The RTA A-CSD 94 is a digital bipolar microstepping driver designed for precise, smooth and low-noise control of stepper motors. It supports 24–48 VDC power supply and adjustable motor current from 2.6 to 4.4 A. The driver provides Step & Direction control and adaptive microstepping up to 3, 200 steps/revolution, making it suitable for CNC machines, automation equipment, positioning systems, packaging machinery and other precision motion-control applications. Its intelligent current-profile management and electronic damping help reduce motor vibration and acoustic noise while maintaining smooth motion. The unit also includes protection against over/under-voltage, motor-output short circuit and overtemperature. Key Features Brand: RTA – Made in Italy Model: A-CSD 94 Product Code: ACSD94 Drive Type: Advanced Step & Direction Motor Type: Bipolar Stepper Motor Supply Voltage: 24–48 VDC Output Current: 2.6–4.4 A Microstepping: 400 / 800 / 1, 600 / 3, 200 steps/revolution Connector: Plug-in connectors Dimensions: approx. 90 × 99 × 21 mm Automatic current reduction at motor standstill Electronic damping for vibration and noise reduction Overtemperature protection Short-circuit protection Over-voltage and under-voltage protection CE and UL recognized