Description
INIIT13: Product Overview
The ABB INIIT13 is a legacy analog I/O module designed exclusively for ABB’s Bailey INFI 90 distributed control system (DCS), a fourth-generation platform renowned for its robustness in mission-critical applications like power generation, water treatment, and chemical processing. As a critical interface between field devices and the DCS, the INIIT13 enables precise acquisition and output of analog signals, forming the backbone of process control in industries where accuracy and reliability are paramount.
Role in Automation Systems:
The INIIT13 acts as a “signal translator” for the INFI 90 DCS. It receives analog signals from field devices (e.g., pressure transmitters, temperature sensors, valve positioners) and converts them into digital data for the DCS to process. Conversely, it takes digital commands from the DCS and converts them into analog signals to drive actuators (e.g., control valves, variable speed drives). This bidirectional communication ensures that process variables (e.g., pressure, temperature, flow) are monitored and adjusted in real time, maintaining operational stability and efficiency.
Core Functionality:
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Analog Input Processing: The 8 input channels support multiple signal types (4–20 mA, 0–10 V, ±10 V) with 16-bit resolution, ensuring high accuracy for critical measurements. Each channel includes overvoltage and overcurrent protection to safeguard against field device faults.
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Analog Output Control: The 4 output channels provide 12-bit resolution for driving actuators, with support for 0–10 V and 4–20 mA signals. The module includes short-circuit protection and current limiting to prevent damage to downstream equipment.
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System Integration: The INIIT13 integrates seamlessly with ABB Bailey INFI 90 DCS via the system bus (RS-485), allowing for easy configuration and monitoring through ABB’s engineering tools (e.g., Bailey Net 90).
Platform Benefits (Bailey INFI 90 Series):
The INIIT13 leverages ABB’s legacy of reliability in industrial automation. Key benefits include:
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Backward Compatibility: Compatible with earlier Bailey Control Systems (e.g., Network 90), enabling phased modernization of existing facilities without full system overhauls.
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Scalability: Supports expansion via additional I/O modules (e.g., digital I/O, specialty modules) to accommodate growing operational needs.
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Diagnostic Capabilities: Built-in status LEDs and fault logging simplify troubleshooting, reducing mean time to repair (MTTR) and minimizing downtime.
ABB INIIT13
Technical Specifications
Model Number: INIIT13
Manufacturer: ABB (formerly Bailey Controls)
Product Type: Analog I/O Module
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Analog Inputs: 8 channels (4–20 mA, 0–10 V, ±10 V)
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Analog Outputs: 4 channels (0–10 V, 4–20 mA)
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Resolution: 16-bit (input), 12-bit (output)
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Accuracy: ±0.1% (input), ±0.2% (output)
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Input Impedance: 250 Ω (4–20 mA), 10 MΩ (voltage)
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Output Load: 500 Ω (4–20 mA), 10 kΩ (voltage)
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Communication: RS-485 (INFI 90 system bus)
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Power Supply: 24 V DC (±10%)
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Operating Temperature: -20°C to +70°C (-4°F to 158°F)
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Storage Temperature: -40°C to +85°C (-40°F to 185°F)
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Humidity: 5% to 95% non-condensing
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Dimensions (W×H×D): 100 mm × 75 mm × 20 mm (3.94 in × 2.95 in × 0.79 in)
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Weight: 0.5 kg (1.1 lbs)
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Certifications: CE, UL (inferred from ABB’s industrial product standards)
Core Features & Customer Value
1. High-Precision Signal Processing:
The INIIT13’s 16-bit input resolution and ±0.1% accuracy ensure that critical process variables (e.g., turbine temperature, pipeline pressure) are measured with precision. This accuracy is essential for maintaining product quality in chemical processing or complying with environmental regulations in power generation.
2. Flexible Signal Compatibility:
With support for multiple analog signal types (4–20 mA, 0–10 V, ±10 V), the INIIT13 adapts to diverse field devices without requiring additional signal conditioning hardware. This flexibility reduces installation costs and simplifies inventory management for engineers.
3. Robust Protection Mechanisms:
The module’s overvoltage, overcurrent, and short-circuit protection safeguards both the DCS and field devices from electrical faults. For example, in a power plant, this protection prevents damage to the DCS from a faulty pressure transmitter, minimizing downtime and maintenance costs.
4. Seamless Integration with INFI 90:
The INIIT13’s compatibility with ABB Bailey INFI 90 DCS ensures plug-and-play functionality, reducing setup time and effort. Engineers can configure the module using ABB’s familiar engineering tools, streamlining the integration process.
ABB INIIT13
Typical Applications
The ABB INIIT13 is widely used in industries relying on ABB Bailey INFI 90 DCS for process control:
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Power Generation:
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Monitors turbine temperature, pressure, and flow using 4–20 mA sensors.
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Controls boiler feedwater valves via 4–20 mA outputs to maintain optimal combustion efficiency.
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Example: In a coal-fired power plant, the INIIT13 acquires temperature signals from a turbine and sends commands to adjust the fuel flow, ensuring consistent power output.
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Water Treatment:
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Measures pH, turbidity, and dissolved oxygen using analog sensors.
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Drives chemical dosing pumps via analog outputs to maintain water quality.
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Example: A municipal water treatment plant uses the INIIT13 to monitor pH levels and adjust the amount of chlorine added, complying with environmental regulations.
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Chemical Processing:
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Monitors reaction temperature, pressure, and flow in chemical reactors.
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Controls valve positions via analog outputs to regulate the flow of reactants.
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Example: In a petrochemical refinery, the INIIT13 acquires pressure signals from a reactor and sends commands to adjust the valve opening, maintaining optimal reaction conditions.
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