintel at the top. Somfy publishes a 5 min thermal cut-out time, so a long commissioning session with repeated travel may stop the motor until it cools. Pause between runs.

Ordering the 2000645 and the parts around it

Order the Somfy Simu T5 10Nm 35rpm 120V motor (2000645) with the bracket and the tube kit together, since a motor on its own will not turn a tube. For a 60 mm round aluminum shutter tube in an 80 mm square box, that comes to the motor, the 9520049 bracket, the 9012950 drive and the 9910004 drive stop. Swap the 9011878 octagonal drive in for a 70 mm steel tube.

Replacing a failed Simu T5 is simpler. Read the label, confirm the 10/35 code, and reuse the crown, drive and bracket already in the box. The new motor seats in the same bracket and takes the same cable run.

Frequently asked questions

What tube size does the Simu T5 2000645 fit?

Somfy lists crowns and drives for this motor across 50 mm and 60 mm octagonal, 60 mm and 67 mm round, 70 mm octagonal, 70 mm Simbac, 71 mm Perma, 78 mm DS and 85 mm round tube. The motor body measures 1.97 in across, and the crown and drive pair you order has to match the tube profile.

How fast is 35 rpm on a rolling shutter?

At 35 rpm the tube completes 35 full turns per minute. On a 2.5 in tube that moves roughly 25 in of curtain per second of run time at mid-roll. A 60 in shutter clears its travel in a few seconds, against three times that on the 12 rpm version of the same torque.

Can I control the 2000645 with a Somfy remote?

Not on its own. This motor takes a wired 4-wire feed with no radio receiver inside. Add an external RTS or dry-contact receiver upstream of the motor, wire the up and down lines to its outputs, and the motor then answers a remote or a TaHoma scene through that receiver.

Which limit switch type does this motor use?

Mechanical limit switches with a 28-turn capacity. A fitter sets each end point with an adjusting screw on the head. The setting holds without power, so a utility outage leaves the limits where they were.

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