Product Description

Model Number Interpretation

• 20: 20 horsepower rating (460VAC input).

• F: FlexPak 3000 series, digital DC drive.

• R: Regenerative (four‑quadrant operation, energy Feed back to the power grid).

• 4: 460VAC three‑phase input (414–506VAC).

• 042: Standard control variant, 50/60Hz operation.

Technical Specifications

• Rated Power: 20HP / 15kW (460VAC input).

• Input Voltage: 414–506VAC (460V nominal), three‑phase, 50/60Hz.

• Input Current: 32A (RMS, full load).

• Output Voltage: 0–500VDC (armature), 0–300VDC (field).

• Output Current: 34A (DC armature, continuous), 15A (DC field).

• Enclosure: NEMA 1 (IP20), compact panel‑mount design.

• Ambient Temperature: 0–55°C (operating).

• Control Modes: Speed, jog speed, torque (closed‑loop with encoder).

• Features: Digital PWM, adjustable acceleration/deceleration, line regeneration, full protection (OV/UV/OC/OL/OT).

Interface and Communication Configuration

• Power Terminals: L1/L2/L3 (AC input), A+/A‑ (DC armature), F+/F‑ (DC field).

• Control Terminals: 8 digital inputs (start/stop, forward/reverse, fault reset, etc.), 2 relay outputs (fault/status), 2 analog inputs (4–20mA / 0–10Vdc), 2 analog outputs (0–10Vdc).

• Communication: Onboard RS‑232 for programming; optional DeviceNet/Profibus modules.

• Front Panel: LED display, keypad for local programming and monitoring.

Core Functions

• Four‑Quadrant Control: Regenerative braking returns energy to the AC line, improving efficiency.

• Precision Speed/Torque Control: Closed‑loop encoder feedback for accurate regulation.

• Adaptive PWM: Smooth motor operation, low noise, high efficiency.

• Comprehensive Protection: Safeguards drive and motor from electrical/thermal faults.

• Compact Design: Saves panel space in industrial control cabinets.

Application Scenarios

Usage and Maintenance Instructions

• Mount vertically on a rigid, cool, dry surface with adequate ventilation; avoid direct sunlight and moisture.

• Use shielded cables for control signals to reduce electrical noise.

• Monitor operating temperature, current, and vibration regularly; keep ambient temperature within 0–55°C.

• Periodically inspect terminals for tightness, corrosion, or overheating.

• Keep cooling passages clean and free of dust.

• Troubleshoot all fault alarms before restarting; do not disassemble without professional guidance.