Overview

The WESTINGHOUSE 3A99165 is a legacy Analog Input (AI) Electronics Module designed for the Ovation Distributed Control System (DCS). It converts continuous analog field signals—such as temperature, pressure, and flow—into digital data that the Ovation controller can process.

The module is engineered for high accuracy, robustness, and system integrity, providing necessary signal conditioning and isolation to protect the control logic from electrical noise. Hot-swappable design allows maintenance without interrupting plant operations, making it essential for critical process control applications in power generation, chemical, water treatment, and metals industries.

Technical Data

Typical Applications

• Power Generation Plants: Monitor steam pressure, boiler levels, turbine speed, and other critical process variables.

• Petrochemical & Chemical Processing: Acquire real-time temperature and flow measurements to ensure reaction stability and product quality.

• Water & Wastewater Treatment: Track pH, chlorine levels, and tank levels for regulatory compliance and process optimization.

• Metals & Mining: Monitor furnace temperature, rolling speed, and cooling water flow for quality control in steel mills.

Its rugged design allows continuous operation in demanding 24/7 industrial environments.

FAQ

Q1: Is the 3A99165 compatible with modern Emerson Ovation systems?
A1: It is a legacy Westinghouse-era module. Ovation systems maintain some backward compatibility, but direct interchange with the latest Emerson I/O (like 5X-series) may require adapters or base unit replacement.

Q2: What is the role of the Personality Module (PM) in the Ovation system?
A2: The PM provides the interface to field wiring, including signal conditioning, surge protection, and range configuration. The 3A99165 Electronics Module works with the PM to process the final signal type (e.g., 4–20 mA or 0–10 V).

Q3: What does "Hot-Swappable" mean for this card?
A3: Hot-swappable allows the module to be replaced without shutting down the Ovation system, minimizing maintenance downtime and ensuring continuous process monitoring.