RS2A03A8AA4 by Sanyo Denki

The RS2A03A8AA4 servo amplifier from Sanyo Denki is part of the robust R SANMOTION Servo Drives series, engineered for high-precision industrial automation. This drive delivers a rated output of 100W and supports an amplifier power supply of AC200V to 230V +10/–15% 50/60Hz ±3Hz to ensure stable operation under varying line conditions. It provides a rated speed of 3000 RPM and maintains a rated torque of 0.318 Nm for continuous duty, with a peak torque at stall of 1.18 Nm for dynamic startup and sudden load changes. The drive’s rated armature current of 0.81 Arms and phase resistance of 9.3 Ohms deliver reliable current control, while the holding brake voltage of DC90V/DC24V ±10% supports safe motor locking when stationary. Compact in design, this unit measures 160 × 50 × 130 millimeters and weighs only 0.95 kilograms, making it well-suited for integration into tight enclosures.

Performance is optimized through advanced control interfaces and finely tuned electrical parameters. The amplifier features an analog pulse control interface paired with a pulse encoder input to achieve precise speed, torque, and position control of compatible Sanyo rotary motors. Dynamic response is enhanced by the mechanical time constant (without encoder) of 0.97 ms and the rotor moment of inertia (without encoder) of 0.0627 × 10^-4 kg·m², enabling rapid acceleration and deceleration profiles. The voltage constant per phase of 14.8 mV per RPM ensures accurate motor feedback and consistent torque output across the speed range. Integrated regenerative resistance and dynamic brake resistance circuits manage energy recapture and dissipation during deceleration, reducing thermal stress on the drive. Users can configure multiple units in daisy chain setups via dedicated setup software for synchronized multi-axis motion.

Built for industrial reliability, the RS2A03A8AA4 operates continuously in ambient temperatures from 0 to 40°C, with a maximum surrounding air temperature of 55°C to prevent overheating. The drive employs safe torque off (STO) functionality to inhibit motor torque instantly without cutting main power, meeting stringent safety standards. Flexible mounting options include both front and rear attachment using available metal fittings, and Sanyo Denki recommends maintaining at least 50 millimeters of clearance above and below the unit to preserve unobstructed airflow through the intake and exhaust vents. Ideal applications encompass packaging machinery, semiconductor fabrication equipment, and general-purpose automated production lines where compact size, high responsiveness, and dependable performance are mandatory.