HITACHI LPP100A Power Supply Module

The HITACHI LPP100A is a dedicated power supply module engineered to provide reliable and clean DC power to Hitachi programmable logic controller (PLC) racks and associated field devices. As a fundamental component of the L-series PLC system, it converts incoming AC line voltage to a regulated 24 VDC output capable of delivering up to 1.3 A. This module ensures that the CPU, I/O modules, and any powered sensors or actuators receive stable power under varying load conditions, thereby safeguarding system integrity in continuous industrial processes.

Key Features

• Wide Input Voltage Range: Accepts 100–240 VAC (50/60 Hz) or 110–140 VDC, making it suitable for global installations and diverse power grids.

• Stable 24 VDC Output: Provides a tightly regulated 24 VDC (±5%) at 1.3 A continuous current, sufficient for most small to medium PLC configurations.

• Comprehensive Protection: Built-in overcurrent, short-circuit, and overvoltage protection automatically disconnects the output in fault conditions, then recovers once the fault is cleared.

• LED Status Indicators: Front-panel LEDs show power on (PWR) and output fault (FAULT) for immediate visual diagnosis.

• Compact Footprint: Occupies a single slot in the PLC rack, minimizing space requirements in crowded control panels.

• Parallel Operation Capability: Multiple LPP100A modules can be connected in parallel for redundancy or increased output current (with external decoupling diodes).

Technical Specifications

• Input Voltage: 100–240 VAC (50/60 Hz) or 110–140 VDC

• Output Voltage: 24 VDC ±5%

• Output Current: 1.3 A continuous (2.0 A peak for 5 seconds)

• Ripple & Noise: ≤ 50 mV p-p

• Efficiency: ≥ 80% at full load

• Hold-up Time: ≥ 20 ms at rated input

• Protection: Overcurrent (105–150%), short-circuit (auto-recovery), overvoltage (30–36 VDC shutdown)

• Operating Temperature: -10°C to +55°C

• Certifications: CE, UL 508, cUL

Applications

The LPP100A is used in a wide range of automated systems including assembly lines, packaging machinery, material handling, and process control skids. It serves as the main power source for the PLC rack and can also supply 24 VDC to field sensors, small relays, and indicator lights. In safety-critical installations, two LPP100A modules can be configured in a redundant setup to maintain operation even if one unit fails.

Integration and Installation

Installation is straightforward: the module snaps directly onto the DIN rail within the PLC rack and connects to the backplane automatically. Input and output terminals are easily accessible via screw terminals. The wide input range allows connection to either phase-to-neutral or phase-to-phase AC supplies. The module also features a DC OK relay contact that can be monitored by the PLC for remote status indication.

Reliability and Environmental Compliance

Designed for harsh industrial environments, the LPP100A meets IEC standards for vibration, shock, and electrical noise immunity. Its operating temperature range from -10°C to 55°C covers most indoor applications. The power supply is fully compliant with RoHS and carries CE and UL marks, ensuring global acceptance and safety.

With its robust construction and essential protection features, the HITACHI LPP100A power supply module delivers the dependable power foundation required for modern PLC-based automation systems.