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MDB20-20mm modular board type rotary encoder

Product Description:

MDB20 magnetic rotary encoder module has a precision sensor having an integrated Hall element for scanning a permanent Dipole magnet. The Sensor itself generates a constant amplitude Sine and Cosine voltages that is used for angle calculations. These Sine and Cosine signals are further interpolated to get the Incremental or Absolute signals with resolutions up to 14 bits per rotation.
MDB20 module is a 20mm PCB assembly which can be used in any small designs with ease of installation.

Salient Features:

  • 20mm Circular PCB assembly module.
  • Operates on 5V power supply.
  • Variety of outputs supported like Analog Sin-Cos output, Incremental RS422, Absolute SSI and BiSS-C protocol.
  • Supports up to 14 bits (16384 positions) per rotation- Absolute and Incremental output.
  • Accuracy +/- 0.5°.
  • High Speed operation up to 20000 rpm at finest resolution.
  • 3600 CPR also available to give angular resolutions easier for mathematical calculations.



  • Packaging Machines
  • Automation
  • Paper and Textile industry
  • Defence Projects
  • Medical Engineering
  • Renewable Energy
  • Robotics
  • Special Purpose Machines
  • Motor Drive Technology
  • elevator technology
  • Automotive Industry
  • And many more...

Mechanical drawings :


MDB20 mgnt


Specifications Details
Power Supply +5V DC (±5%)
Current consumption 50mA to 90mA
Output Depends on the model
(See datasheet)
Maximum RPM 20000 to 120000 RPM
Operating Temperature -40oC to +125oC
Storage Temperature -40oC to +125oC
Accuracy ±0.5o

Available models:

MDB20AS - Analog single ended Sine Cosine output with a single sine-cosine cycle per rotation.
MDB20AC - Analog complementary Sine Cosine output with a single sine-cosine cycle per rotation.
MDB20IR - Incremental RS422 A, B and Z output with up to 16384 counts per rotation (CPR).
MDB20SB - Absolute output on Synchronous Serial interface (SSI) with Binary data up to 13 Bits per rotation.
MDB20SG -Absolute output on Synchronous Serial interface (SSI) with Grey coded data up to 13 Bits per rotation.
MDB20BC - Absolute output on BiSS-C data up to 14 Bits per rotation.

Ordering Codes:

We also make customised encoders.
Please contact our sales representative for standard as well as any customised encoders.
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