PRS-1972B
by Sanyo Denki
The Sanyo Denki PRS-1972B is a robust servo amplifier from the PRS Servo Drive Boards series, designed to meet the demands of modern industrial automation. This unit supports single-phase or three-phase AC inputs operating at 200–240 VAC and delivers a continuous 15 A capacity to drive high-performance servomotors. It incorporates an IGBT-based sinusoidal PWM control system to ensure smooth torque delivery and minimal acoustic noise. Built into a stainless steel housing, the PRS-1972B provides exceptional durability and corrosion resistance in harsh factory environments. Engineered for precision, this amplifier is a key component in multi-axis systems requiring consistent, repeatable motion control.
Featuring advanced control technology, the PRS-1972B integrates pre-installed regenerative resistors to recover braking energy and improve overall efficiency. Its support for optical incremental encoders allows for feedback at 1000 or 2500 pulses per revolution, enabling fine resolution and accurate position tracking. The built-in encoder signal filtering function optimizes noise immunity and ensures stable closed-loop performance. With a front-end capable of accepting single- or three-phase 200–240 VAC, the amplifier maintains a high power factor and reduces harmonics on the supply network. Additional surge and overcurrent protection circuits safeguard both amplifier and motor against electrical faults.
Operationally, the PRS-1972B excels under demanding conditions. It remains fully functional at ambient temperatures between 0 °C and +55 °C and can be stored safely from –20 °C to +65 °C without degradation. The design tolerates relative humidity up to 90% RH (non-condensing) and is rated for reliable operation up to 1000 m elevation, accommodating diverse installation sites. Mechanical resilience is assured with vibration resistance of 4.9 m/s² and shock resistance of 19.6 m/s², making it ideal for mobile platforms or heavy machinery. Clear front-panel indicator lights provide real-time status monitoring, simplifying troubleshooting and preventive maintenance.
Integration into control architectures is straightforward: the PRS-1972B fits on DIN rails or custom brackets, matching standard rack layouts for multi-axis systems. Its compatible interface supports industry-standard encoder signals and drive bus communications, facilitating seamless connection with PLCs and motion controllers. Applications span CNC machinery, robotic arms, packaging lines, and textile equipment where precise velocity and torque control are critical. By combining energy recovery, high-resolution feedback, and rugged construction, the PRS-1972B stands as a versatile and reliable choice for complex automation projects.
