Products
MELSECQ Series
Highspeed counter, Pulse input
A selection of highspeed counter modules and pulse counter module for accuracy intensive, high resolution control applications is available
Pulse input modules capable of highspeed counting
 Highspeed counter module Standard type
 QD62
 QD62E
 QD62D
 Highspeed counter module
Multichannel highspeed counter module
 QD63P6
 Highspeed counter module
4 Mpps compatible highspeed counter module
 QD64D2
 Highspeed counter module
Multifunction counter/timer module
 QD65PD2
Inputs may be connected to a variety of devices for positioning control, precision measurement, etc. The maximum counting speed may be adjusted via parameter (excluding QD64D2) for more reliable counting at lower frequencies.
 External coincidence output (QD64D2 includes 2 per channel): Select coincidence output, continuous comparison (QD64D2 only), or the coincidence detection interrupt function for flexible highspeed external device control.
 Many functions are available to satisfy application requirements including the coincidence output test function (QD64D2 only), latch counter function (excluding QD63P6), and preset function.
 Calculate pulses at speeds up to 8 Mpps (4 multiples of 2 phases). Perform precise position tracking using a highresolution encoder for demanding applications such as semiconductor and LCD manufacturing. (QD65PD2)
Model  QD62 (DC input sinking output type) 
QD62E (DC input sourcing output type) 
QD62D (differential input sinking output type) 


Number of channels  2 channels  
Count input signal  Phase  1phase input, 2phase input, CW/CCW  
Signal level  5/12/24 V DC 2...5 mA  EIA Standard RS422A Differential line driver level (AM26LS31 [manufactured by Texas Instruments] or equivalent)  
Pulse input  1phase pulse input (x1, x2), CW/CCW, 2phase (x1, x2, x4)  
Counting speed (max.)  200 kpps  500 kpps  
Function  ·Linear counter function ·Ring counter function ·Coincidence output function ·Preset function ·Latch counter function ·Count disable function ·Sampling counter function ·Periodic pulse counter function 
Model  QD63P6 (DC input) 
QD64D2 (DC input sinking output type) 
QD65PD2 (DC/Differential input, external output terminals) 


Number of channels  6 channels  2 channels  2 channels  
Count input signal  Phase  1phase input, 2phase input, CW/CCW  
Signal level  5 V DC 6.4...11.5 mA  EIA Standard RS422A, differential line driver level (AM26LS31 (manufactured by Texas Instruments Incorporated) or equivalent)  [Differential input] EIA Standards RS422A, differential line driver level (AM26LS31 [manufactured by Texas Instruments] or equivalent) [DC input] 5/12/24 V DC, 7...10 mA 

Pulse input  1phase pulse input (x1, x2), CW/CCW, 2phase (x1, x2, x4)  
Counting speed (max.)  200 kpps  4 Mpps  [Differential input]···8 Mpps [DC input]···200 kpps 

Function  ·Linear counter function ·Ring counter function ·Coincidence detection function ·Preset function ·Periodic pulse counter function 
·Linear counter function ·Ring counter function ·Coincidence detection function ·Continuous comparison function ·Preset function ·Latch counter function 
·Linear counter function ·Ring counter function ·Coincidence output function ·Cam switch function ·Preset/replace function ·Latch counter function ·Count disable function ·Sampling counter function ·Periodic pulse counter function ·Count disable/preset/replace function ·Latch counter/preset/replace function ·Internal clock function ·Frequency measurement function ·Rotation speed measurement function ·Pulse measurement function ·PWM output function ·General input function ·General output function 
Multifunction counter/timer module (QD65PD2)
 Perform extremely accurate position tracking
Counting speed up to 8 Mpps (4 multiples of 2 phases)
 Multiple functions designed for ease of use
Pulse measurement function
With a resolution of 100 ns, it is possible to perform highly accurate pulse measurement.
PWM output function
Precisely control PWM output up to 200 kHz. With a resolution of 0.1 µs, superfine control of the duty cycle is possible.
Cam switch function
Configure up to 16 cam settings and use up to 8 dedicated outputs. The cam switch function enables highly accurate timing control.
 Perform sophisticated control using coincidence detection
The coincidence output function allows complex applications to be supported. Depending on the situation, either the cam switch function or the coincidence output function can be used.
Channel isolated pulse input
 Channel isolated pulse input module
 QD60P8G
This module is appropriate for the measurement of input pulse counts (related to speed, revolution, instantaneous flow rate, etc.) and the measurement of quantities (length, cumulative flow, and so forth). The QD60P8G operates on a 10 ms control cycle, thus the minimum value refresh time is 10 ms. The count cycle setting can be changed to the desired time for cumulative count values and moving average pulse counts (sampling pulse counts).
Model  QD60P8G  

Number of channels  8 channels  
Count input signal  Phase  1phase input 
Signal level  5 V DC/12...24 V DC, ≥ 4 mA  
Pulse input  1phase pulse input  
Counting speed (max.)  30 k/10 k/1 k/100/50/10/1/0.1 pps 
Lineup
Number of channels  Maximum counting speed  Channel isolated  Input specifications  

5 V DC  12 V DC  24 V DC  Differential drive output  
2  2phase input  200 kpps    QD62 QD62E QD65PD2 
  
500 kpps        QD62D  
4 Mpps        QD64D2  
8 Mpps        QD65PD2  
6  2phase input  200 kpps    QD63P6       
8  1phase input  30 kpps  ●  QD60P8G   