3-Channel encoder and codewheel, 23.36mm Optical Radius bundled pack

Currently Viewing:

The HEDB-9040 series are three channel optical incremental encoder modules offered with a codewheel. When used with a codewheel, these low cost modules detect rotary position. Each module consists of a lensed LED source and a detector IC enclosed in a small plastic package. Due to a highly collimated light source and a unique photodetector array, these modules are extremely tolerant to mounting misalignment.

The HEDB-9040 has two channel quadrature outputs plus a third channel index output. This index output is a 90 electrical degree high true index pulse which is generated once for each full rotation of the codewheel. The HEDB-9040 is designed for use with a HEDS-6140 codewheel which has an optical radius of 23.36 mm (0.920 inch). The quadrature signals and the index pulse are accessed through five 0.025 inch square pins located on 0.1 inch (pitch) centers.


  • Two Channel Quadrature Output with Index Pulse
  • Resolution from 100 CPR up to 1024 CPR (Counts Per Revolution)
  • Low Cost
  • Easy to Mount
  • No Signal Adjustment required
  • Small Size
  • Operating Temperature : -40oC to 100oC
  • TTL Compatible
  • Single 5V Supply


  • Printers
  • Plotters
  • Tape Drives
  • Industrial and Factory Automation Equipment

Lifecycle Status


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Distrib. Inventory Yes
RoHS6 Compliant Y
Lead Orientation Straight
Line Driver N
Frequency 100.0
Motion Type Rotary
Resolution 1024 CPR
Optical Method Transmissive
Optical Radius (mm) 23.36
Terminations Pins For Connector
Obsolescence Notice2 i