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Triconex 3351 Analog Input (AI) Module
Triconex 3351 Analog Input (AI) Module - Image 2
Triconex 3201 Communication Module
Triconex 3201 Communication Module
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Triconex 3401 Digital Output Module
Triconex 3401 Digital Output Module

Triconex 3351 Analog Input (AI) Module

Technical Specifications

  • Input and Signal Parameters
    • The analog input version has 32 shared points, with a nominal input current of 4 – 20mA DC and an operating current range of 2 – 22mA DC. It has a 16-bit resolution and an accuracy of ±0.01% within the 1000 – 20000Hz frequency range.
    • The pulse input version has 8 high-frequency input points, a pulse count measurement resolution of 1 microsecond, and an input diagnostic fault range of 0.5% of the full scale. The input change sampling cycle is the longer one between one scan and 210 milliseconds.
    • The module has an input bandwidth of 16Hz, an absolute maximum field voltage of 33V DC, and an absolute maximum reverse field voltage of -0.6V DC.
  • Power and Electrical Parameters
    • The nominal power supply voltage is 24V DC. The minimum isolation between functional and protective earth is 500V DC, and the minimum isolation between functional and functional earth is 800V DC.
    • The module has a source impedance of 180Ω, an input impedance of 250Ω when paired with a baseplate, and a 100Ω I-to-V resistor with a tolerance of ±0.01%.
Category:
Description
    • Physical and Environmental Parameters
      • The module weighs 1.5 kilograms alone and 3 kilograms when including shipping packaging. It has dimensions of 22cm × 16.9cm × 4.4cm and uses aluminum alloy as the shell material.
      • Its operating temperature range is -40°C to 75°C, and the storage temperature range is -40°C to 85°C. It can work normally in an environment with 5% to 95% relative humidity without condensation. It resists vibration of 5g at 10Hz – 2000Hz and impact of 50g for 11 milliseconds.
  • Functional Features
    • Triple Modular Redundancy Ensures Fault Tolerance
      • The triple modular redundancy architecture consists of three identical sub-circuits, each performing independent control operations. When one sub-circuit malfunctions, the other two can immediately take over its tasks. This structure completely avoids system downtime caused by single-point faults and ensures continuous operation of the control process.
    • High Precision and Efficient Signal Processing
      • The module maintains high precision across different frequency ranges, which guarantees the accuracy of data collected from field equipment. All 32 input points can complete scanning in less than 1 millisecond, enabling real-time transmission of field signals to the main controller and ensuring timely responses to changes in industrial processes.
    • Convenient Online Maintenance and Expansion
      • It supports hot swap and on-site online installation and maintenance. Faulty modules can be replaced without affecting on-site wiring or interrupting the control process, greatly reducing maintenance downtime losses.
      • It supports expansion with up to 118 I/O modules and optional communication modules, and can connect to remote I/O modules up to 12 kilometers away from the host, adapting to the needs of different scale industrial systems.
    • Comprehensive Diagnostic and Intelligent Functions
      • It is equipped with force-to-value diagnostic functions that can actively detect module faults and report fault information in a timely manner. Routine maintenance can be carried out while the Triconex system is running.
      • The built-in intelligent functions in the module reduce the workload of the main processor. Each module is equipped with three microprocessors that independently process input signals, improving the overall operational efficiency of the system.
  • Application Scenarios
    • Oil and Gas Industry
      • On offshore drilling platforms and onshore refineries, it is integrated into emergency shutdown systems and fire and gas detection systems. It collects pressure and flow signals of oil and gas pipelines in real time and sends data to the control system to trigger emergency shutdown procedures quickly when leaks or overpressure occur.
      • In long-distance gas transmission pipelines, it monitors the operating parameters of pipeline transmitters, ensuring stable data transmission between the on-site equipment and the remote control center to maintain the safe transportation of gas.
    • Power Industry
      • In thermal power plants, it monitors key parameters such as steam pressure and temperature of boilers and turbines. It transmits abnormal parameter signals to the safety system immediately to activate boiler tripping and turbine protection functions and avoid major power generation accidents.
      • In nuclear power plants, it is used in reactor safety monitoring systems to collect data such as coolant flow and temperature, providing reliable data support for the stable operation of nuclear reactors and ensuring the safety of the entire nuclear power generation process.
    • Chemical and Pharmaceutical Industry
      • In chemical plants producing flammable and explosive substances, it connects to reactor sensors to continuously monitor reaction temperature and material flow parameters. It transmits abnormal data to the control system promptly to cut off the feeding system and prevent dangerous chemical reactions.
      • In pharmaceutical production lines that require strict quality control, it monitors parameters such as the mixing ratio of raw materials and production environment humidity. It ensures that all parameters meet production standards through high-precision signal collection and guarantees product quality and production safety.
    • Metallurgical and Mining Industry
      • In iron and steel plants, it is applied to blast furnace and converter control systems. It collects smelting temperature and furnace pressure signals, helping adjust the smelting process in real time and maintaining stable operation of metallurgical equipment.
      • In mines, it is integrated into mine hoisting system monitoring equipment. It monitors the speed and load signals of hoisting equipment and sends early warning information in time when parameters exceed safety limits to avoid hoisting accidents.
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