The Mitsubishi QD75D2 is a 2-axis pulse output position control module for the Q-series PLC, delivering up to 1 Mpps differential output for high-speed point-to-point and path control. It supports incremental and absolute positioning systems, with control units selectable in mm, inch, degree, or pulse. Positioning data—600 points per axis—and block start data are stored on flash ROM, eliminating the need for a backup battery. This is a practical advantage in panels where battery replacement access is tight.
The 1 Mpps maximum output pulse rate makes it suitable for high-resolution stepper or servo drives where fine positioning at speed is required — think pick-and-place or labeling machines. Acceleration and deceleration can be set independently in four patterns, with trapezoidal or S-curve profiles. The deceleration time range (1 to 8,388,608 ms) gives flexibility for both hard stops and gentle ramp-downs, depending on the load inertia.