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About QR200

Quantum Devices, Inc. Model QR200 Incremental Rotary Encoder provides an improved rotary encoder feedback solution in applications typically using modular encoders. With an overall length of 0.93” and the stability of a bearing encoder design, the model QR200 Incremental Rotary Encoder can provide significant performance upgrades in applications limited by traditional modular encoder solutions. Outputs consist of a quadrature with reference pulse and three-phase commutation, which can be configured with either the industrial standard 5 volt RS-422A Line Driver or the 5 to 26 volt OL7272 line driver. A flexible spring mount allows for much greater tail shaft run out than can be tolerated by modular encoder designs, plus it provides 30 degrees of rotation for commutation timing. A housing constructed of conductive carbon fiber composite provides the EMI shielding of an all metal housing and the performance of a lightweight robust assembly.

QR200 Incremental Rotary Encoder Design Features:

  • 500 kHz fundamental frequency response
  • Low Profile, 0.93″ assembled height
  • Bearing design simplifies encoder attachment
  • Up to 10,000 lines per revolution, 40,000 post quad
  • 4, 6 or 8 pole commutation
  • Conductive carbon fiber housing
  • 1.812″, 2.375″ bolt circle or size 21 resolver mounting
  • Through shaft sizes up to 0.625″ diameter
  • High noise immunity
  • RoHS Construction

Note: prior to transitioning to RoHS-compliant, the product name was QD200 rather than QR200. Therefore, when cross-referencing a QD200 configuration, simply substitute the configuration prefix with QR200.


QR200 Optical Encoder Electrical Specifications

Input Voltage 5 VDC ±5% or 5-26 VDC
Input Current Requirements 125mA max. plus interface loads
Input Ripple 2% peak to peak @ 5 VDC
Output Circuits AM26LS31 RS-422A line driver
OL7272 high voltage line driver
TTL output
Incremental Output Format Quadrature with A leading B for CW rotation with index pulse centered over A for 2500 line count and below. Index pulse true over A and B high for 2500 line count and above.
Frequency Response 500 kHz
Symmetry 180 degrees ±10% typical
Minimum Edge Separation 54 electrical degrees max
Commutation Format Three phase 4, 6 or 8 poles
Commutation Accuracy ±1° mechanical

QR200 Optical Encoder Environmental Specifications

Storage Temperature -40 to 125°C
Operating Temperature -20 to 100°C typical
-20 to 120°C optional
Humidity 98% Non-condensing
Vibration 20 g's @ 50 to 500 CPS
Shock 50 g's @ 11 mS duration

QR200 Optical Encoder Mechanical Specifications

Maximum Shaft Speed 8000 RPM
Bore Diameter (Tolerance) 0.375", 0.4375", 0.500", 0.625", 8mm, 12mm, 14mm (-0.0000, + 0.0005)
Allowable Shaft Runout 0.007" TIR
Axial Shaft Movement ±0.030"
Housing Carbon fiber composite (case ground via cable)
Housing Volume Resistivity 10⁻² ohm-cm
Termination 15 conductor cable, 28 AWG 18" long, 9 conductor cable for non-commutated and TTL outputs
Mounting 1.812", 2.375" bolt circle or size 21 resolver
Moment of Inertia vs. Shaft Diameter Ø0.375" (6.5 x 10⁻⁴ oz-in-s²)
Ø0.500" (6.0 x 10⁻⁴ oz-in-s²)
Ø0.625" (5.1 x 10⁻⁴ oz-in-s²)
Acceleration 1x10⁵ radians per second²
Accuracy ± 1.0 arc minute
Info & Pricing

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