Somfy LT60 680R2 80Nm Wired Motor Fit and Torque Guide

Tube inside diameter settles an LT60 purchase before torque does. The Somfy LT60 680R2 asks for 2.37 inches of clear inside diameter and measures 26.18 inches end to end, so the tube and the pocket decide the spec first. The load question follows: 80 Nm at 14 rpm, delivered through a star head.

Somfy builds the 600 Series for exterior work above the LT50 range. The 680R2 is the wired member of that family. An installer controls it with a rocker switch or a relay, not a radio remote, which suits buildings where the control wiring already runs to the shutter box.

The fitment numbers that decide this motor

Four measurements govern the install. Clear inside diameter of 2.37 inches, motor diameter of 2.36 inches, overall length of 26.18 inches, and 34 turns of limit capacity. Measure the tube inside, past any seam or stiffening rib. A 70mm octagonal tube takes the 680R2 with Somfy's matching crown and drive set. Round tubes from 2.75 inches up also work with the right crown.

Weight matters on a long run. The motor comes in at 9.5 pounds, and the bracket carries that plus the tube and the fabric. Somfy rates its Heavy Duty Angle Plate to 85 Nm, which covers the 680R2 with margin. Mount it into structure, not into cladding.

The 34-turn figure caps the travel. At 14 rpm the motor turns a 70mm tube through roughly 15 feet of drop before the limit unit runs out, and the exact number depends on fabric thickness and roll build-up. Measure the finished roll on a sample before you commit a tall shutter to this ref.

Awnings and shutters this motor drives

Somfy lists the 680R2 for awnings and rolling shutters. Lateral arm awnings on a commercial storefront, wide residential rolling shutters, and heavy exterior screens all sit inside its envelope. The 80 Nm rating gives an installer headroom on a 16 foot awning that a 50 Nm LT50 motor would labor against.

Exterior duty brings weather, and the IP 44 rating covers splashing water from any direction. Somfy publishes an operating range of -13 F to 158 F, so the 680R2 holds up through a northern winter and a desert summer. Thermal protection trips at 266 F with a 5 minute cool-down, which protects the windings when someone cycles a jammed shutter.

Noise sits at 65 dB. That reads loud against an interior shade motor, and it reads normal for a heavy exterior tubular motor moving a steel shutter curtain. Bedrooms behind a shutter box take the sound, so plan the box lining where quiet matters.

Verified specs for Somfy ref 1164262

Somfy publishes this ref under the code 680R2 LT60 80/14 SJTW 10FT U. The 10FT in that code names the cable, and the cable detaches at the head, which lets an installer swap in a 24 foot run without touching the motor.

Crowns, drives, brackets and spring rings

The 680R2 lands in a tube through a crown at the head end and a drive wheel that keys into the tube wall. Somfy's Octagonal LT60 70mm Crown and Drive Set (9012247) covers the common 70mm octagonal shutter tube and arrives as a matched pair, which removes the guesswork of pairing a crown to a drive by eye.

At the head, the star head drops into a bracket and locks with a spring ring. The Motor Bracket with Spring Ring, Square 120mm x 120mm (9763503) gives a large bolt pattern for masonry or a steel sub-frame, and Somfy lists it against this ref. For a shutter box with an existing round mount, the Universal Bracket with Spring Clip (9420631) appears on Somfy's accessory list for the 680R2 as well.

Pick the bracket from the box, not from the motor. The head geometry stays the same across both parts above, so the choice comes down to the bolt pattern you can reach and the clearance behind the tube.

Wiring a 4-wire motor into a switch or relay

Four conductors leave the head: line up, line down, neutral, and ground. A wired rocker switch energizes one direction at a time, and a dry-contact relay does the same job under a building automation system. Never bridge both directions at once. A momentary switch with mechanical interlock protects the motor and the limit unit.

Group control works through relays rather than through the motor. One relay channel drives several 680R2 units in parallel, and the 3.4 A rated current per motor sets the ceiling on how many share a channel. Add the currents, then size the relay and the branch circuit above that total.

The 680R2 carries no receiver, so an RTS remote or a Zigbee hub cannot reach it. Buyers who want radio control on the 600 Series platform should look at the Altus RTS motors in the LT60 range instead of adding a receiver to this ref.

Rapid push-button limit setting

Somfy fits this motor with a mechanical limit switch unit and rapid push-button adjustment at the head. An installer runs the shutter to the closed position, sets the lower limit, runs it up, and sets the upper limit. The buttons hold the setting through a power loss because the mechanism is mechanical, not electronic.

Two habits save callbacks. Set the limits with the fabric or curtain fitted, since a bare tube reaches a position the loaded tube will not. Then cycle the shutter four times and re-check both ends, because the roll settles after the first few runs and the closed position creeps.

Ordering the 680R2

Buyers who need 80 Nm on a wired circuit, with a star head and a 70mm or larger tube, order the Somfy LT60 680R2 Standard 120V 4-Wire Motor (1164262). Add the crown and drive set that matches your tube profile and the bracket your box allows, and the motor arrives ready to set limits.

Shoppers sizing up or down inside the 600 Series will find the 660R2 at 60 Nm and the 6100R2 at 100 Nm on the same body and the same 2.37 inch tube requirement, which keeps the hardware list identical when a project changes torque.

Frequently asked questions

What tube does the Somfy LT60 680R2 fit?

Somfy publishes a minimum inside diameter of 2.37 inches for ref 1164262. A 70mm octagonal shutter tube takes it with the 9012247 crown and drive set, and round tubes from 2.75 inches up take it with the matching round crown. Measure the clear inside diameter past any seam before ordering.

How much torque does the 680R2 deliver?

The 680R2 delivers 80 Nm, or 704 inch-pounds, at 14 rpm. That rating covers large lateral arm awnings and wide rolling shutters above what a 50 Nm LT50 motor handles. Somfy rates the Heavy Duty Angle Plate accessory to 85 Nm, which matches this motor with margin to spare.

Can the LT60 680R2 work with an RTS remote?

No. The 680R2 is a 4-wire motor with no built-in receiver, so a wired switch or a dry-contact relay controls it. Somfy offers Altus RTS motors in the LT60 range for radio control. Choose the RTS version at the point of purchase rather than retrofitting control onto this ref.

What cable comes with ref 1164262?

Somfy supplies a removable SJTW cable, 4 conductor, white, 9.84 feet long. The cable detaches at the motor head, so an installer swaps in a longer run without replacing the motor. Somfy lists 10 foot and 24 foot SJTW assemblies plus per-foot cable for the LT50 and LT60 families.

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