Control Techniques M400-03400056A Variable Frequency Drive
The Control Techniques M400-03400056A is an industrial, safety-integrated variable frequency drive (VFD) from the Unidrive M400 range, engineered for precise machine integration and high-performance open-loop induction motor control. Operating on a three-phase 380-480 VAC input, this Size 3 frame AC drive delivers a rated power output of 2.2 kW (3.0 HP) and a continuous output current of 5.6 A. Built to maximize machine throughput and maintain strict compliance with functional safety codes, it features an intuitive multi-language text display and dual Safe Torque Off (STO) inputs.
Key Specifications & Electrical Performance
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Part Number: M400-03400056A
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Manufacturer: Control Techniques (Nidec)
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Frame Size: Size 3
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Input Voltage: Three-Phase, 380 to 480 VAC $\pm$10% (48 to 62 Hz)
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Output Phase: Three-Phase
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Motor Shaft Power: 2.2 kW (3.0 HP)
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Rated Output Current: 5.6 A
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Overload Capacity: 180% for 3 seconds (heavy duty), 150% for 60 seconds
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Ingress Protection Rating: IP21 / UL Open Class
Integrated Functional Safety and Real-Time Diagnostics
The primary engineering advantage of the Unidrive M400 series is its onboard functional safety hardware and rapid diagnostics. The M400-03400056A includes integrated dual-channel Safe Torque Off (STO) inputs certified to SIL3 (Safety Integrity Level 3) and PLe (Performance Level e) standards. This eliminates the requirement for external safety contactors, optimizing control panel space. The drive is also equipped with a multi-language CODESYS-based text display keypad that outlines full parameter descriptions and active status tracking to reduce system downtime.
Advanced Motor Control via RFC-A Technology
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RFC-A Mode: Utilizes an advanced Rotor Flux Control algorithm that yields high-performance closed-loop current control in an open-loop design. This delivers exceptional speed stability under fluctuating loads, high starting torque, and rapid dynamic response without speed feedback devices.
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Onboard Logic Programming: Includes an integrated controller compliant with the IEC 61131-3 standard, enabling localized automation scripts and basic PLC logic to run directly inside the drive.
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Conformal Coated Circuit Boards: Standard heavy-duty conformal coated printed circuit boards (PCBs) protect internal electronics from humidity, conductive dust, and high thermal environments.
Modular Network Connectivity and Fast Commissioning
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System Integration (SI) Slot: Features a built-in SI option slot to host external communication modules. The drive can interface with major manufacturing PLCs using PROFINET, EtherCAT, Ethernet/IP, Modbus TCP, CANopen, and PROFIBUS.
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Parameter Cloning Layout: Fully compatible with the optional AI-Back-up or AI-Smart Adaptor to clone, store, and transfer setup profiles via standard SD cards.
Recommended Industrial Applications
Engineered to withstand heavy-duty industrial cycles while minimizing machinery safety footprints, the M400-03400056A is optimized for:
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Safety-critical automated material handling systems and conveyors
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Heavy-duty ventilation systems, industrial blowers, and extraction fans
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High-reliability centrifugal and positive displacement fluid pumps
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Industrial mixers, packaging machinery, and commercial sorting lines
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