What supply voltage and frequency does each use?

Rated voltage — Somfy Altus® RTS 550R2: 120 V; Somfy Altus® RTS 540R2: 120 V. Mains frequency — Somfy Altus® RTS 550R2: 60 Hz; Somfy Altus® RTS 540R2: 60 Hz. Power supply type — Somfy Altus® RTS 550R2: AC mains; Somfy Altus® RTS 540R2: AC mains.

What torque and speed is each rated for?

Rated torque — Somfy Altus® RTS 550R2: 50 Nm; Somfy Altus® RTS 540R2: 40 Nm. Rated speed — Somfy Altus® RTS 550R2: 14 rpm; Somfy Altus® RTS 540R2: 14 rpm.

What protocols and control options does each support?

Limit setting — Somfy Altus® RTS 550R2: Electronic; Somfy Altus® RTS 540R2: Electronic. Control protocol — Somfy Altus® RTS 550R2: RTS; Somfy Altus® RTS 540R2: RTS.

Which durability indicators does each publish?

OpenAxia does not rate reliability; the published indicators are: IP rating — Somfy Altus® RTS 550R2: IP44; Somfy Altus® RTS 540R2: IP44.

Somfy Altus® RTS: 550R2 vs 540R2 Compared

Rated power input — Somfy Altus® RTS 550R2: 250 W^{[2; 2026-09-30]}; Somfy Altus® RTS 540R2: 210 W^{[2; 2026-09-30]}.

Rated current — Somfy Altus® RTS 550R2: 2.1 A^{[1; 2026-10-07]}; Somfy Altus® RTS 540R2: 1.8 A^{[1; 2026-10-07]}.

Standby power — Somfy Altus® RTS 550R2: 0 W^{[2; 2026-10-01]}; Somfy Altus® RTS 540R2: 0.37 W^{[2; 2026-10-01]}.

Last verified: 2026-10-07

When to choose Somfy Altus® RTS 550R2

For 120 V^{[1; 2026-10-07]} / 60 Hz^{[1; 2026-10-07]} mains.
For the stated supply type: AC mains^{[1; 2026-10-07]}.
For a rated torque of 50 Nm^{[1; 2026-10-07]}.
For a rated speed of 14 rpm^{[1; 2026-10-07]}.

When to choose Somfy Altus® RTS 540R2

For 120 V^{[1; 2026-10-07]} / 60 Hz^{[1; 2026-10-07]} mains.
For the stated supply type: AC mains^{[1; 2026-10-07]}.
For a rated torque of 40 Nm^{[1; 2026-10-07]}.
For a rated speed of 14 rpm^{[1; 2026-10-07]}.

Verifiable indicators

Short-time duty (S2) — Somfy Altus® RTS 550R2: Not published. Somfy Altus® RTS 540R2: Not published.

Rated life — Somfy Altus® RTS 550R2: Not published. Somfy Altus® RTS 540R2: Not published.

Thermal protection — Somfy Altus® RTS 550R2: Not published. Somfy Altus® RTS 540R2: Not published.

IP rating — Somfy Altus® RTS 550R2: IP44^{[1; 2026-10-07]}; Somfy Altus® RTS 540R2: IP44^{[1; 2026-10-07]}.

Comparison table
Property	Somfy Altus® RTS 550R2Somfy1038170	Somfy Altus® RTS 540R2Somfy1240556
Series & variant axes
Series	Altus 50	Altus 50
Control protocol	RTS (from model name)	RTS (from model name)
Power supply	AC mains	AC mains
TorqueDiffers: 50 Nm vs 40 Nm	50 Nm	40 Nm
Electrical
Rated voltage	120 V^{[1; 2026-10-07]}	120 V^{[1; 2026-10-07]}
Mains frequency	60 Hz^{[1; 2026-10-07]}	60 Hz^{[1; 2026-10-07]}
Power supply type	AC mains^{[1; 2026-10-07]}	AC mains^{[1; 2026-10-07]}
Rated power inputDiffers: 250 W^{[2; 2026-09-30]} vs 210 W^{[2; 2026-09-30]}	250 W^{[2; 2026-09-30]}	210 W^{[2; 2026-09-30]}
Standby powerDiffers: 0 W^{[2; 2026-10-01]} vs 0.37 W^{[2; 2026-10-01]}	0 W^{[2; 2026-10-01]}Lowest stated	0.37 W^{[2; 2026-10-01]}
Rated currentDiffers: 2.1 A^{[1; 2026-10-07]} vs 1.8 A^{[1; 2026-10-07]}	2.1 A^{[1; 2026-10-07]}	1.8 A^{[1; 2026-10-07]}
Cable length	2 m^{[1; 2026-10-07]}	2 m^{[1; 2026-10-07]}
Drive performance
Rated torqueDiffers: 50 Nm^{[1; 2026-10-07]} vs 40 Nm^{[1; 2026-10-07]}	50 Nm^{[1; 2026-10-07]}	40 Nm^{[1; 2026-10-07]}
Rated speed	14 rpm^{[1; 2026-10-07]}	14 rpm^{[1; 2026-10-07]}
Limits & protection
Limit setting	Electronic^{[1; 2026-10-07]}	Electronic^{[1; 2026-10-07]}
Limit range	250 turns^{[1; 2026-10-07]}	250 turns^{[1; 2026-10-07]}
Control & communication
Control protocol	RTS^{[2; 2026-09-30]}	RTS^{[2; 2026-09-30]}
Radio frequency	433.42 MHz^{[2; 2026-10-01]}	433.42 MHz^{[2; 2026-10-01]}
Radio range	200 m^{[2; 2026-10-01]}	200 m^{[2; 2026-10-01]}
Max paired transmitters	12 pcs^{[2; 2026-10-01]}	12 pcs^{[2; 2026-10-01]}
Environment & protection
IP rating	IP44^{[1; 2026-10-07]}	IP44^{[1; 2026-10-07]}
Operating temp. (min)	-10 °C^{[1; 2026-10-07]}	-10 °C^{[1; 2026-10-07]}
Operating temp. (max)	40 °C^{[1; 2026-10-07]}	40 °C^{[1; 2026-10-07]}
Noise level	55 dB(A)^{[2; 2026-09-30]}	Not published
View all 7 variants
Documents	Official datasheet ↗	Official datasheet ↗

Same-series variants

Variant axis	Somfy Altus® RTS 550R2	Somfy Altus® RTS 540R2
Torque	50 Nm^{[Somfy PDF catalogue lt50altus_rts-d0028.pdf; 2026-10-07]}	40 Nm^{[Somfy PDF catalogue lt50altus_rts-d0028.pdf; 2026-10-07]}

Questions and answers

What supply voltage and frequency does each use?: Rated voltage — Somfy Altus® RTS 550R2: 120 V; Somfy Altus® RTS 540R2: 120 V. Mains frequency — Somfy Altus® RTS 550R2: 60 Hz; Somfy Altus® RTS 540R2: 60 Hz. Power supply type — Somfy Altus® RTS 550R2: AC mains; Somfy Altus® RTS 540R2: AC mains.
What torque and speed is each rated for?: Rated torque — Somfy Altus® RTS 550R2: 50 Nm; Somfy Altus® RTS 540R2: 40 Nm. Rated speed — Somfy Altus® RTS 550R2: 14 rpm; Somfy Altus® RTS 540R2: 14 rpm.
What protocols and control options does each support?: Limit setting — Somfy Altus® RTS 550R2: Electronic; Somfy Altus® RTS 540R2: Electronic. Control protocol — Somfy Altus® RTS 550R2: RTS; Somfy Altus® RTS 540R2: RTS.
Which durability indicators does each publish?: OpenAxia does not rate reliability; the published indicators are: IP rating — Somfy Altus® RTS 550R2: IP44; Somfy Altus® RTS 540R2: IP44.

Sources

↑Somfy PDF catalogueservice.somfy.comRated voltage: Voltage Supply: 120V AC, 60Hz [1037511] (p. 1)Manufacturer-stated · Observed 2026-10-07 · Retrieved 2026-10-06 · Public web pageUsed for: 51011, 50999, 51013, 51001, 51012, 51000, 51021, 51009, 51019, 51007, 51020, 51008, 51022, 51010, 51015, 51003, 51016, 51004, 51014, 51002, 51017, 51005, 51018, 51006
↑Somfy Systems (North America) manufacturer site (product catalog)somfysystems.comRated power input: Consumption during operation 250 WManufacturer-stated · Observed 2026-09-30 · Retrieved 2026-09-30 · Public web pageUsed for: 3682, 4176, 10144, 10428, 3684, 4178, 10141, 10425, 10143, 10427, 10142, 10426, 3680

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Somfy Altus® RTS 550R2 vs Somfy Altus® RTS 540R2