SEPTA42 Solar Array Drive Mechanism
Beyond Gravity (ex-RUAG Space)
Constellation SADM for small satellites, produced at up to 18 units per month with more than 100 flight models already delivered.
Typed specifications84 values
Discloses 11 of 13 fields engineers filter by in this category (category median 2).
- Mass
- 4 900 g excl. margin & customer-specific harness · datasheet p.4 4 900 g SEPTA42-C, excl. margin & customer-specific harness | 4 700 g SEPTA42-G1, excl. margin & customer-specific harness | 5 400 g SEPTA42-G2, excl. margin & customer-specific harness | 4 500 g SEPTA42-S1, excl. margin & customer-specific harness +1
- Slip-ring tracks
- 36 SEPTA42-C: number of power lines (1 line = 1 forward & 1 retu… · datasheet p.3 15 SEPTA42-S1 and -G1: number of power lines | 30 SEPTA42-S2 and -G2: number of power lines
- Envelope (L×W×H)
- max. outer diameter mounting flange 191 mm; length overall 159 mm SEPTA42-C (length from front of flange 125 mm) · datasheet p.4 max. outer diameter mounting flange 191 mm; length overall 152.9 mm SEPTA42-G1 (length from front of flange 119.5 mm) | max. outer diameter mounting flange 191 mm; length overall 212.9 mm SEPTA42-G2 (length from front of flange 179.5 mm) | max. outer diameter mounting flange 191 mm; length overall 141.4 mm SEPTA42-S1 (length from front of flange 108.2 mm) | max. outer diameter mounting flange 191 mm; length overall 191.4 mm SEPTA42-S2 (length from front of flange 158.0 mm)
- Power transfer
- 11 900 W datasheet p.4 11 900 W max · total power transfer, SEPTA42-C | 11 200 W max · total power transfer, SEPTA42-G1 | 22 400 W max · total power transfer, SEPTA42-G2 | 7 800 W max · total power transfer, SEPTA42-S1 +1
- Output torque
- 9 500 mN·m min · powered drive torque, continuous at 100 mA constant current · datasheet p.3 12 000 mN·m min · powered drive torque, continuous, boost mode - 130 mA constan…
- Rotation speed
- 0.167 rpm Maximum output · datasheet p.3 0.167 rpm max · maximum output speed (depends on motorization requirements)
- Supply voltage
- 150 V nom. · power line · datasheet p.4 25 V max · continuous | 25 V max · motor voltage, continuous | 70 V max · motor voltage, peak | 70 V max · peak
- Operating temperature
- -50 °C min · Cold Operational S/A conductive interface · datasheet p.6 -30 °C min · Cold Operational S/C conductive interface | -30 °C min · Cold Operational S/C radiative interface | 100 °C max · Hot Operational S/A conductive interface | 70 °C max · Hot Operational S/C conductive interface +4
- Design lifetime
- 12 years datasheet p.3 12 years life time
- TRL
- 8 TRL8 completed for all variants; TRL9 by projected launch end… · datasheet p.2
- Lead time
- 12 months rolling stock for lead times of 12 months · datasheet p.2
- Continuous rotation
- no SEPTA42-C: ± 175° · datasheet p.3 yes SEPTA42-S and SEPTA42-G: multiturn, forward and reverse
- Travel range
- 360 deg SEPTA42-S and SEPTA42-G: forward and reverse, multiturn (no "… · datasheet p.3 -175–175 deg SEPTA42-C: ± 175°
- Step size
- 0.007 deg output step size (full step), standard 1:36 gearbox · datasheet p.3
- Holding torque (unpowered)
- 18 000 mN·m min · powered, continuous at 100 mA constant current · datasheet p.3 25 000 mN·m min · powered, continuous, boost mode - 130 mA constant current | 1 400 mN·m min · unpowered, SEPTA42-C (varies with position between 1.4 Nm ...… | 3 000 mN·m min · unpowered, SEPTA42-S and -G
- Power and signal transfer
- cable wrap SEPTA42-C · datasheet p.2 other SEPTA42-S and -G: 1 or 2 slip rings (brush type not stated)
- Current per track
- 2.2 A rated power capacity per track, SEPTA42-C (2.2 ARMS) · datasheet p.3 5 A rated power capacity per track, SEPTA42-G (5.0 ARMS; 4.54 A l… | 3.5 A rated power capacity per track, SEPTA42-S (3.5 ARMS; 4.0 A on…
- Drive electronics
- external proven combinations with drive electronics (SADE) available · datasheet p.2
- Life, revolutions
- 181 000 min · SEPTA42-C: movements from -175° to +175° (life time qualifica… · datasheet p.3 58 000 min · SEPTA42-G: full revolutions (life time qualification sequence) | 133 000 min · SEPTA42-S: full revolutions (life time qualification sequence)
- Survival temperature
- -70 °C min · Cold Non-Operational (Survival) S/A conductive interface · datasheet p.6 -40 °C min · Cold Non-Operational (Survival) S/C conductive interface | -40 °C min · Cold Non-Operational (Survival) S/C radiative interface | 110 °C max · Hot Non-Operational (Survival) S/A conductive interface | 90 °C max · Hot Non-Operational (Survival) S/C conductive interface +4
- Random vibration
- 18.3 g RMS random vibrations, parallel to mounting plane (x, y axes) · datasheet p.4 20.3 g RMS random vibrations, perpendicular to mounting plane (z-axis)
- Flight heritage
- More than 100 FMs have been produced already; >100 FMs delivered to customers datasheet p.1
- Satellite class
- smallsat 100-500 kg datasheet p.2 microsat 10-100 kg
- Missions flown
- 100 datasheet p.2
- Shock qualification
- 20 g 100 Hz · datasheet p.6 500 g 1000 Hz | 1 865 g S42-C and S42-S: 4000 Hz and 10000 Hz | 2 000 g S42-G: 2500 Hz and 10000 Hz
- Max bending moment
- 600 N·m static bending load; axial load 10000 N, radial load 10000 N,… · datasheet p.4
- Voltage per track
- 150 V datasheet p.3
- Contact resistance
- 60 mΩ max · connector-to-connector at 20 °C (C: w/ 0.5 m S/A harness; S a… · datasheet p.3 80 mΩ max · connector-to-connector at worst hot case (C: w/ 0.5 m S/A har…
- Position feedback
- other redundant reference position switch at two different location… · datasheet p.3
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier7 lines, in the manufacturer's own wording
- Target application
- Small satellites and constellations
- Production rate
- Up to 18 units per month
- Units delivered
- More than 100 flight models
- Qualification status
- TRL8 completed for all variants; TRL9 by projected launch end of 2025
- Power transfer options
- One or two gold-on-gold slip rings, or cable wrap
- Lead time
- Rolling stock for lead times of 12 months
- Drive electronics
- Proven combinations with SADE drive electronics available
About
Beyond Gravity offers a modular family of Solar Array Drive Mechanisms to serve a large range of spacecraft. The SEPTA42 is available at attractive prices and lead times and can be produced in large quantities. More than 100 flight models have been produced already.
For the specific needs of small satellites and constellations, Beyond Gravity developed the SEPTA42 SADM. This mechanism is designed to greatly reduce cost without impacting reliability. The SEPTA42 comes with the same gold-on-gold slip rings as the high-power SADMs, for maximum reliability and good noise performance. Alternatively, the SEPTA42 can also be equipped with a cable wrap.
Modularity for lowest cost: a family of SADM for a large range of missions, standard mechanical interfaces and a standard actuator module for all types. Interfaces remain the same regardless of power class, which makes it ideal for scalable platforms. The configuration comprises an actuator module with one or two slip rings, or a cable wrap.
Robust and proven: flight proven slip ring technology, a standard actuator enabling industrial scale production, TRL8 completed for all variants with TRL9 by projected launch end of 2025, more than 100 flight models delivered to customers, and proven combinations with drive electronics (SADE) available.
High cadence at short lead times: a new cleanroom for state-of-the-art assembly and testing, up to 18 units per month, and rolling stock for lead times of 12 months.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.