AL129A
Yokogawa AL129A Analog Input Module
Product Description
The AL129A is a high-performance analog input module designed for Yokogawa’s Centum VP distributed control system (DCS), specialized in acquiring and processing analog signals from industrial sensors and transmitters. It serves as a critical interface between field devices (such as temperature, pressure, and flow transmitters) and the DCS controller, converting continuous physical quantities into digital data for real-time monitoring, control, and analysis. This module is widely used in process industries including oil and gas (wellhead pressure monitoring), chemical processing (reactor temperature sensing), and power generation (boiler steam flow measurement), where accurate and reliable analog signal acquisition is essential for maintaining process stability and product quality.
In a natural gas processing plant, the AL129A module connects to multiple pressure transmitters installed along the gas pipeline. It collects the 4-20 mA signals from these transmitters, which correspond to pipeline pressure levels, and conditions them to filter out noise from compress