Product Overview

The Yokogawa LCAC is a high-precision Signal Conditioner PCB designed for use within the CENTUM series Distributed Control Systems (DCS). It performs essential signal normalization and galvanic isolation between field instruments and the system’s I/O processing units. By conditioning raw analog signals from sensors and transmitters, the LCAC ensures accurate, stable, and noise-resistant data transmission to the control system. We supply this component as 100% brand new, original factory hardware to maintain high signal integrity and reliable performance in industrial automation applications.

Technical Specifications

Engineering Advantages

Precision Galvanic Isolation
The LCA*C incorporates onboard isolation to electrically separate field signals from the DCS backplane. This prevents ground loops and protects sensitive control electronics from voltage spikes and transients originating in the field.

Superior Noise Rejection
Integrated filtering circuits suppress high-frequency EMI and RFI, ensuring stable and accurate signal acquisition even in environments with nearby VFDs, motors, and switching equipment.

Low Thermal Drift Design
The use of high-stability components minimizes signal deviation across temperature variations, maintaining consistent performance without frequent recalibration.

High-Density Rack Integration
The compact PCB form factor enables efficient use of I/O nests, increasing channel density while reducing cabinet space and overall system footprint.

FAQs

Can the LCA*C replace older LCA series boards?
It may be compatible with legacy systems depending on the specific suffix variant. Compatibility should be verified based on signal type, impedance, and system configuration.

Does the board require calibration?
No field calibration is typically required. Each unit is factory-calibrated, and only a system-level verification (such as a loop check) is recommended after installation.

What are common indicators of a faulty board?
Symptoms include “Signal Frozen” or I/O read errors on the HIS, along with a lit FAIL LED indicating internal diagnostic detection of a hardware issue.

How is the board secured in high-vibration environments?
The LCA*C uses locking tabs that secure the PCB into the I/O nest. Proper installation ensures mechanical stability and prevents signal interruption due to vibration.