Servo Motor Encoder VLS-170 | Space-Rated Precision

VLS-170

The Netzer VLS-170 absolute rotary encoder provides up to 23-bit resolution with 0.006 Degree accuracy in an ultra-thin (<7 mm), lightweight (<110g) design. Built for extreme precision in space systems, satellite control mechanisms, and high-purity environments, its contactless technology eliminates wear and ensures long-term stability. The hollow, low-mass structure optimizes weight-sensitive applications while maintaining superior accuracy.

Trusted by leading space-comms programs, Netzer VLS encoders support APT subsystems and high-throughput optical links—including OISLs, FSO, DSOC, and ISLs. Their high-resolution, non-contact architecture reduces inertia and backlash, providing deterministic feedback for precision pointing, rapid acquisition, and stable tracking—ideal for satellites, optical terminals, and advanced photonics platforms.

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Features

Extreme Precision: Achieves accuracy better than 0.006 degrees, making it ideal for high-precision positioning systems.
Hollow Shaft Design: Optimized for improved dynamic response and seamless integration into rotary motion systems.
EMI & RFI Resistant: Designed to withstand electromagnetic and radio frequency interference, ensuring stable and reliable performance.
Contactless Operation: Utilizes capacitive sensing technology, eliminating mechanical wear and extending lifespan.
Durable & Reliable: Built for long-term use in harsh industrial environments.
Temperature Drift Compensation: Maintains accuracy stability across varying environmental conditions.

Unique Values

Space tested
High precision
Immunity to Magnetic
Repeatability

OD

170 mm
ID

110 mm
Height

7 mm
Weight

110 gr
Resolution

17-23 bit
Accuracy

±0.006°˚

Technical Data

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General

Angular resolution 17-23 bit
Nominal position accuracy ±0.006°
Repeatability 0.7 mdeg / 2.5 Arcsec
Maximum operational speed 2,000 rpm
Measurement range Single Turn Absolute with optional shaft turn counter
Built In Test BIT Optional
Rotation direction Adjustable CW/CCW (Default same direction from bottom side of the encoder)

Mechanical

Allowable mounting eccentricity ±0.1 mm
Allowable axial mounting tolerance ±0.3 mm
Rotor inertia 205,330 gr · mm²
Total weight 110 gr
Outer Ø /Inner Ø / Height 170 / 110 / 7 mm
Material (stator / rotor) Polyimide
Nominal air gap (stator, rotor) 1 mm

Electrical

Supply voltage 5V ±5%
Current consumption ~90 mA
Interconnection Cable (standard 250mm)
Communication SSi / BiSS-C
Output code Binary
Serial output Differential RS-422
Clock frequency 0.1- 5.0 MHz
Position update rate 35 kHz (Optional - up to 375 kHz)

Environmental

EMC IEC 6100-6-2, IEC 6100-6-4
Operating temperature range -40°C to +105°C (Optional -55°C to +125°C)
Storage temperature -55°C to +125°C
Relative humidity 98% Non condensing
Shock endurance / functional 100g 6msec saw-tooth per IEC 60068-2-27:2009 40g 11msec saw-tooth per MIL-810G
Vibration functional 7.7grms @ 20 to 2000 Hz per MIL-810G Category 24
Protection Parylene conformal coating: improved low outgassing, reduces Tin Whiskers risk.
Low out-gassing TML < 1%, CVCM < 0.1%
Radiation tested for TID = 30KRAD. SEE 1E11 p/cm²/s protons @200MeV

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OD
- 25 mm (ID - 2.2 mm)
- 59.7 mm (ID - 25 mm)
- 80 mm (ID - 35 mm)
- 100 mm (ID - 48 mm)
- 140 mm (ID - 90 mm)
- 170 mm (ID - 110 mm)
- 247.7 mm (ID - 171.4 mm)
Communication
- BiSS
- SSi
Resolution
- 17 bit
- 18 bit
- 19 bit
- 20 bit
- 21 bit
- 22 bit
- 23 bit
BIT
- Disabled
- Enabled
Shaft-turn Counter
- 2,048
- 4,096
- 8,192
- 16,384
- 32,768
- None
Cable Type
- Jacket and shielded cable
- Shielded cable
- Wires only
- ESA Space Cable
Cable Length
- 250 mm Flying leads - 28AWG
- 500 mm Flying leads - 28AWG
- 750 mm Flying leads - 28AWG
- 1000 mm Flying leads - 28AWG
Rotor Type
- Hollow Shaft Encoder
- End Shaft - Single Screw VL25
- Shaft with Insert
Custom
- High Temperature