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Hima AIO288/3 Analog Input/Output (AIO) Module

Technical Specifications:

  • I/O Channel Configuration: Typically includes 8 analog input channels and 8 analog output channels (total 16 channels), with a 3-wire connection design for enhanced signal stability.
  • Analog Input Specifications: Supports multiple input types, including 4-20mA current signals (most common for industrial sensors) and 0-10V DC voltage signals. Input resolution is 16 bits, providing high measurement accuracy (±0.1% of full scale). Input impedance is 250Ω for current signals and 1MΩ for voltage signals.
  • Analog Output Specifications: Delivers 4-20mA current outputs or 0-10V DC voltage outputs, with 16-bit resolution and an accuracy of ±0.2% of full scale. Output load capacity is up to 500Ω for current signals and 1kΩ for voltage signals.
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Detailed content

    • Analog Output Specifications: Delivers 4-20mA current outputs or 0-10V DC voltage outputs, with 16-bit resolution and an accuracy of ±0.2% of full scale. Output load capacity is up to 500Ω for current signals and 1kΩ for voltage signals.
    • Safety and Standards Compliance: Certified to IEC 61508 SIL 2 for safety-related analog loops and IEC 60068-2 (environmental testing) for resistance to shock, vibration, and temperature extremes.
    • Operating Parameters: Operating temperature range of -10°C to +55°C, humidity range of 10% to 90% (non-condensing), and power supply of 24V DC (19.2V DC to 28.8V DC) with a typical power consumption of 8W.
    • Calibration: Factory-calibrated with a calibration interval of 12 months (extendable to 24 months with optional field calibration tools), ensuring long-term measurement accuracy.
  • Functional Features:
    • Signal Filtering: Incorporates low-pass filters (configurable cutoff frequencies: 1Hz, 10Hz, 100Hz) on input channels to reduce noise from electrical interference, ensuring stable and accurate measurements of process variables (e.g., pressure, temperature).
    • RTD and Thermocouple Support (Optional): Can be configured with optional modules to support resistance temperature detectors (RTDs, e.g., Pt100) and thermocouples (e.g., Type K, J), expanding its compatibility with temperature measurement devices.
    • Overrange and Underrange Detection: Automatically detects input signals that exceed the full-scale range (e.g., >20mA or <4mA) or fall below it, triggering fault alerts to the SIS controller for immediate investigation.
    • Output Tracking: Analog output channels can be configured to “track” input channels (e.g., mirroring a pressure sensor input to a control valve output), simplifying closed-loop control logic and ensuring precise process regulation.
  • Application Scenarios:
    • Petrochemical Industry: Used to monitor continuous variables such as reactor pressure (via 4-20mA pressure transmitters) as analog inputs and control valve positions (via 4-20mA valve actuators) as analog outputs, maintaining optimal process conditions and preventing overpressure.
    • HVAC Systems in Industrial Buildings: Integrates into building management systems to measure air temperature and humidity (via analog sensors) as inputs and control heating/cooling valves or fan speed (via analog outputs), ensuring comfortable and energy-efficient operation.
    • Pharmaceutical Manufacturing: Applied in bioreactor control, where analog inputs monitor pH levels and dissolved oxygen concentrations, and analog outputs adjust chemical dosing pumps or aeration rates to maintain optimal conditions for cell growth and product quality.

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