PSR2405A is a 2-phase open-loop spontaneous pulse driver with 32-bit DSP control, providing stable, low-vibration performance. It supports analog speed regulation, 16-speed current settings, smooth and precise current control, and opto-isolated differential inputs. Drive current adjustable below 4.8 A; voltage DC20–50 V. Size: 118×76×33 mm, weight 0.3 kg. Suitable for 42–60 mm (NEMA17–24) stepper motors.