HITACHI LPD250A Power Supply Module

The HITACHI LPD250A is a high-performance power supply module engineered to deliver reliable 24 VDC power to industrial control systems, PLCs, sensors, and actuators. With an output capacity of 5 A continuous, it is well-suited for medium-sized automation applications requiring stable and clean DC power. The unit accepts a wide range of AC inputs from 100 to 240 VAC (50/60 Hz) and incorporates active power factor correction to minimize harmonic distortion and improve energy efficiency. Its compact, slim design (width only 55 mm) allows for space-saving installation on standard DIN rails, making it a preferred choice for crowded control panels.

Key Features

• Universal AC Input: 100–240 VAC (50/60 Hz) with active PFC, suitable for global use.

• Stable 24 VDC Output: Regulated 24 VDC ±1% at 5 A continuous, 6 A peak for up to 5 seconds.

• High Efficiency: Up to 89% efficiency reduces heat dissipation and operational costs.

• Comprehensive Protection: Overload (110–150%), short-circuit (auto-recovery), overvoltage (30–36 VDC shutdown), and overtemperature protection.

• LED Status Indicators: Green LED for output OK, red for fault condition.

• DC OK Relay Contact: Form C relay (1A/30VDC) for remote monitoring of power status.

• Compact DIN Rail Mount: 55 mm width, snaps onto 35 mm DIN rail (TS35).

Technical Specifications

• Input Voltage: 100–240 VAC (50/60 Hz), 140–340 VDC

• Output Voltage: 24 VDC ±1%

• Output Current: 5 A continuous, 6 A peak (5 s)

• Ripple & Noise: ≤ 50 mV p-p

• Efficiency: ≥ 89% at 230 VAC full load

• Hold-up Time: ≥ 20 ms at 115 VAC

• Protection: Overcurrent, short-circuit, overvoltage, overtemperature

• Operating Temperature: -10°C to +60°C (derating above 50°C)

• Dimensions (W×H×D): 55×90×100 mm

• Certifications: CE, UL 508, cUL, RoHS

Applications

The LPD250A is widely used in industrial automation, process control, packaging machinery, and material handling systems. It serves as the primary power source for Hitachi PLC racks, remote I/O stations, and field devices such as proximity sensors, solenoid valves, and operator interfaces. The DC OK relay can be integrated into a PLC input for remote monitoring, enabling predictive maintenance and minimizing downtime.

Integration and Mounting

Installation is quick and tool-free: simply snap the module onto a 35 mm DIN rail. Input and output terminals accept up to 4 mm² wires and are clearly marked. Multiple LPD250A units can be connected in parallel (with external decoupling diodes) for redundancy or higher current requirements. The unit can be mounted in any orientation, but adequate ventilation should be maintained for optimal thermal performance.

Reliability and Compliance

Designed for harsh industrial environments, the LPD250A meets IEC 61000-4 standards for EMC immunity and is tested for vibration and shock resistance. It operates reliably in ambient temperatures up to 60°C with proper derating. The power supply is RoHS compliant and carries CE and UL 508 marks, ensuring global acceptance and safety.

With its robust construction, high efficiency, and comprehensive protection features, the HITACHI LPD250A power supply module delivers the dependable power foundation essential for modern industrial automation.