HITACHI LYT000A

Product Parameters

• Model: HITACHI LYT000A

• Series: H Series / EH-150 Series

• Type: AC Power Supply Unit (Base-mounted)

• Input Voltage: 100 to 240 VAC, universal (50/60 Hz)

• Output Power: Approximately 30 Watts (typical for H Series base units)

• Output Voltages: +5 VDC (for logic/backplane) and +24 VDC (for I/O and field devices)

• Mounting: Mounts directly to the left side of the H Series or EH-150 CPU base unit

• Status Indicators: Power ON (PWR) LED

• Protection: Overcurrent protection and short circuit protection

• Cooling: Natural convection (fanless design)

Advantages and Features

The HITACHI LYT000A offers several advantages for compact and mid-range automation applications.

• Compact Integrated Design: Unlike modular power supplies that occupy separate chassis slots, the HITACHI LYT000A integrates directly with the base unit, minimizing overall system footprint. This is particularly valuable in control panels with limited space.

• Universal AC Input: The auto-ranging input capability allows the HITACHI LYT000A to operate on 100-240 VAC without manual configuration or jumper adjustments. This simplifies global deployment and reduces commissioning time.

• Fanless Operation: Designed with natural convection cooling, the HITACHI LYT000A operates silently and eliminates the maintenance concerns associated with cooling fans. This enhances long-term reliability in dusty or particulate-laden environments.

• Robust Protection Circuitry: Built-in overcurrent and short circuit protection safeguards both the power supply and the connected CPU and I/O modules. In the event of a field wiring fault, the HITACHI LYT000A will limit output current, preventing catastrophic damage to the system.

• Seamless Platform Integration: The HITACHI LYT000A is specifically engineered for Hitachi’s H Series and EH-150 platforms, ensuring optimal power delivery and electrical compatibility with the base unit’s backplane architecture.

Application Cases

The HITACHI LYT000A is widely deployed across discrete manufacturing and infrastructure applications.

• Automotive Assembly Lines: In an automotive parts manufacturing facility, the HITACHI LYT000A powers the EH-150 PLC controlling conveyor systems, pneumatic actuators, and sensor arrays. Its compact design allows multiple control stations to be distributed throughout the production floor.

• Packaging Machinery: High-speed packaging machines utilize the HITACHI LYT000A to provide power for the CPU managing servo positioning, film sealing, and product indexing. The module’s fanless design ensures reliable operation in environments with airborne dust from packaging materials.

• Building Automation: In commercial HVAC and building management systems, the HITACHI LYT000A powers H Series controllers responsible for air handling units, chiller plant integration, and lighting control. The universal input capability accommodates varying facility power configurations.

• Water Treatment Control: Small to mid-sized water treatment facilities deploy the HITACHI LYT000A within EH-150 systems managing filtration backwash cycles, chemical dosing pumps, and level monitoring. The module’s reliability minimizes unplanned downtime for critical infrastructure.

Comparison with Competiting Products

When compared to power supply modules from other PLC platforms, the HITACHI LYT000A offers distinct characteristics:

The HITACHI LYT000A distinguishes itself through its integrated base unit design, which reduces overall system complexity and physical footprint compared to modular alternatives. This makes it particularly well-suited for distributed control architectures where space efficiency is a priority.

Selection Suggestions

When selecting the HITACHI LYT000A for your automation project, consider the following:

1. Platform Compatibility: Verify that your system uses the Hitachi H Series or EH-150 platform. The HITACHI LYT000A is specifically designed for these base units and is not compatible with Hitachi’s EH-100 or other legacy platforms. Confirm the base unit model number before procurement.

2. Power Budget Calculation: The HITACHI LYT000A provides a limited output capacity (approximately 30 watts). Calculate the total power consumption of your CPU, all I/O modules, and any powered communication interfaces. Exceeding the capacity of the HITACHI LYT000A can cause system instability or unexpected resets.

3. Expansion Capability: For systems requiring extensive I/O expansion beyond the base unit’s capacity, verify that the HITACHI LYT000A can adequately power the expansion base units. Some configurations may require additional power supply modules on expansion racks.

4. Spare Parts Strategy: Given that the HITACHI LYT000A is a critical component whose failure results in complete system shutdown, maintain a functional spare on-site for critical applications. This ensures minimal mean time to repair (MTTR) in the event of a failure.

5. Replacement Considerations: If replacing an existing power supply in a legacy installation, verify the revision and electrical specifications of the HITACHI LYT000A against the original unit. Hitachi has released multiple revisions over the years; ensure compatibility with your existing base unit and I/O configuration.

Precautions

• Wiring and Grounding: Proper AC input wiring and grounding are essential for safe and reliable operation of the HITACHI LYT000A. Use appropriately rated wiring and connect the ground terminal to a low-impedance earth ground per Hitachi installation guidelines. Inadequate grounding can lead to electrical noise interference and erratic PLC behavior.

• External Branch Protection: The HITACHI LYT000A includes internal protection, but an external branch circuit protection device (fuse or circuit breaker) must be installed upstream in accordance with local electrical codes. Select an appropriately rated overcurrent protection device based on the input voltage and system configuration.

• Inductive Load Suppression: If the +24 VDC output of the HITACHI LYT000A is used to power inductive field devices such as relays, solenoids, or contactors, install external flyback diodes or suppression devices across each load. Failure to suppress inductive kickback can damage the power supply output stage and cause system malfunctions.

• Environmental Conditions: Operate the HITACHI LYT000A within the specified temperature and humidity ranges (typically 0°C to 55°C / 32°F to 131°F). Ensure adequate clearance around the base unit for natural convection cooling. Do not install the HITACHI LYT000A in enclosures where ambient temperatures exceed the rated limits.

• Electrostatic Discharge (ESD): Although the HITACHI LYT000A is designed for industrial environments, handle the module with ESD precautions when it is outside the base unit. Static discharge can damage sensitive internal components, leading to latent failures that may manifest only after extended operation.

• Power Sequencing: When commissioning a system powered by the HITACHI LYT000A, ensure that the AC input voltage is stable and within specification before applying power to the base unit. Frequent power cycling or operation on unstable power sources can reduce the service life of the power supply.

• Storage Conditions: Store spare HITACHI LYT000A modules in a clean, dry environment within the specified storage temperature range. Avoid exposure to moisture, corrosive gases, or direct sunlight, which can degrade component integrity over time.

For purchasing, technical documentation, or to verify compatibility with your existing Hitachi PLC system, please refer to the official product link: [HITACHI LYT000A](Insert Link Here).