Fuji RYE.75D AC Drive for Three‑Phase Motors

The Fuji RYE.75D is a compact AC drive (also referred to as a PLC driver or inverter) designed for variable speed control of three‑phase induction motors. Rated at 0.75 kW (1 HP), it accepts 200‑240 V AC single‑phase or three‑phase input and delivers a three‑phase output to the motor. The drive offers standard V/f control, simple parameterization, and built‑in protection features. It is suitable for small industrial applications such as fans, pumps, conveyors, and small machine tools. The RYE series is known for its reliability, compact size, and ease of integration with PLC systems via analog or digital inputs.

Technical Specifications

Input voltage: 200‑240 V AC ±10%, 50/60 Hz (single‑phase or three‑phase). Motor power: 0.75 kW. Output current: 4.2 A (three‑phase). Output frequency: 0.1‑400 Hz. Control method: V/f control, carrier frequency adjustable 2‑10 kHz. Analog input: 0‑10 V, 4‑20 mA. Digital inputs: 4 (start, stop, reverse, multi‑speed). Relay outputs: 1 (fault). Protection: overcurrent, overvoltage, undervoltage, overload, overtemperature. Cooling: natural convection (fanless). Dimensions: 108 mm (H) × 68 mm (W) × 128 mm (D). Weight: 0.7 kg. Operating temperature: -10°C to 50°C. Storage: -20°C to 65°C. Protection: IP20. Standards: CE, RoHS.

Key Features

• 0.75 kW power output for small motors

• V/f control with automatic torque boost

• Compact, space‑saving design

• Single‑phase or three‑phase input (200‑240 V)

• Simple parameter setting via potentiometer or digital keypad

• Built‑in PID controller for closed‑loop applications

• Multi‑speed operation (up to 8 speeds via digital inputs)

• Fault output relay for external monitoring

Operation and Control

The RYE.75D can be controlled directly from a PLC via analog (0‑10 V) or digital signals. For simple speed control, connect a 0‑10 V signal to the analog input. For fixed speeds, use the multi‑speed function with digital inputs. The drive includes a built‑in PID controller for applications such as constant pressure or flow. Acceleration and deceleration times are independently adjustable. The LED display shows output frequency, current, or fault codes.

Applications

Typical applications include small fans and blowers, water circulation pumps, conveyor drives in packaging lines, agitators, and spindle drives for small machine tools. The drive is often used as an actuator for a PLC’s analog output, hence the “PLC driver” designation.

Installation and Wiring

Mount the drive on a DIN rail or panel. Connect input power to L1, L2 (L3 for three‑phase) terminals. Connect motor to U, V, W terminals. Connect control signals: analog input (AI, GND), digital inputs (FWD, REV, etc.). Use shielded cables for analog signals. Set parameters using the keypad: motor current, acceleration time, frequency source, etc. After wiring, test the drive at low speed before full operation.

Maintenance and Diagnostics

The drive has LED indicators for power and fault. If the fault LED lights, check for overload, short circuit, or input voltage. The drive is maintenance‑free; keep the ventilation slots clean. No user‑serviceable parts inside.

Conclusion

The Fuji RYE.75D AC drive offers a cost‑effective solution for variable speed control of small three‑phase motors in industrial automation. Its compact size, simple operation, and compatibility with PLC control make it suitable for OEM and retrofit applications.