Mitsubishi Electric FR-A840-00310-2-60 FR-A800 Variable Frequency Drive Inverter

Description

Delivering exceptional motor control and energy efficiency in high-demand environments, the Mitsubishi Electric FR-A840-00310-2-60 is a three-phase, 400V class variable frequency drive engineered for the FR-A800 Series control platform. Featuring advanced vector control algorithms and a robust IP20 protective structure, this inverter is designed to drive induction and permanent magnet motors with high precision. This specific model features factory-applied conformal circuit board coating (suffix -60) to protect internal electronics against dust, humidity, and corrosive atmospheric contaminants, making it highly reliable for heavy industrial environments.

Features

• Conformal PCB Coating (-60): Standard circuit boards are coated to guard against harsh environmental ingress, extending operational life in demanding conditions.
• Real Sensorless Vector Control: Achieves high torque at zero speed and precise speed control without requiring physical encoder feedback.
• Dual Overload Ratings: Supports Super Light Duty (SLD) and standard duty cycles to optimize performance and sizing across different load profiles.
• Built-in Safety Function: Features integrated dual-channel safety emergency stop inputs (SIL2/PLd) to simplify compliance with machinery safety directives.
• Energy Optimization: Dynamic auto-tuning and energy-saving algorithms significantly reduce power consumption under variable load conditions.

Applications

• Centrifugal Pumps and Fans: Ideal for variable torque municipal water systems, cooling towers, and industrial ventilation.
• Material Handling: Provides smooth acceleration and deceleration curves for industrial conveyors, hoists, and positioning tables.
• Extruders and Mixers: High starting torque capabilities handle heavy-duty startup loads easily.
• Machine Tool Spindles: High-speed precision control suited for metalworking and wood-processing machinery.

Technical Specifications Table

Connections and Interfaces

Empirical Engineering Insights

Alternative Models & Compatibility

The FR-A840-00310-2-60 belongs to the premium FR-A800 generation, directly succeeding older FR-A740 models. Parameter migration can be executed smoothly using the FR Configurator2 software tool. Note that because of changes in footprint dimensions and terminal spacing between generation series, physical cabinet layout verification is required when retrofitting existing backplates.

Application Pitfalls & Engineering Notes

When utilizing the drive in its Super Light Duty (SLD) rating of 31.0A for centrifugal loads, the permissible ambient temperature drops to 40 degC without derating. If the drive is integrated inside a tightly sealed NEMA/IP cabinet where temperatures can reach 50 degC, you must calculate thermal dissipation carefully or utilize the standard Light Duty (LD) or Normal Duty (ND) current curves to avoid overtemperature trip alarms (such as E.THT).

Commissioning & Wiring Tips

To prevent common EMC interference issues with nearby instrumentation, ensure motor cables are shielded and terminated with low-impedance earthing clamps at both the drive ground plate and the motor terminal box. Always keep the safety bypass jumpers intact across S1-PC and S2-PC if safety circuits are not connected; removing these jumpers without a dedicated safety relay will trigger an immediate E.SAF fault, halting the drive operation.

Installation Guidelines