What supply voltage and frequency does each use?

Rated voltage — Somfy 535A2 RS485: 120 V; Somfy 535A2 RTS CMO: 120 V. Mains frequency — Somfy 535A2 RS485: 60 Hz; Somfy 535A2 RTS CMO: 60 Hz. Power supply type — Somfy 535A2 RS485: AC mains; Somfy 535A2 RTS CMO: AC mains.

What torque and speed is each rated for?

Rated torque — Somfy 535A2 RS485: 35 Nm; Somfy 535A2 RTS CMO: 35 Nm. Rated speed — Somfy 535A2 RTS CMO: 20 rpm.

What protocols and control options does each support?

Limit setting — Somfy 535A2 RS485: Electronic; Somfy 535A2 RTS CMO: Electronic. Control protocol — Somfy 535A2 RS485: RS-485; Somfy 535A2 RTS CMO: RTS.

Which durability indicators does each publish?

OpenAxia does not rate reliability; the published indicators are: Short-time duty (S2) — Somfy 535A2 RS485: 4 min. IP rating — Somfy 535A2 RS485: IP44; Somfy 535A2 RTS CMO: IP44.

Somfy 535A2 RS485 vs Somfy 535A2 RTS CMO: Specs Compared

Standby power — Somfy 535A2 RS485: 0.5 W^{[3; 2026-10-01]}; Somfy 535A2 RTS CMO: 0 W^{[3; 2026-10-17]}.

Cable length — Somfy 535A2 RS485: 3 m^{[1; 2026-10-06]}; Somfy 535A2 RTS CMO: 3.6 m^{[2; 2026-10-07]}.

Limit range — Somfy 535A2 RS485: 300 turns^{[1; 2026-10-06]}; Somfy 535A2 RTS CMO: 34 turns^{[2; 2026-10-07]}.

Last verified: 2026-10-17

When to choose Somfy 535A2 RS485

For 120 V^{[1; 2026-10-06]} / 60 Hz^{[1; 2026-10-06]} mains.
For the stated supply type: AC mains^{[1; 2026-10-06]}.
For a rated torque of 35 Nm^{[1; 2026-10-06]}.
For the stated control protocol: RS-485^{[3; 2026-09-30]}.

When to choose Somfy 535A2 RTS CMO

For 120 V^{[2; 2026-10-07]} / 60 Hz^{[2; 2026-10-07]} mains.
For the stated supply type: AC mains^{[2; 2026-10-07]}.
For a rated torque of 35 Nm^{[2; 2026-10-07]}.
For a rated speed of 20 rpm^{[2; 2026-10-07]}.

Verifiable indicators

Short-time duty (S2) — Somfy 535A2 RS485: 4 min^{[1; 2026-10-06]}. Somfy 535A2 RTS CMO: Not published.

Rated life — Somfy 535A2 RS485: Not published. Somfy 535A2 RTS CMO: Not published.

Thermal protection — Somfy 535A2 RS485: Not published. Somfy 535A2 RTS CMO: Not published.

IP rating — Somfy 535A2 RS485: IP44^{[1; 2026-10-06]}; Somfy 535A2 RTS CMO: IP44^{[2; 2026-10-07]}.

Comparison table
Property	Somfy 535A2 RS485Somfy1002288	Somfy 535A2 RTS CMOSomfy1047306
Series & variant axes
Series	LT50	LT50
Control protocolDiffers: RS-485 (from model name) vs RTS (from model name)	RS-485 (from model name)	RTS (from model name)
Power supply	AC mains	AC mains
Torque	35 Nm	35 Nm
Electrical
Rated voltage	120 V^{[1; 2026-10-06]}	120 V^{[2; 2026-10-07]}
Mains frequency	60 Hz^{[1; 2026-10-06]}	60 Hz^{[2; 2026-10-07]}
Power supply type	AC mains^{[1; 2026-10-06]}	AC mains^{[2; 2026-10-07]}
Rated power input	250 W^{[3; 2026-09-30]}	250 W^{[3; 2026-10-17]}
Standby powerDiffers: 0.5 W^{[3; 2026-10-01]} vs 0 W^{[3; 2026-10-17]}	0.5 W^{[3; 2026-10-01]}	0 W^{[3; 2026-10-17]}Lowest stated
Rated current	2.1 A^{[1; 2026-10-06]}	2.1 A^{[2; 2026-10-07]}
Cable lengthDiffers: 3 m^{[1; 2026-10-06]} vs 3.6 m^{[2; 2026-10-07]}	3 m^{[1; 2026-10-06]}	3.6 m^{[2; 2026-10-07]}
Drive performance
Rated torque	35 Nm^{[1; 2026-10-06]}	35 Nm^{[2; 2026-10-07]}
Rated speed	Not published	20 rpm^{[2; 2026-10-07]}
Short-time duty (S2)	4 min^{[1; 2026-10-06]}	Not published
Limits & protection
Limit setting	Electronic^{[1; 2026-10-06]}	Electronic^{[2; 2026-10-07]}
Limit rangeDiffers: 300 turns^{[1; 2026-10-06]} vs 34 turns^{[2; 2026-10-07]}	300 turns^{[1; 2026-10-06]}	34 turns^{[2; 2026-10-07]}
Control & communication
Control protocolDiffers: RS-485^{[3; 2026-09-30]} vs RTS^{[3; 2026-10-17]}	RS-485^{[3; 2026-09-30]}	RTS^{[3; 2026-10-17]}
Radio frequency	Not published	433.42 MHz^{[3; 2026-10-17]}
Max paired transmitters	Not published	12 pcs^{[3; 2026-10-17]}
Environment & protection
IP rating	IP44^{[1; 2026-10-06]}	IP44^{[2; 2026-10-07]}
Operating temp. (min)Differs: -20 °C^{[1; 2026-10-06]} vs -10 °C^{[2; 2026-10-07]}	-20 °C^{[1; 2026-10-06]}Lowest stated	-10 °C^{[2; 2026-10-07]}
Operating temp. (max)Differs: 60 °C^{[1; 2026-10-06]} vs 40 °C^{[2; 2026-10-07]}	60 °C^{[1; 2026-10-06]}Highest stated	40 °C^{[2; 2026-10-07]}
Noise level	55 dB(A)^{[1; 2026-10-06]}	Not published
View all 24 variants
Documents	Official datasheet ↗	Official datasheet ↗

Same-series variants

Variant axis	Somfy 535A2 RS485	Somfy 535A2 RTS CMO
Control protocol	RS-485 (from model name)	RTS (from model name)

Questions and answers

What supply voltage and frequency does each use?: Rated voltage — Somfy 535A2 RS485: 120 V; Somfy 535A2 RTS CMO: 120 V. Mains frequency — Somfy 535A2 RS485: 60 Hz; Somfy 535A2 RTS CMO: 60 Hz. Power supply type — Somfy 535A2 RS485: AC mains; Somfy 535A2 RTS CMO: AC mains.
What torque and speed is each rated for?: Rated torque — Somfy 535A2 RS485: 35 Nm; Somfy 535A2 RTS CMO: 35 Nm. Rated speed — Somfy 535A2 RTS CMO: 20 rpm.
What protocols and control options does each support?: Limit setting — Somfy 535A2 RS485: Electronic; Somfy 535A2 RTS CMO: Electronic. Control protocol — Somfy 535A2 RS485: RS-485; Somfy 535A2 RTS CMO: RTS.
Which durability indicators does each publish?: OpenAxia does not rate reliability; the published indicators are: Short-time duty (S2) — Somfy 535A2 RS485: 4 min. IP rating — Somfy 535A2 RS485: IP44; Somfy 535A2 RTS CMO: IP44.

Sources

↑Somfy PDF catalogue lt50rs485-d0034service.somfy.comRated voltage: Voltage Supply: 120V AC, 60Hz [1002288] (p. 1)Manufacturer-stated · Observed 2026-10-06 · Retrieved 2026-10-06 · Public web pageUsed for: 50311, 50313, 50312, 50321, 50319, 50320, 50322, 50315, 50316, 50314, 50317, 50318, 50323
↑Somfy PDF catalogueservice.somfy.comRated voltage: Voltage Supply: 120V AC, 60Hz [1047010] (p. 1)Manufacturer-stated · Observed 2026-10-07 · Retrieved 2026-10-06 · Public web pageUsed for: 51221, 51223, 51222, 51231, 51229, 51230, 51232, 51227, 51228, 51226, 51224, 51225
↑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: 4303, 59026, 10474, 59027, 4305, 59028, 59029, 59030

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