LÜTZE Launches High Efficiency Decentralized DFPS Series Rugged Industrial Power Supplies

In industrial manufacturing, conveying systems, and process automation, conventional power distribution relies on centralized control cabinets that require long cable runs to field actuators and sensors. These long DC conductor distances frequently introduce voltage drops, increase wiring complexity, and demand climate-controlled cabinet volume. To overcome these constraints, machine builders increasingly deploy decentralized automation architectures, relocating power conversion directly onto the machine frame or conveyance system.

Industrial On-Machine Power Conversion
The LÜTZE DFPS series addresses these design challenges by providing decentralized power conversion in an IP67-rated enclosure measuring 177 x 192.2 x 59.6 mm. Designed for field deployment without auxiliary protective housing, the units resist ingress from dust, moisture, and water jets typical of industrial factory environments. The series comprises two 720 W models: the 24 V version (DFPS3-720-24-00, Part No. 723701), supplying up to 30 A, and the 48 V version (DFPS3-720-48-00, Part No. 723702), supplying up to 15 A.

Conversion efficiency reaches 96.7% in the 24 V unit and 96.8% in the 48 V model. High electrical efficiency minimizes thermal losses inside the sealed enclosure, maintaining passive heat dissipation across the housing. Operational derating for the units initiates at an ambient temperature of +45 °C.

Supply Network Compatibility and Power Reserves
To ensure compatibility across global three-phase distribution networks, the devices incorporate a wide-range three-phase AC input spanning 320 to 600 V, alongside a DC input capability ranging from 425 to 800 V. Active inrush current limiting prevents upstream circuit breaker tripping during initial power-up, while an active power factor correction (PFC) stage achieves a power factor greater than 0.9 to comply with harmonic grid standards.

Dynamic industrial loads such as servo drives, solenoid valves, and motor starters demand brief peak currents during startup. The DFPS power supplies incorporate an integrated PowerBoost function capable of delivering 150% of rated capacity, or 1,080 W, for up to five seconds. This reserve capacity allows system designers to size power supplies based on continuous nominal consumption rather than sizing strictly for transient peak loads.

Field Integration and System Monitoring
Electrical interconnection is implemented via standardized M12 connectors, providing vibration-resistant terminations suitable for direct mechanical mounting on production lines, robotics cells, and material handling systems. The secondary circuit is configured as a Protective Extra-Low Voltage (PELV) output, with the negative terminal bonded to protective earth (PE) to meet international electrical safety standards.

For system diagnostics, an integrated DC-OK relay contact reports the operational state of the secondary voltage to external control systems or programmable logic controllers (PLCs). Clearly designated connector labeling and an on-housing QR code facilitate field commissioning and documentation access. Both versions hold cULus certification for compliance with North American electrical installation codes.

Additional Context
This section details technical specifications and competitive benchmarking not included in the original product announcement.

The transition toward IP67 decentralized power supplies represents a broader industry shift toward cabinet-free automation, guided by standards such as NFPA 79 (Electrical Standard for Industrial Machinery) and IEC 60204-1. By locating power conversion adjacent to field loads, automation engineers reduce copper cross-sections and eliminate thermal loads inside primary enclosures.

Comparable decentralized three-phase IP67 power units in the 700 to 1,000 W class typically achieve conversion efficiencies ranging from 95.0% to 96.5%, placing the 96.7% and 96.8% ratings of the DFPS series at the upper threshold for passively cooled field-mount supplies. In industrial conveyance and 48 V motorized roller conveyor (MDR) applications, 48 V DC distribution is increasingly adopted over 24 V architectures to halve conductor current and further minimize I²R line losses over extended production runs.

Edited by Evgeny Churilov, Induportals Media - Adapted by AI.

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