Mitsubishi Electric FR-A840-00250-2-60 FR-A800 Series Variable Frequency Drive

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Hersteller: Mitsubishi Electric
Produkt-Nr.: FR-A840-00250-2-60
Herkunftsland:Vereinigte Staaten
Produkttyp: Variable Frequency Drives
Zahlung: T/T, Western Union
Gewicht: 9000g
Versandhafen: Xiamen
Garantie: 12 Monate

Description

Engineered for high-demand industrial speed and torque applications, the Mitsubishi Electric FR-A840-00250-2-60 is a premium FR-A800 Series variable frequency drive operating in the 400V voltage class. This standard-model inverter features specialized circuit board protective coating compliant with 3C2 specifications (without plated conductors) to ensure long-term reliability in corrosive, humid, or dusty environments. It supports advanced vector control methods to deliver precise motor dynamics for heavy-duty applications like cranes, extruders, and ventilation systems.

Key Features

Conformal PCB Coating: Engineered with standard 3C2-rated circuit board coating to withstand high moisture, chemical exposure, and particulate accumulation.
Advanced Vector Control: Supports real sensorless vector control and closed-loop vector control for absolute torque precision down to zero speed.
Dual Rating Capability: Optimizes sizing by allowing selection between Super Light Duty (SLD), Light Duty (LD), Normal Duty (ND), and Heavy Duty (HD) profiles.
Built-in PLC Functionality: Program internal logic using Mitsubishi Electric developer software to manage local I/O without an external controller.
Comprehensive Safety: Integrated safe torque off (STO) safety terminals comply with SIL 2 / PL d standards.

Applications

Material Handling: Dynamic hoist control, crane gantry synchronization, and heavy-duty conveyor systems requiring high starting torque.
Process Pumps & Compressors: Variable flow management under fluctuating load profiles in chemical processing and water treatment facilities.
Extruders and Mixers: High-inertia load management with precise speed holding under varying material viscosity.
Metalworking and Tensioning: Precise torque limitation and winding/unwinding control loops.

Technical Specifications

Parameter	Specification
Manufacturer	Mitsubishi Electric
Model Code	FR-A840-00250-2-60
Series	FR-A800
Voltage Class	400 V Class (3-phase 380 to 500 V AC, 50Hz/60Hz)
SLD Rated Current	25.0 A
Control Method	V/F Control, Advanced Magnetic Flux Vector, Real Sensorless Vector
PCB Coating Type	Conformally Coated (Class 3C2), without plated conductor (-60)
Enclosure Rating	IP20 (Open Type)
Operating Temperature	-10 degC to 50 degC (non-freezing)
Device Net Weight	6.7 kg
Shipping Weight (Calculated)	9.0 kg

Control Terminals & Wiring Assignments

Terminal Symbol	Terminal Name	Functional Description
STF	Forward Rotation Start	Turn ON STF to start forward rotation; turn OFF to decelerate and stop.
STR	Reverse Rotation Start	Turn ON STR to start reverse rotation; turn OFF to decelerate and stop.
SD	Contact Input Common	Common terminal for contact input signals (sink logic standard).
10	Frequency Setting Power Supply	DC 10V output for analog speed reference potentiometers.
2	Frequency Setting (Voltage)	DC 0 to 5V or 0 to 10V analog speed command input.
4	Frequency Setting (Current)	4 to 20 mA DC analog speed command input.

Empirical Engineering Insights

Alternative Models & Compatibility

The FR-A840-00250-2-60 is directly backward compatible with older FR-A740-00250-EC installations. Users migrating to the FR-A800 series must utilize FR Configurator2 to convert parameter settings, ensuring torque boost and motor tuning values map correctly to the updated algorithm structure.

Application Pitfalls & Engineering Notes

When utilizing this inverter in closed cabinets, account for the 6.7 kg thermal footprint. Adequate airflow clearance must be maintained: 5 cm on both sides and 10 cm above/below the unit. Operating in temperatures exceeding 40 degC requires carrier frequency derating via Parameter 72 to prevent overtemperature tripping (E.THT or E.FIN).

Commissioning & Wiring Tips

Ensure that all analog control signals (terminals 2, 4, and 10) are wired with shielded, twisted-pair cables. Ground the shield exclusively at the drive-end SD terminal to prevent ground loops. Never route motor output leads (U, V, W) in the same conduit as control or communications cables.

Installation Guidelines

CRITICAL WARNING: Ensure main input line power (R/L1, S/L2, T/L3) is completely de-energized and locked out before attempting installation or maintenance. Wait a minimum of 10 minutes post-power-down for the DC bus capacitors to discharge. Verify the DC voltage across terminals P/+ and N/- is below 30V using a calibrated digital multimeter before handling terminals.

Mount the inverter vertically to a flat, rigid metal backplate to ensure optimal heat dissipation and grounding path efficiency.

Connect the protective earth (PE) terminal to the system ground busbar using low-impedance braided strap or green-and-yellow grounding conductor.

Wire the three-phase AC input to R/L1, S/L2, T/L3, and connect the motor leads to U, V, and W. Do not install a power factor correction capacitor on the output side.

Establish control wiring loop via standard sink logic or switch to source logic configuration utilizing the internal jumper block as specified by system drawings.

Key Features:

#Mitsubishi FR-A800 #Variable Frequency Drives

What is the meaning of the -60 suffix on this inverter?

The -60 suffix denotes a standard model built with conformal circuit board coating compliant with IEC 60721-3-3 Class 3C2 for chemical/corrosive resistance, but without plated conductors.

Can I use the FR-A840-00250-2-60 with a single-phase supply?

No. This 400V class model is designed strictly for a balanced 3-phase AC input (380 to 500V, 50Hz or 60Hz).

How long must I wait to service the drive after disconnecting power?

You must wait at least 10 minutes to allow the DC bus capacitors to fully discharge. Always measure the DC voltage across terminals P/+ and N/- to confirm it is below 30V before handling.

Does this model support Modbus RTU communications out of the box?

Yes. This drive features built-in RS-485 communication ports on the control terminal block supporting Modbus RTU protocol as standard.

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Rückgaben & Garantie

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12-Monats-Garantie: Jede Industriekomponente ist durch unsere professionelle technische Garantie abgesichert.

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Mitsubishi Electric FR-A840-00250-2-60 FR-A800 Series Variable Frequency Drive