Description

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1. Product Overview

The ABB IMASI03 is a high-performance universal analog input slave module engineered exclusively for the ABB Bailey INFI 90 Process Management System, serving as a critical interface between field analog sensors and the system’s multi-function processor (MFP). Designed for reliable industrial process monitoring and control, this module delivers precise signal conditioning, isolation, and analog-to-digital conversion for 16 independently configurable input channels, supporting a wide range of field signal types to address diverse process measurement needs. It streamlines data acquisition for temperature, pressure, flow, and other analog process variables, enhances system signal integrity, and reduces manual calibration overhead by enabling automatic error compensation and drift correction—making it a cornerstone component for stable, accurate DCS operation in heavy industrial environments.

2. Technical Specifications

• Product Model: IMASI03
• Brand: ABB (Bailey INFI 90 Series)
• Warranty: One Year
• Input Voltage: +5 VDC (±5%), +15 VDC , -15 VDC
• Operating Temperature: 0°C to 70°C (32°F to 158°F)
• Storage Temperature: -40°C to 85°C
• Resolution: Programmable 16–24 bit A/D conversion (adjustable in 2-bit increments)
• Accuracy Class: ±0.015% full scale range (FSR) at 24-bit resolution (25°C ambient)
• Input Channels: 16 individually isolated, configurable analog input channels
• Supported Input Types: Thermocouples (E/J/K/L/N/R/S/T/U), 3-wire RTDs, millivolt (-100mV to +100mV), high-level voltage , 4-20mA current loops
• Isolation Rating: 250 VRMS continuous (channel-to-channel, channel-to-system)
• Communication Interface: Slave Expander Bus (INFI 90 proprietary parallel bus)
• Signal Rejection: -110dB common-mode rejection (50/60Hz), -80dB normal-mode rejection (50/60Hz)
• Mounting: Single-slot installation in standard INFI 90 Module Mounting Unit (MMU)
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3. Main Features and Advantages

• Multi-Signal Compatibility: Supports thermocouple, RTD, millivolt, voltage, and 4-20mA inputs on a single module, eliminating the need for multiple dedicated I/O cards and simplifying system hardware design. This flexibility reduces inventory costs and streamlines retrofits for existing INFI 90 setups, ensuring adaptability to evolving process measurement requirements.
• High-Resolution Programmable Conversion: Offers 16–24 bit adjustable A/D resolution to balance measurement precision and conversion speed, delivering industry-leading accuracy for critical process variables. The high-resolution capability minimizes measurement error, supporting tight process control and compliance with industrial quality and regulatory standards.
• Channel Isolation & Fault Detection: Full channel-to-channel electrical isolation prevents ground loops and signal interference, while built-in open input detection alerts operators to disconnected field wiring or faulty sensors. This feature boosts system uptime by enabling rapid troubleshooting and reducing unplanned downtime from undetected signal faults.
• Automatic Calibration & Drift Compensation: Performs self-calibration during operation to counteract component aging and temperature drift, eliminating manual calibration tasks and maintaining long-term measurement stability. This reduces maintenance labor and ensures consistent performance across fluctuating industrial operating conditions.

4. Application Scenarios

• Thermal Power Generation Facilities: Deployed in boiler and turbine control systems to acquire analog temperature, pressure, and flow signals from critical plant components. The ABB IMASI03 delivers accurate real-time data for load regulation, temperature monitoring, and safety interlocking, supporting efficient and compliant power plant operation.
• Oil & Gas Refining & Processing: Used in distillation columns, reactor units, and pipeline monitoring systems to capture analog inputs from temperature transmitters, pressure gauges, and flow meters. Its robust isolation and signal conditioning capabilities maintain data integrity in harsh, high-interference refinery environments, supporting safe and efficient hydrocarbon processing.
• Chemical Processing Plants: Integrated into continuous process control systems for monitoring pH levels, reaction temperatures, and liquid flow rates in batch and continuous production lines. The module’s universal input support and high accuracy enable precise process regulation, minimizing product waste and ensuring adherence to strict chemical manufacturing specifications.
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5. Frequently Asked Questions (FAQ)

Question: What are the main functions of the ABB IMASI03?

Answer: The ABB IMASI03 conditions, isolates, and converts up to 16 analog field signals into digital data for the INFI 90 DCS multi-function processor, supporting diverse input types and enabling accurate, reliable process variable monitoring and control.

Question: Is the ABB IMASI03 compatible with existing INFI 90 DCS systems?

Answer: Yes, the IMASI03 is fully backward-compatible with standard ABB Bailey INFI 90 systems, integrates seamlessly with MFP modules (IMMFP01/02/03) via the slave expander bus, and fits standard INFI 90 mounting racks without system modification.

Question: Does the module require ongoing manual calibration?

Answer: No, the ABB IMASI03 features automatic on-board calibration and drift compensation, eliminating routine manual calibration and sustaining measurement accuracy throughout its operational life.