Control Techniques M702-04400172A High-Performance AC Drive
The Control Techniques M702-04400172A is a premium, safety-enhanced variable speed drive (VSD) from the high-performance Unidrive M700 range. Operating on a three-phase 380–480 VAC input, this Size 4 frame AC drive delivers a heavy-duty rating of 7.5 kW (10 HP) with a continuous output current of 17.2 A, and can run normal duty configurations up to 11 kW (15 HP) at 24.0 A. Designed specifically for high-speed motion synchronization and multi-axis performance, the M702 configuration swaps out standard analog I/O for dedicated dual Safe Torque Off (STO) inputs, optimizing connection density for modern safety-critical automated architectures.
Key Specifications & Electrical Performance
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Part Number: M702-04400172A
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Manufacturer: Control Techniques (Nidec)
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Frame Size: Size 4
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Input Voltage: Three-Phase, 380 to 480 VAC $\pm$10% (50/60 Hz)
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Output Phase: Three-Phase
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Motor Power (Heavy Duty): 7.5 kW (10 HP)
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Motor Power (Normal Duty): 11 kW (15 HP)
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Rated Output Current: 17.2 A (Heavy Duty) / 24.0 A (Normal Duty)
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Overload Capacity: 200% for 28 seconds (Heavy Duty)
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Ingress Protection Rating: IP20 / UL Open Class
Dedicated Dual-Channel Safe Torque Off (STO) Hardware
The defining asset of the Unidrive M702 configuration is its safety-focused hardware design. The M702-04400172A replaces the conventional localized analog terminals of the standard M700 model with a dedicated dual-channel Safe Torque Off (STO) system certified to SIL3 (Safety Integrity Level 3) and PLe (Performance Level e) safety ratings. By routing safety loops directly through independent hardware channels, the drive coordinates with centralized safety controllers while reducing physical panel footprint and eliminating the need for expensive external safety contactors.
High-Bandwidth Motor Control & Integrated Universal Feedback
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Universal Motor Control: Features standard support for open-loop vector, V/Hz induction, Rotor Flux Control (RFC-A), and advanced closed-loop permanent magnet servo control (RFC-S).
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High Bandwidth Loop: Operates with an optimized current loop bandwidth of up to 3,300 Hz and a speed loop bandwidth of up to 250 Hz.
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Onboard Feedback Interface: Incorporates a high-resolution feedback interface supporting absolute EnDat 2.2, Hiperface, BiSS, SSI, SinCos, incremental quadrature, and resolver technologies. It manages up to three simultaneous encoder channels for feedback, external positioning references, and simulated encoder output.
Dual-Port Real-Time Ethernet & Program Execution
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Precision Time Protocol: Features an onboard dual-port Ethernet switch with Real-Time Motion over Ethernet (RTMoE) and IEEE 1588 V2 Precision Time Protocol synchronization. This yields rapid axis synchronization with cycle times down to 250 μs.
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CODESYS-Based Onboard PLC: Houses an integrated controller programmed with Machine Control Studio (CODESYS) to run localized PLC logic loops, system diagnostics, and motion tasks compliant with IEC 61131-3.
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Three Expansion Slots: Accommodates up to three System Integration (SI) modules simultaneously to expand communications (PROFINET, EtherCAT, PROFIBUS), feedback channels, or I/O limits.
Recommended Industrial Applications
Engineered for highly synchronized multi-axis equipment requiring strict machine safety protocols and high dynamic response, the M702-04400172A is optimized for:
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Multi-axis packaging lines, labeling systems, and cartoning machinery
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High-speed flying shears, rotary cutters, and print registration lines
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Precise metal cutting, grinding, and CNC machine spindle systems
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Heavy-duty winders, unwinders, tension-controlled lines, and web handling
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