HITACHI LYA100A Analog I/O Module

The HITACHI LYA100A is a unique analog combination module that integrates four analog input channels and two analog output channels into a single compact unit. Designed for Hitachi programmable logic controllers, it provides a space- and cost-efficient solution for applications that require both measurement and control capability, such as small machine control or standalone process stations. The module supports 4–20 mA and 0–10 VDC signals on both inputs and outputs, with 12-bit resolution for each channel.

Key Features

• 4 Inputs + 2 Outputs in One Module: Maximizes I/O density and reduces the number of slots required in the PLC rack.

• Flexible Signal Ranges: Inputs and outputs individually configurable for 4–20 mA current or 0–10 VDC voltage.

• 12-Bit Resolution: Ensures precise measurement and smooth control signals for demanding applications.

• High-Speed Conversion: Input scan time of 2 ms per channel, output update of 1 ms, enabling real-time control.

• Isolation: Optical isolation between I/O channels and PLC logic for noise immunity and safety.

• LED Status Indicators: Module power, communication, and channel active LEDs for quick diagnostics.

Technical Specifications

• Analog Inputs: 4 differential channels

• Analog Outputs: 2 single-ended channels

• Input Ranges: 4–20 mA (internal 250 Ω) or 0–10 VDC (selectable per channel)

• Output Ranges: 4–20 mA (load ≤ 600 Ω) or 0–10 VDC (load ≥ 2 kΩ)

• Resolution: 12 bits (input and output)

• Input Accuracy: ±0.3% FS at 25°C

• Output Accuracy: ±0.5% FS at 25°C

• Conversion Speed: Input: 2 ms/channel; Output: 1 ms/channel

• Isolation: 500 VAC between I/O and logic; non-isolated between channels

• Operating Temperature: 0°C to +55°C

• Certifications: CE, UL

Applications

The LYA100A is particularly well-suited for small to medium-sized machines that require both monitoring and closed-loop control, such as packaging machines, plastic thermoformers, and HVAC units. Typical uses include reading pressure or temperature sensors (inputs) and sending control signals to proportional valves or VFDs (outputs) within a compact footprint. It also simplifies wiring and reduces spare parts inventory.

Integration and Configuration

After insertion into a Hitachi PLC rack, the LYA100A is automatically recognized. Engineers configure input and output ranges, scaling, and filtering via Pro-H or EC Runner software. The module's input data is mapped to input registers, and output values are written to holding registers in the PLC's memory. Fail-safe output states can be predefined for use during CPU stop.

Reliability and Environmental Compliance

Built for industrial environments, the LYA100A is tested for immunity to electromagnetic interference, ESD, and vibration. Its operating temperature range of 0°C to 55°C covers most indoor industrial applications. CE and UL markings guarantee compliance with international safety standards.

The HITACHI LYA100A analog combination I/O module offers an elegant solution for applications needing both input and output analog channels, saving space and cost without compromising performance.