Yokogawa AAI143‑H50 Analog Input Module

The Yokogawa AAI143‑H50 is an 8‑channel analog input module for Yokogawa CENTUM series DCS FCS control stations. It collects 4‑20mA analog signals from field transmitters, converts them into digital data for DCS controller processing, and supports HART protocol communication for smart instrument parameter access.

This rack‑slot mount module provides channel‑by‑channel isolation and onboard diagnostic LED indicators. It supports hot‑swap operation for online replacement without system shutdown. It is a critical aftermarket spare for maintenance, overhaul and retrofitting of petrochemical, power and chemical‑plant DCS cabinets.

Main Specifications

• Brand: Yokogawa; Model:AAI143‑H50; Type: 8‑Channel Analog Input Module
• Applicable System: Yokogawa CENTUM CS3000 / VP DCS FCS field control station
• Input Signal: 4‑20 mA DC; Protocol: HART; Isolation: Channel‑to‑channel isolation
• Function: Field analog signal acquisition, A/D conversion, HART instrument data reading, channel fault detection
• Feature: Rack slot‑mount installation, hot‑swap capable, per‑channel diagnostic LED indicators
• Installation: Slot‑mount inside Yokogawa DCS FCS chassis
• Power: Back‑plane powered; Operating Environment:0℃ ~ +60℃, 5%‑95% RH non‑condensing
• Certifications: CE compliant for process‑industry DCS automation applications

Core Functions

• Acquire 4‑20 mA current signals from field pressure, flow, temperature and level transmitters.
• Perform high‑precision A/D conversion and transmit digital process values to DCS FCS controller.
• Support HART communication to read secondary variables, tag information and diagnostic data from HART smart field instruments.
• Detect channel open‑circuit, over‑range and hardware faults, and report alarm status to DCS operator station.
• Per‑channel LED status indicators help engineers quickly locate faulty channels during commissioning and maintenance.
• Hot‑swap design allows module replacement without stopping DCS control logic during cabinet overhaul and field troubleshooting.

Application Scenarios

• Field analog signal acquisition component for Yokogawa CENTUM DCS distributed control systems.
• Critical spare‑part for petrochemical, power‑plant, chemical and water‑treatment DCS control cabinets.
• Retrofit and spare replacement for legacy AAI143‑H50 analog‑input‑module DCS‑hardware upgrade projects.
• DCS cabinet overhaul, analog‑loop debugging and faulty analog‑input‑card replacement tasks.
• Spare‑parts inventory for process‑automation integrators and process‑industry engineering contractors.

• Global aftermarket spare supply for technical teams maintaining Yokogawa CENTUM DCS automation hardware.