HITACHI LYA210A Analog Output Module

The HITACHI LYA210A is a compact analog output module designed to expand the control capabilities of Hitachi programmable logic controllers. It features four independent output channels, each configurable for either 4–20 mA current or 0–10 VDC voltage signals. With 12-bit resolution and high accuracy, the module ensures smooth and precise manipulation of analog actuators such as variable frequency drives (VFDs), electric control valves, and servo amplifiers.

Key Features

• 4 Analog Output Channels: Provides flexibility for multi-loop control applications while saving rack space.

• Dual Output Range: Per-channel selection of 4–20 mA (load ≤ 600 Ω) or 0–10 VDC (load ≥ 2 kΩ) via software configuration.

• 12-Bit Resolution: Delivers fine granularity for precise setpoint control, with ±0.5% full-scale accuracy.

• Optical Isolation: 500 VAC isolation between output channels and logic, protecting the PLC from field transients.

• Output Hold Function: Configurable behavior on CPU stop or communication loss: hold last value, go to predefined safe state, or output 0.

• LED Diagnostics: Status indicators for module power and communication activity simplify maintenance.

Technical Specifications

• Number of Outputs: 4 channels, individually configurable

• Output Signal Ranges: 4–20 mA (current) or 0–10 VDC (voltage)

• Resolution: 12 bits (4096 steps)

• Accuracy: ±0.5% of full scale at 25°C

• Conversion Speed: 1 ms per channel (typical)

• Load Impedance: ≤ 600 Ω (current), ≥ 2 kΩ (voltage)

• Isolation: 500 VAC between outputs and system; no isolation between channels

• Operating Temperature: 0°C to +55°C

• Certifications: CE, UL

Applications

The LYA210A is essential in process industries such as water treatment, chemical processing, and HVAC, where precise analog control is required. Typical applications include regulating pump speeds via VFDs, positioning control valves for flow or pressure control, and driving chart recorders for data logging. It can also be used in testing and simulation systems to generate analog test signals.

Integration and Configuration

When installed in a Hitachi PLC rack, the LYA210A is automatically detected by the CPU. Using Hitachi's programming software (Pro-H or EC Runner), engineers can assign output ranges, set scaling, and configure fail-safe behaviors for each channel. The module's data registers are directly accessible in the user program, enabling real-time updates of analog outputs based on PID calculations or sequence logic.

Reliability and Environmental Compliance

The module is designed for industrial control panels and is tested for immunity to electrical fast transients, electrostatic discharge, and radiated RF interference per IEC 61000-4 standards. Its operating temperature range of 0°C to 55°C suits most indoor industrial environments. The LYA210A carries CE and UL marks, confirming compliance with international safety and EMC directives.

The HITACHI LYA210A analog output module combines flexibility, accuracy, and reliability, making it a cost-effective solution for expanding analog control in Hitachi-based automation systems.