Yokogawa AAI143-H50 S1 Analog Input Module

The Yokogawa AAI143-H50 S1 is a rack plug-in analog input module developed for the CENTUM VP DCS platform. It collects standard 4-20mA current signals from field transmitters and converts analog signals into digital data for the DCS controller to realize continuous process monitoring.

This module supports multi-channel isolated signal acquisition and built-in channel diagnostic detection. It is widely used as spare parts for maintenance, replacement and system upgrading of CENTUM VP control cabinets in petrochemical, power and chemical industries.

Main Specifications

• Brand: Yokogawa; Model: AAI143-H50 S1; Type: Analog Input Module
• Applicable System: Yokogawa CENTUM VP Distributed Control System
• Core Tasks: Analog signal acquisition, A/D conversion, signal isolation, channel fault self-diagnosis
• Signal Interface: Field analog wiring terminals, CENTUM VP rack backplane connector
• Installation: Plug-in slot mounting on standard CENTUM VP chassis rack
• Input Signal: 4~20mA analog signal, channel isolation design
• Operating Environment: 0℃ ~ +60℃, 5%‑95% RH non‑condensing, industrial anti‑vibration grade
• Certifications: CE, complies with industrial DCS EMC and safety standards

Core Functions

• Receive 4-20mA signals from pressure, flow, temperature and liquid level transmitters and perform high-precision analog-to-digital conversion.
• Adopt independent channel isolation to resist electromagnetic interference on site and guarantee the accuracy and stability of acquired process signals.
• Real-time detect channel open circuit, short circuit and module hardware faults, and upload alarm information to the DCS operation monitoring station.
• Transmit converted digital process data to the DCS controller through the rack backplane bus for PID closed-loop calculation and process monitoring.
• Standard plug-in design supports fast disassembly and replacement, effectively shortening maintenance downtime of industrial control cabinets.
• Conformal coated PCB improves dust-proof and moisture-proof capability to adapt to long-term stable operation in control room environments.

Application Scenarios

• Spare-part replacement for Yokogawa CENTUM VP DCS control cabinets in petrochemical, power, pharmaceutical and water treatment sites.
• Analog signal acquisition hardware for temperature, pressure, flow and liquid level continuous monitoring loops.
• Maintenance backup inventory for renovation and after-sales maintenance projects of legacy Yokogawa DCS automation equipment.
• Matching analog I/O module cooperating with CENTUM VP power supply, CPU and analog output modules.
• Retrofit replacement for aged modules with signal loss, data deviation and self-diagnosis alarm faults.

• Global aftermarket spare supply for automation maintenance teams maintaining Yokogawa DCS equipment worldwide.