Mitsubishi Electric FR-A840-0.4K-1 FR-A800 Series Variable Frequency Drive

Description

Designed for precise speed and torque control in demanding industrial environments, the FR-A840-0.4K-1 represents the premium three-phase variable frequency drive (VFD) class within the Mitsubishi Electric FR-A800 family. This drive is engineered to deliver high-performance vector control and outstanding real-time speed response for both standard induction motors and permanent magnet motors.

Operating on a three-phase input supply of 380V to 500V, this compact unit provides a rated output of 0.4 kW. Built-in serial communication protocols, including RS-485, RS-422, and RS-232, facilitate direct integration into factory automation systems, PLCs, and distributed control networks without requiring additional interface cards.

Features

• Advanced magnetic flux vector control for precise speed regulation and high starting torque.
• Auto-tuning capabilities for both induction motors (IM) and permanent magnet (PM) motors.
• Integrated RS-485, RS-422, and RS-232 communication interfaces for flexible system integration.
• Inherent energy-saving control algorithms that optimize excitation current based on motor load.
• Comprehensive protective functions including overcurrent, overvoltage, undervoltage, and thermal overload tracking.

Applications

• Material handling systems, conveyors, and sorting lines.
• Water and wastewater pumps, industrial fans, and blowers.
• Extruders, mixers, and industrial processing machinery.
• Gantry cranes, hoist mechanisms, and high-precision positioning systems.

Technical Specifications

Installation Guidelines

To ensure optimal heat dissipation and reliable operation, observe the following engineering instructions:

• Mounting Position: Install the drive vertically on a flat, non-flammable surface such as a metal panel.
• Clearances: Maintain a minimum clearance of 50 mm above and below the drive unit, and at least 10 mm on both sides for adequate airflow.
• Wiring: Always connect the AC power source to the input terminals (R/L1, S/L2, T/L3) and the motor leads to the output terminals (U, V, W). Never connect AC power directly to the output terminals as this will cause catastrophic damage.
• Grounding: Use a dedicated ground terminal with low electrical resistance to prevent electrical noise and ensure personnel safety.

Compliance and Certifications

• CE Marked
• UL Listed
• cUL Listed
• RoHS Compliant (6)