What supply voltage and frequency does each use?

Rated voltage — Somfy Roll Up Wired R28 (Starhole Mount): 24 V; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: 12 V. Power supply type — Somfy Roll Up Wired R28 (Starhole Mount): DC; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: Battery, DC.

What torque and speed is each rated for?

Rated torque — Somfy Roll Up Wired R28 (Starhole Mount): 0.8 Nm; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: 1.1 Nm. Rated speed — Somfy Roll Up Wired R28 (Starhole Mount): 30 rpm; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: 20 rpm.

What protocols and control options does each support?

Limit setting — Somfy Roll Up Wired R28 (Starhole Mount): Electronic; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: Electronic. Control protocol — Somfy Roll Up 28 · 1.1 Nm · 20 rpm: RTS.

What certifications are on record for each?

Marks stated by vendor — Somfy Roll Up Wired R28 (Starhole Mount): CE; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: CE.

Somfy Roll Up: 24 V vs 12 V

Rated voltage — Somfy Roll Up Wired R28 (Starhole Mount): 24 V^{[1; 2026-10-07]}; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: 12 V^{[2; 2026-10-06]}.

Rated torque — Somfy Roll Up Wired R28 (Starhole Mount): 0.8 Nm^{[1; 2026-10-07]}; Somfy Roll Up 28 · 1.1 Nm^{[2; 2026-10-06]} · 20 rpm: 1.1 Nm.

Rated speed — Somfy Roll Up Wired R28 (Starhole Mount): 30 rpm^{[1; 2026-10-07]}; Somfy Roll Up 28 · 1.1 Nm · 20 rpm^{[2; 2026-10-06]}: 20 rpm.

Last verified: 2026-10-07

When to choose Somfy Roll Up Wired R28 (Starhole Mount)

For a supply rated 24 V^{[1; 2026-10-07]}.
For the stated supply type: DC^{[1; 2026-10-07]}.
For a rated torque of 0.8 Nm^{[1; 2026-10-07]}.
For a rated speed of 30 rpm^{[1; 2026-10-07]}.

When to choose Somfy Roll Up 28 · 1.1 Nm · 20 rpm

For a supply rated 12 V^{[2; 2026-10-06]}.
For the stated supply type: Battery^{[2; 2026-10-06]}, DC^{[2; 2026-10-06]}.
For a rated torque of 1.1 Nm^{[2; 2026-10-06]}.
For a rated speed of 20 rpm^{[2; 2026-10-06]}.

Verifiable indicators

Short-time duty (S2) — Somfy Roll Up Wired R28 (Starhole Mount): Not published. Somfy Roll Up 28 · 1.1 Nm · 20 rpm: Not published.

Rated life — Somfy Roll Up Wired R28 (Starhole Mount): Not published. Somfy Roll Up 28 · 1.1 Nm · 20 rpm: Not published.

Thermal protection — Somfy Roll Up Wired R28 (Starhole Mount): Not published. Somfy Roll Up 28 · 1.1 Nm · 20 rpm: Not published.

IP rating — Somfy Roll Up Wired R28 (Starhole Mount): IP30^{[1; 2026-10-07]}; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: IP20^{[2; 2026-10-06]}.

Comparison table
Property	Somfy Roll Up Wired R28 (Starhole Mount)Somfy1002834	Somfy Roll Up 28 · 1.1 Nm · 20 rpmSomfy1240291
Series & variant axes
Series	Roll Up 28	Roll Up 28
Power supplyDiffers: DC vs Battery · DC	DC	Battery · DC
Electrical
Rated voltageDiffers: 24 V^{[1; 2026-10-07]} vs 12 V^{[2; 2026-10-06]}	24 V^{[1; 2026-10-07]}	12 V^{[2; 2026-10-06]}
Power supply type	DC^{[1; 2026-10-07]}	Battery^{[2; 2026-10-06]}, DC^{[2; 2026-10-06]}
Rated power input	7.7 W^{[3; 2026-09-30]}	Not published
Standby power	0.407 W^{[3; 2026-10-01]}	Not published
Drive performance
Rated torqueDiffers: 0.8 Nm^{[1; 2026-10-07]} vs 1.1 Nm^{[2; 2026-10-06]}	0.8 Nm^{[1; 2026-10-07]}	1.1 Nm^{[2; 2026-10-06]}
Rated speedDiffers: 30 rpm^{[1; 2026-10-07]} vs 20 rpm^{[2; 2026-10-06]}	30 rpm^{[1; 2026-10-07]}	20 rpm^{[2; 2026-10-06]}
Limits & protection
Limit setting	Electronic^{[1; 2026-10-07]}	Electronic^{[2; 2026-10-06]}
Limit range	60 turns^{[1; 2026-10-07]}	Not published
Control & communication
Control protocol	Not published	RTS^{[2; 2026-10-06]}
Radio frequency	Not published	433.42 MHz^{[2; 2026-10-06]}
Radio range	Not published	200 m^{[3; 2026-10-05]}
Battery & charging
Battery (as stated)	Not applicable	12V 2600 mAh (built-in Lithium-ion)^{[2; 2026-10-06]}
Battery capacity	Not applicable	2,600 mAh^{[2; 2026-10-06]}
Environment & protection
IP ratingDiffers: IP30^{[1; 2026-10-07]} vs IP20^{[2; 2026-10-06]}	IP30^{[1; 2026-10-07]}Highest stated	IP20^{[2; 2026-10-06]}
Operating temp. (min)Differs: -10 °C^{[1; 2026-10-07]} vs 0 °C^{[2; 2026-10-06]}	-10 °C^{[1; 2026-10-07]}Lowest stated	0 °C^{[2; 2026-10-06]}
Operating temp. (max)Differs: 85 °C^{[1; 2026-10-07]} vs 60 °C^{[2; 2026-10-06]}	85 °C^{[1; 2026-10-07]}Highest stated	60 °C^{[2; 2026-10-06]}
Noise levelDiffers: 48 dB(A)^{[1; 2026-10-07]} vs 56 dB(A)^{[3; 2026-10-05]}	48 dB(A)^{[1; 2026-10-07]}Lowest stated	56 dB(A)^{[3; 2026-10-05]}
Compliance & declarations
Marks stated by vendor	CE^{[3; 2026-10-01]}	CE^{[3; 2026-10-05]}
View all 7 variants
Documents	Official datasheet ↗	Request datasheet

Same-series variants

Variant axis	Somfy Roll Up Wired R28 (Starhole Mount)	Somfy Roll Up 28 · 1.1 Nm · 20 rpm
Power supply	DC^{[Somfy PDF catalogue rollup_wired_r28_wt_spec_sheet_feb_2016.pdf; 2026-10-07]}	Battery^{[Somfy PDF catalogue wirefreedatabook_05.14.19.pdf; 2026-10-06]}DC^{[Somfy PDF catalogue wirefreedatabook_05.14.19.pdf; 2026-10-06]}

Questions and answers

What supply voltage and frequency does each use?: Rated voltage — Somfy Roll Up Wired R28 (Starhole Mount): 24 V; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: 12 V. Power supply type — Somfy Roll Up Wired R28 (Starhole Mount): DC; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: Battery, DC.
What torque and speed is each rated for?: Rated torque — Somfy Roll Up Wired R28 (Starhole Mount): 0.8 Nm; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: 1.1 Nm. Rated speed — Somfy Roll Up Wired R28 (Starhole Mount): 30 rpm; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: 20 rpm.
What protocols and control options does each support?: Limit setting — Somfy Roll Up Wired R28 (Starhole Mount): Electronic; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: Electronic. Control protocol — Somfy Roll Up 28 · 1.1 Nm · 20 rpm: RTS.
What certifications are on record for each?: Marks stated by vendor — Somfy Roll Up Wired R28 (Starhole Mount): CE; Somfy Roll Up 28 · 1.1 Nm · 20 rpm: CE.

Sources

↑Somfy PDF catalogueservice.somfy.comRated voltage: Voltage Supply: 24V DC [1002834] (p. 1)Manufacturer-stated · Observed 2026-10-07 · Retrieved 2026-10-06 · Public web pageUsed for: 51253, 51254, 51258, 51260, 51256, 51257, 51255, 51261, 51262, 51259
↑Somfy PDF catalogueservice.somfy.comRated voltage: Voltage Supply: 12V DC [1240291] (p. 6)Manufacturer-stated · Observed 2026-10-06 · Retrieved 2026-10-06 · Public web pageUsed for: 50458, 50460, 50459, 50465, 50466, 50462, 50467, 50468, 50469, 50470, 50461, 50463, 50464
↑Somfy Systems (North America) manufacturer site (product catalog)somfysystems.comRated power input: Consumption during operation 7.7 WManufacturer-stated · Observed 2026-09-30 · Retrieved 2026-09-30 · Public web pageUsed for: 4454, 10532, 49827, 49829, 10533, 49830

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Somfy Roll Up Wired R28 (Starhole Mount) vs Somfy Roll Up 28 · 1.1 Nm · 20 rpm