High Resolution Rotary Encoder for Precision Control by Netzer

DS-40

The Netzer DS-40 Absolute Rotary Encoder is designed to meet the stringent demands of industrial automation, robotics, and aerospace systems. Featuring 21-bit resolution and an accuracy of 0.01 degrees, this encoder provides wear-free, contactless operation, ensuring long-term stability. Its lightweight, hollow-core design minimizes inertia and maximizes efficiency, making it an essential component for systems that require both high precision and durability.

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Features

21-bit resolution for exceptional precision
EMI, RFI, and magnetic field-resistant design
Contactless capacitive sensing for wear-free durability
Hollow shaft structure for seamless system integration
Optimized for compact, space-efficient applications

Unique Values

Immunity to Magnetic
Durability
MTBF 15
Repeatability

OD

40 mm
ID

10 mm
Height

10 mm
Weight

20 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 70.93 gr · mm²
Total weight 20 gr (with 250 mm cable)
Outer Ø /Inner Ø/ Height 40 / 10 / 10 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 6 ms
Vibration functional 20 g 10 – 2000 Hz (per MIL-STD-810G)
Protection IP 40

High Resolution Rotary Encoder 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