HITACHI LPP100A

Description

Introduction to the HITACHI LPP100A

Product Description

The HITACHI LPP100A is a programmable logic controller (PLC) power supply unit from Hitachi’s industrial automation lineup. This dedicated module is engineered to provide clean, stable, and reliable DC power to the central processing unit (CPU) and input/output (I/O) modules of a Hitachi PLC system. The HITACHI LPP100A ensures that the sensitive electronic components within the PLC rack receive consistent voltage levels, protecting against fluctuations, noise, and transients from the primary AC mains supply. It acts as the foundational power source, converting typical industrial AC voltage (e.g., 100-240VAC) to the low-voltage DC power (e.g., 24VDC) required for logic circuitry and sensor/actuator interfaces. The reliability of the LPP100A is critical for the uninterrupted operation of the automated control system it supports. Proper sizing and installation of the HITACHI LPP100A are essential first steps in any control panel design.

Product Parameters

• Brand & Series: Hitachi PLC (e.g., H Series, EH-150 series compatible component)

• Model: LPP100A

• Device Type: PLC Power Supply Module

• Input Voltage: Wide-range AC input (e.g., 100-240 VAC, 50/60 Hz).

• Output Voltage: Typically supplies +5 VDC for CPU/logic and +24 VDC for I/O circuits.

• Output Current/Power: Rated for a specific current on each output rail (e.g., 5V @ X A, 24V @ Y A), defining the total load capacity.

• Mounting: Designed to mount on a standard DIN rail or directly to a panel within a PLC rack enclosure.

• Protections: Includes safeguards such as overcurrent protection, overvoltage protection, and thermal shutdown.

• Status Indicators: LED indicators for power on and fault conditions.

Advantages and Features

The HITACHI LPP100A offers key advantages in system stability and design simplicity. Its primary feature is providing a dedicated, filtered power source specifically matched to the requirements of Hitachi PLC components, which minimizes compatibility issues. It offers high efficiency and stable voltage regulation, even with fluctuations in the input AC line, ensuring the PLC operates correctly. The compact and self-contained design of the LPP100A simplifies cabinet layout and wiring. Its built-in protections help safeguard the more expensive CPU and I/O modules from electrical damage due to power anomalies, contributing to overall system longevity and reduced downtime.

Application Cases in Industry

This power supply is used across a broad spectrum of industries wherever Hitachi PLCs are deployed for machine and process control. In factory automation, the HITACHI LPP100A powers PLCs controlling assembly lines, conveyor systems, and robotic cells. Within building automation, it supplies power to control systems for HVAC, lighting, and access control. For water treatment and infrastructure, it ensures reliable operation of PLCs managing pump control and filtration processes. It is also commonly found in packaging machinery, material handling systems, and various standalone industrial machines that utilize Hitachi controllers for reliable logic execution.

Comparison with Competing Products

Competing products include PLC power supplies from major manufacturers like Siemens (SITOP), Mitsubishi Electric, Omron, and generic third-party DIN-rail power supplies. The HITACHI LPP100A differentiates itself through guaranteed compatibility and optimized performance with Hitachi’s own PLC hardware. While generic 24VDC supplies may power the I/O, they may not provide the specific +5V logic rail or have the same form factor for direct rack integration. Compared to other brand-specific supplies, the LPP100A is competitively designed for reliability within its ecosystem. Its value is most apparent in maintaining a single-vendor solution, which can simplify technical support and spare parts inventory.

Selection Suggestions and Precautions

Selecting the HITACHI LPP100A requires a careful calculation of the total power consumption of all modules in the PLC system. Sum the current requirements for both the +5V (CPU, communication modules) and +24V (digital/analog I/O, sensor loads) rails. The LPP100A‘s output ratings must exceed the total calculated load with a safe margin (typically 20-30%). Verify that the input voltage range matches your facility’s available AC power. Ensure the physical dimensions and mounting style are compatible with your control panel layout.

Precautions:

• Installation should be performed by a qualified electrician in accordance with local electrical codes.

• Ensure proper grounding of both the AC input and DC output sides of the power supply.

• Provide adequate ventilation around the LPP100A module to prevent overheating, respecting its specified ambient temperature limits.

• Do not exceed the maximum output current ratings, as this will trigger protective shutdowns or cause permanent damage.

• When connecting external 24VDC sensor loads, ensure they are properly fused. The PLC’s internal 24V rail from the HITACHI LPP100A is not intended to replace a main panel power supply for large distributed loads.

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