Somfy LT50 530R2 Wired Motor Torque and Tube Fit Guide

Torque and tube bore settle the Somfy LT50 530R2 question before any other number matters. The motor turns 30 Nm at 14 rpm off a 120 V supply, seats inside a 50 mm tube, and answers a wired switch or a relay. No radio receiver lives in this head. Contractors who pull line voltage during framing put the 530R2 on the plan sheet and never think about batteries or pairing again.

Torque placement in the LT50 wired range

Somfy builds the 500 Series around one 1.97 in motor body and changes the gearbox behind it. The 530R2 sits in the upper middle of that ladder at 30 Nm, above the 15 and 20 Nm heads and below the 40 and 50 Nm heads. Somfy holds the 530R2 at 14 rpm, the same pace the 50 Nm 550R2 runs, so stepping up in torque inside this range costs you nothing in travel time.

Fabric weight, tube diameter and curtain drop set the torque you need. A lateral arm awning with a 12 ft projection on a 70 mm octagonal tube lands in 30 Nm territory. Extruded aluminium shutter slats pull harder per square foot than acrylic awning cloth, so weigh the curtain instead of copying a torque figure off a similar looking opening down the street. Somfy caps the 530R2 at 46 limit turns, and that number governs drop, not lifting power.

Awnings and rolling shutters this motor drives

Somfy publishes two applications for reference 1045793: awnings and rolling shutters. Both live outdoors. The IP 44 housing and the operating window from -13 F to 158 F carry the motor through a Minnesota January and a Phoenix August. Somfy ships it with a 9.84 ft SJTW four conductor pigtail, a jacket rated for wet locations.

Lateral arm awnings, cassette awnings, drop arm awnings and exterior rolling shutters all sit inside those two headings. A 30 Nm head covers a wide span of residential and light commercial work. Shutters large enough to need 60 mm tube move up to the Somfy LT60 range, where torque starts at 60 Nm and the tube bore grows to 2.37 in.

Verified specs for the 530R2

Figures come from Somfy's published data for reference 1045793 on somfypro.com.

Tube fit, crowns, drives and brackets

The motor body measures 1.97 in across and asks for 1.85 in of clear inner diameter in the tube. Treat 1.85 in as the floor. A tube with a weld seam, an internal rib or a powder coat build sitting below that figure will bind the motor and load the gearbox sideways, and the 22.17 in body length tells you the shortest tube the assembly accepts once you add the crown, the drive and the idler.

Two crown and drive sets cover most LT50 exterior work. The Somfy Octagonal LT50 70mm Crown and Drive Set (9012234) matches the 70 mm octagonal tube that dominates awning fabrication, and the flats of the octagon carry the drive torque without a set screw. The Somfy LT50 2.5" Round Crown and Drive Set (9012231) handles 2.5 in round tube on shutters and exterior screens. Match the set to the tube profile you ordered, not to the motor.

Somfy snaps the drive wheel onto the motor shaft, so assembly on the bench takes seconds and a failed drive swaps out without pulling the motor from the tube.

A star head needs a bracket cut for a star. The Somfy LT50 Star Head Motor Bracket (9410651) receives the 530R2 head direct and indexes it against rotation, which is the whole job of the bracket on a motor making 30 Nm. Fasten it into structure. A star bracket screwed into a soffit board transmits every start and stop into the ceiling.

The Somfy LT50 Universal Motor Bracket (9410665) gives you a second mounting pattern when the hood geometry or the existing hole layout fights the star plate. Installers reaching into a retrofit hood pick the universal bracket for the extra placement freedom.

Somfy lets you index the motor head in six positions, which matters when the pigtail has to exit toward the junction box on one side of the hood. Set that orientation on the bench before the tube goes up.

Wiring and limit setup

Four conductors leave the head: an up leg, a down leg, a neutral and a ground. A momentary wall switch, a Somfy wired control or a third party relay feeds the two travel legs, and the motor runs whichever leg carries line voltage. Never energize both at once. One switch drives one motor on this topology, so a six shutter elevation wants a relay bank or a switch per opening.

Somfy fits mechanical limit switches with 46 turns of capacity. Set the open and closed stops at the head before the tube goes into the brackets, then cycle the full travel twice and confirm the fabric lands where the fabricator intended. Mechanical limits hold their setting through a power loss, which is one reason this motor still ships on commercial shutter work decades into the platform.

Class I wiring means the ground conductor does real work here. Bond it. The 170 W draw at 1.5 A sits inside a standard 15 A branch circuit with room for several motors, and the 0 W standby figure means an elevation of eight shutters adds nothing to the building load between cycles.

Ordering the 530R2 and the parts around it

Buy the motor, the crown and drive set, and the bracket as one package. A 530R2 arriving without a crown sized to your tube sits in the box until the second order lands. The Somfy 530R2 120V 4-Wire Motor (1045793) covers the drive side, and the four parts linked above cover tube and mount for octagonal or round tube on a star bracket or a universal plate.

Use LT50 crowns and drives on this motor. Parts cut for the 60 mm LT60 body will not seat, and 40 mm interior shade hardware has no relationship to a 50 mm exterior tube. Pair the 530R2 with a wired control. Radio remotes need a motor with a receiver or an external RTS receiver between the switch leg and the motor.

Frequently asked questions

What tube does the Somfy 530R2 fit?

Somfy publishes a 1.85 in minimum inner diameter for reference 1045793. The motor body itself measures 1.97 in across and runs 22.17 in long. A 70 mm octagonal tube or a 2.5 in round tube both clear that bore with the matching Somfy crown and drive set installed.

How much weight will 30 Nm lift?

Lifting capacity depends on tube diameter, because torque acts on the radius of the roll. A 30 Nm motor on a 70 mm tube produces more lift at the fabric than the same motor on a 100 mm roll. Weigh the finished curtain and work the figure against your tube, or send the fabrication detail to our team.

Does the 530R2 work with a Somfy remote?

The 530R2 carries no radio receiver. Control comes from a wired switch, a Somfy wired controller or a relay output on a building system. Adding an external RTS receiver ahead of the motor brings remote control to a wired installation when the job calls for it.

Which bracket holds a star head motor?

The Somfy LT50 Star Head Motor Bracket (9410651) accepts the star head direct and stops the motor rotating under load. The Somfy LT50 Universal Motor Bracket (9410665) offers a different hole pattern for retrofit hoods and awkward hood geometry. Both mount to structure rather than to trim.

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