30mm Diameter Optical Encoder Modular

HKT30-A01 overall

The HKT30-A01 series are high performance, low cost, two and three channel optical incremental encoders. These encoders emphasize high reliability, high resolution, and easy assembly. Each encoders contains a LED source (emitter), an integrated circuit with detectors and circuitry, and a code-wheel which rotates between the emitter and detector integrated circuit. These encoders may be quickly and easily mounted to a motor. The quadrature signals and the index pulse are accessed through four 0.025 inch square pins located on 0.1 inch centers.


Small size, low cost, -40 C to 100 C operating temperature, easy assembly, no signal adjustment necessary, resolutions up to 1024 counts per revolution, TTL compatible.


The HKT30-A01 series provide motion detection at a low cost, making them ideal for high volume applications. Typical applications include printers, plotters, tape drives, positioning tables, and automatic handlers.

Output Waveform

90 Output phase difference, CW rotation

(CW rotation as seen from fit surface)

ISN4005 rotation (4)

Square-wave accuracy: X1 + X2 = 1/2T 1/12T, X3 + X4 = 1/2T 1/12T

Pitch error of period: 0.01T

Pitch error of phase position: 1/18T

Z Phase: Tz=1/4T (1T,1/2T,1/4T…)

Period of pulses: T=360 /N (N: output pulses)

Signal accuracy: Xn=1/4T 1/12T (n=1,2,3,4)

A leads B clockwise when viewing the encoder shaft end.

The position of Z shaft against A,B phase is not specified.

Technical Specifications

Electrical specifications
Output wave Square wave
Output signals A,B, phase
Current consumption 25mA
Output current 0~5mA
Response frequency 0~100KHz (Voltage output) 0~50KHz(Line driver output)
Output phase difference 90 45
Supply voltage 5V DC
Signal level VH 85% Vcc, VL 0.3V
Number of pulses 100,200,256,360,400,500,1000,1024 (other number of pulse available on request)
Output circuit Voltage, Line driver
Mechanical Specifications
Rotor inertiaof code-wheel Appr. 6.0×10-8 Kgm2
Hollow shaft diameter 8mm
Shock resistance 980m/s2, 6ms, 2 hours each on XYZ
Vibration proof 50m/s2, 10~200Hz, 2 hours each on XYZ
Working life MTBF 50000h (+25 C, 2000rpm)
Weight Appr. 10g (with 0.5 meter cable)
Environmental Specifications
Working humidity 30~85% (no condensation)
Storage temperature -40 C~100 C
Working temperature -25 C~85 C
Weld temperature 260 C
Protection class IP50

Terminal Assignment

Color code 1 2 3 4 5 6
Cable Color Black Red Green Brown Grey White
Line driver output 0V Vcc SIG A SIG A SIG B SIG B
Cable code 1 2 3 4 5
Cable color Black Yellow Green Red White
Voltage output 0V SIG Z Vcc SIG B N.C

Ordering Code

HKT30 04 Y A01 G 1024 B 5 E
Series Hollow shaft diameter Encoder module Sequence number Connection Number of pulese Output signals Supply voltage Output circuit

Selection Guide (2)


HKT30-A01 dimensions

Motors described above are typical and can be customized upon request.

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