Rotary Encoder
MES-6 Series, External diameter φ7.5mm, Incremental



  • Ultra small, high resolution rotary encoder
  • Outside dimensions φ7.5 x 10.5
  • High resolution, 100 to 500 pulses/revolution
  • Incremental
  • A, B, and Z output phases, open collector output


Ordering Code



Item Rating
Supply voltage 5 VDC ±10%
Consumption current 30 mA or less (under no load)
Detection system Incremental
Resolution (pulses/revolution) 100, 120, 200,  300, 360,  500
Output phases Phases A, B, and Z
Output phase difference A, B phase difference 90°
±45° (T/4 ±T/8)
Z phase T ±T/2 (see Output Waveform)
Output form Square wave, open collector output
Output capacity Sink current: 4 mA (output voltage resistance 7V)
Residual voltage: 0.4V or less
Maximum response frequency 100kHz
Waveform rise/fall time 2μs or less (output cable 300 mm or less)
Starting torque 0.3 x 10-3N・m(3 gf・cm)or less
Allowable load of shaft
Radial 1.9 N (200 gf)
Thrust 0.98 N (100 gf)
Maximum allowable number of revolutions (mechanical) 6000 r/min
Operating ambient temperature/humidity 0℃ to 60℃
RH 35% to 90% no dewing
Storage ambient temperature -20℃ to 80℃
Vibration resistance Durability 55 Hz, double amplitude 1.5 mm
2 hours each in X, Y, and Z directions
Impact resistance Durability 500 m/s2 (about 50G)
3 times each in X, Y, and Z directions
Cable Vinyl wire (AWG32)
Cable length 300 mm
Mass 5 g


Outside dimensions



Output circuit diagram



Output waveform