The FR-E740-016-NA is a 0.75 kW three-phase 400 V AC variable frequency drive from Mitsubishi Electric, part of the FREQROL-E700 series — a compact, advanced sensorless vector inverter range offering enhanced motor control performance and communication capability compared to the D700 series, for North American market applications. Available now at Atlantech Drives with worldwide express delivery and 12-month warranty — complete our quote form for pricing and availability.
What Is the Mitsubishi FR-E740-016-NA?
The FR-E740-016-NA is the 0.75 kW model of the FR-E740 sub-series, designed for three-phase 380–480 V AC supply and carrying UL/cUL certification for North American installations. The -016 designation refers to the rated output current of 1.6 A. The E700 series represents a step above the D700 in Mitsubishi’s inverter hierarchy, offering optimum excitation control for improved motor efficiency, a built-in PLC function (simple sequence program execution within the inverter), and support for a wider range of communication option cards — including CC-Link, PROFIBUS-DP, and DeviceNet — making it significantly more integration-capable than the D700 for networked machine architectures. The FR-E740 sub-series specifically targets three-phase 400 V class installations, distinguishing it from the FR-E720 (200 V class) variants.
Key Technical Specifications
- Rated output power: 0.75 kW (1 HP)
- Rated output current: 1.6 A
- Input voltage: 380–480 V AC, 3-phase, 50/60 Hz
- Output voltage: 0–480 V AC, 3-phase
- Output frequency range: 0.2–400 Hz
- Control method: Advanced magnetic flux vector (sensorless), optimum excitation control, V/F
- Overload capacity: 150% for 60 seconds, 200% for 0.5 seconds
- Built-in brake transistor: Yes
- Built-in PLC function: Yes (simple sequence program, 16 steps max)
- Communication: RS-485 (Modbus RTU) via PU connector; optional CC-Link, PROFIBUS-DP, DeviceNet via option cards
- Certifications: UL, cUL (North America), CE
- Enclosure rating: IP20
- Operating temperature: –10 to +50°C
- Dimensions (W × H × D): 68 × 128 × 118 mm
Typical Industrial Applications
The FR-E740-016-NA’s combination of advanced sensorless vector control, built-in PLC function, and broad communication option support makes it suited for applications requiring more than simple variable speed control. Representative deployments include: pump and fan systems in 400 V three-phase industrial facilities where the optimum excitation control function reduces motor iron losses at partial load, delivering measurable energy savings over constant V/F operation; conveyor and material handling systems where the built-in PLC function executes simple sequencing logic (multi-step speed profiles, timer-based operations) without requiring an external PLC for basic automation tasks; networked machine architectures where CC-Link or PROFIBUS-DP option cards enable the inverter to receive speed references and operating commands from a MELSEC-Q master or third-party PLC over a fieldbus network; and HVAC applications in commercial buildings on 400 V three-phase distribution, where the PID function and energy-saving control reduce annual electricity consumption on variable-torque loads.
Expert Tips
- The FR-E740’s built-in PLC function (Pr.414 = 1 to enable) can execute a simple sequence program of up to 16 steps stored in the inverter’s internal memory, using the FR Configurator2 software. This is particularly useful for standalone conveyor or pump applications requiring multi-speed operation based on digital input combinations — the sequence program can select from up to 15 preset speeds (Pr.4–Pr.6, Pr.24–Pr.27) based on the state of input terminals, eliminating the need for an external PLC entirely in simple applications.
- When installing a CC-Link option card (FR-A7NC) in the FR-E740-016-NA, set the station number (Pr.542) and baud rate (Pr.543) before connecting the CC-Link cable — the inverter must be powered down to install the option card, but parameters can be set via the PU panel before the option card is fitted. Verify that the station number does not conflict with other nodes on the CC-Link network before energising.
- The optimum excitation control function (Pr.60 = 3) automatically reduces the motor flux to the minimum level required to produce the demanded torque at any given operating point, reducing iron losses by 10–20% on lightly loaded motors compared to standard V/F control. Enable this function for pump and fan applications where the motor regularly operates below 50% of rated torque to maximise energy savings.
- For 400 V class drives, always install an input line reactor when the supply transformer capacity exceeds 500 kVA or when the supply has significant harmonic distortion — the FR-E740’s diode rectifier front-end is sensitive to supply voltage asymmetry and harmonic content, and a line reactor protects the DC bus capacitors from premature failure due to high peak charging currents.
Frequently Asked Questions
Q: What is the key difference between FR-E740-016-NA and FR-D740-016-NA at the same power rating?
A: The FR-E740 includes the built-in PLC function, optimum excitation control for energy saving, and support for fieldbus option cards (CC-Link, PROFIBUS-DP, DeviceNet). The FR-D740 offers none of these features. If the application requires fieldbus integration or any internal sequencing logic, the FR-E740 is the required selection. For simple variable speed control without network integration, the FR-D740 is the lower-cost alternative.
Q: Can the FR-E740-016-NA be used with a permanent magnet (IPM) motor?
A: The FR-E740 supports PM motor control via the IPM motor control mode (Pr.800 = 30), which uses the drive’s sensorless vector algorithm adapted for the PM motor’s back-EMF characteristics. Auto-tuning (Pr.96 = 1) must be performed with the PM motor connected before first use to identify motor parameters. Not all PM motors are compatible — verify the motor’s rated voltage, current, and pole count against the FR-E700 IPM motor selection guide before commissioning.
Q: Is the RS-485 communication port on the FR-E740-016-NA the same as on the FR-D740?
A: Yes. Both series use the same proprietary PU connector for RS-485 Modbus RTU communication, requiring the same FR-A7DP or compatible adapter for standard RS-485 wiring. The Modbus register map and parameter numbers differ between D700 and E700 series — always use the FR-E700 instruction manual register tables, not the FR-D700 tables, when writing Modbus communication routines for the FR-E740.
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