ABB AI02 2-channel analog input module

ABB AI02 Analog Input Module Technical Parameters and Functions

The ABB AI02 is a 2-channel analog input module designed for integration into ABB’s S800 I/O family, part of the AC 800M and System 800xA automation platforms. It provides high-precision acquisition of analog signals from field sensors (e.g., temperature, pressure, flow) and ensures reliable data conversion for industrial control systems. Below is a detailed breakdown of its technical specifications and functionalities:

1. Key Technical Parameters

General Specifications

• Module Type: 2-Channel Analog Input Module (part of the S800 I/O series).
• Compatibility:
  • Controllers: ABB AC 800M (PM851, PM861, etc.).
  • Systems: ABB System 800xA, Advant OCS.
• Mounting: Installed in S800 I/O racks (supports single or redundant configurations).

Electrical Specifications

• Input Channels:
  • Number of Channels: 2 isolated channels.
  • Input Types: Configurable for voltage or current signals:
    • Voltage: 0–10 V DC, ±10 V DC.
    • Current: 0–20 mA, 4–20 mA (with 250 Ω shunt resistor for current measurement).
  • Resolution: 16-bit (0.0015% of full scale).
  • Accuracy: ±0.1% of reading ±0.05% of range (typical at 25°C).
  • Sampling Rate: 10 samples per second per channel.
  • Isolation:
    • Channel-to-Channel: 500 V AC.
    • Field-to-System: 1500 V AC (galvanic isolation).
• Power Supply:
  • Voltage: 24 V DC (±10%).
  • Power Consumption: <2 W (typical).

Communication Interfaces

• Backplane Communication:
  • Protocol: PROFIBUS DP via S800 I/O bus.
  • Data Rate: Up to 12 Mbps.
• Diagnostics:
  • LED Indicators: Module status (power, communication) and channel-specific alarms (overrange, open circuit).

Environmental and Mechanical

• Operating Temperature: -25°C to +70°C.
• Storage Temperature: -40°C to +85°C.
• Humidity: 5–95% non-condensing.
• Protection Class: IP20 (for panel mounting; requires enclosure for harsh environments).
• Dimensions: 155 x 125 x 40 mm (W x H x D) (standard for S800 modules).
• Certifications: CE, UL, IEC 61326 (EMC), RoHS.

2. Core Functions and Features

Signal Acquisition and Processing

• High Precision: 16-bit resolution ensures accurate measurement of process variables.
• Flexible Configuration: Each channel independently configurable for voltage or current input via software.
• Linearization: Supports scaling and linearization for non-standard sensor outputs (e.g., thermocouples, RTDs with external transmitters).

Diagnostics and Safety

• Fault Detection:
  • Open circuit detection for current loops (4–20 mA).
  • Overrange/underrange alarms.
• Noise Immunity: Shielded inputs and EMC compliance (IEC 61326) for reliable operation in electrically noisy environments.
• Isolation: Prevents ground loops and ensures signal integrity in multi-channel systems.

Integration and Compatibility

• System 800xA Compatibility: Seamless integration for centralized monitoring, data logging, and control.
• Redundancy Support: Hot-swappable design for redundant configurations in critical applications.
• Engineering Tools: Configured via ABB’s Control Builder M software for parameterization, calibration, and diagnostics.

User Interface

• LED Indicators:
  • Module Status: Green (operational), Red (fault).
  • Channel Status: Alarms for signal errors or out-of-range conditions.

3. Applications

• Process Industries: Monitoring pressure, temperature, and flow in oil refineries, chemical plants, and pharmaceuticals.
• Manufacturing: Precision measurement in CNC machinery, robotics, and quality control systems.
• Energy Management: Load monitoring, transformer temperature sensing, and renewable energy systems (solar/wind farms).
• Water Treatment: pH/conductivity measurement, pump control, and tank level monitoring.

4. Advantages

• High Accuracy: 16-bit resolution and low drift ensure reliable data for critical control loops.
• Versatility: Supports both voltage and current inputs, accommodating diverse sensor types.
• Robust Design: Built for harsh industrial environments (vibration, temperature extremes, EMI).
• Scalability: Integrates with other S800 I/O modules (digital, communication) for system expansion.
• Compliance: Meets global standards for safety and electromagnetic compatibility.