Miniature Encoders for High Accuracy and Motion Control

DS-25

The Netzer DS-25 Absolute Rotary Encoder builds on Netzer’s industry-leading technology, delivering 21-bit resolution and 0.01-degree accuracy in a lightweight and compact design. This contactless encoder provides wear-free, long-term operation for high-end industrial, aerospace, and robotic applications. Its hollow, low-mass structure enhances system dynamics while reducing overall weight, making it perfect for applications that demand uncompromising precision and reliability.

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Features

Compact, lightweight design for minimal system impact
High precision rotary feedback with exceptional repeatability
Low power consumption for efficient energy usage
Excellent resistance to EMI and magnetic interference
Designed for extended service life and minimal maintenance

Unique Values

Small Size
High precision
Light weigth
Repeatability

OD

25 mm
ID

6 mm
Height

7 mm
Weight

10 gr
Resolution

17-21 bit
Accuracy

±0.010˚

Technical Data

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General

Angular resolution 17-21 bit
Nominal position accuracy ±0.020°
Nominal position extended accuracy (EA) ±0.010°
Repeatability 2.7 mdeg / 9.9 Arcsec
Maximum operational speed 4,000 rpm
Measurement range Single Turn Absolute with optional shaft turn counter
Build 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 ±0.1 mm
Rotor inertia 11 gr · mm²
Total weight 10 gr
Outer Ø /Inner Ø / Height 25 / 6 / 7 mm
Material (stator / rotor) Ultem™ polymer / TRVX-50

Electrical

Supply voltage 5V ±5%
Current consumption ~90 mA
Interconnection #30 shielded cable
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 -40°C to +85°C
Storage temperature -50°C to +85°C
Relative humidity 98% Non condensing
Shock endurance / functional 100 g for 11 ms / 40g 11ms (per MIL-STD-810G)
Vibration functional 20 g 10 – 2000 Hz (per MIL-STD-810G)
Protection IP 40

Miniature Encoders using absolute rotary encoder technology

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OD
- 16 mm (ID - 4 mm)
- 25 mm (ID - 6 mm)
- 37 mm (ID - 10 mm)
- 40 mm (ID - 10 mm)
- 58 mm (ID - 20 mm)
- 70 mm (ID - 30 mm)
- 90 mm (ID - 50 mm)
- 130 mm (ID - 90 mm)
Communication
- BiSS
- SSi
Resolution
- 16 bit
- 17 bit
- 18 bit
- 19 bit
- 20 bit
- 21 bit
- 22 bit
- 23 bit
BIT
- Disabled
- Enabled
Cable Type
- Jacket and shielded cable
- Shielded cable
- Wires only
Cable Length
- 250 mm Flying leads - 30AWG
- 500 mm Flying leads - 30AWG
- 750 mm Flying leads - 30AWG
- 1000 mm Flying leads - 30AWG
- 250 mm Flying leads - 28AWG
- 500 mm Flying leads - 28AWG
- 750 mm Flying leads - 28AWG
- 1000 mm Flying leads - 28AWG
Extended Accuracy
- Enabled
- Disabled