Triconex 3721C Coated Differential Analog Input Module

Description

• • Physical Parameters
    • Dimensions: Approximately 2.2 cm * 40.8 cm * 40 cm, which fits the installation specifications of Triconex series chassis.
    • Weight: About 2.06 kg, which is slightly heavier than the 3721 model due to its coated structure.
    • Housing Design: Adopts a coated exterior structure that enhances resistance to corrosion and wear.
  • Environmental Parameters
    • Operating Temperature: Ranges from -40°C to 70°C, adapting to extreme temperature changes in both indoor and outdoor industrial sites.
    • Operating Humidity: Works normally in 5% – 95% non-condensing humidity environments, preventing circuit short circuits caused by moisture.
    • Corrosion Resistance: The coated surface can resist corrosion from chemical vapors in petrochemical and other environments, extending the service life of the module.
• Functional Features
  • Enhanced Triple Modular Redundancy: The module adopts a triple modular redundancy architecture. Three independent circuits perform signal collection and processing simultaneously, and the final valid data is determined through an algorithm. This design ensures the module can still operate stably even when individual internal components fail, maximizing system availability.
  • Coated Structure for Harsh Environments: Unlike ordinary modules, the Triconex 3721C has a coated design. This structure strengthens the module’s resistance to corrosion, dust and mechanical wear, enabling it to maintain stable performance in harsh industrial environments such as chemical plants with corrosive gases and dusty manufacturing workshops.
  • High-Precision and Anti-Interference Signal Processing: With high measurement accuracy and excellent common mode rejection ratio, the module can filter out most electromagnetic interference in industrial sites. It ensures the accuracy of collected signals such as temperature and pressure, laying a solid foundation for the upper system to make correct safety control decisions.
  • Strong System Compatibility: It can be seamlessly integrated with Triconex series control systems and is fully compatible with other modules such as the Triconex 3500 series. This compatibility reduces the difficulty of system integration and allows enterprises to upgrade or expand existing Triconex systems without replacing a large number of components.
  • Convenient Maintenance and Fault Diagnosis: The module is equipped with a complete diagnostic function that continuously detects the operating status of each channel. When a channel malfunctions, the module’s fault indicator lights up and triggers the chassis alarm signal. Meanwhile, it supports hot-spare capability, allowing maintenance personnel to replace faulty modules online without shutting down the entire system, minimizing production losses.
• Application Scenarios
  • Oil and Gas Industry: Deployed on offshore drilling platforms and onshore oil transmission pipelines, it collects pressure and flow signals of oil and gas in real time. When abnormal data such as pipeline leakage is detected, it quickly sends signals to the emergency shutdown system to trigger shutdown procedures and prevent explosion and other major accidents.
  • Power Industry: Installed in thermal power plants, nuclear power auxiliary systems and substations, it monitors analog signals such as temperature and pressure of key equipment like boilers and transformers. It helps the safety interlock system respond in time to avoid equipment damage caused by abnormal parameters and ensures the stable operation of the power supply system.
  • Petrochemical Industry: Applied to chemical reactors, distillation towers and other core equipment in refineries and petrochemical plants. It collects real-time data of reaction temperature and pressure during the production process and transmits it to the control system to adjust process parameters in time, preventing violent chemical reactions caused by parameter deviations.
  • Pharmaceutical Industry: Integrated into pharmaceutical production lines, especially in processes such as high-temperature sterilization and drug mixing. It accurately collects temperature and pressure signals in the production equipment to ensure each production link complies with GMP standards and avoids batch drug quality problems due to unstable process parameters.
  • Food Processing Industry: Used in large-scale food processing lines such as beverage filling and dairy product sterilization. It monitors temperature, pressure and other parameters in the processing process. It ensures food safety by preventing unqualified products caused by excessive temperature or other abnormal conditions and maintains the stability of the production process.
  • Automotive Manufacturing Industry: Applied in automated production lines for automotive parts processing and vehicle assembly. It collects signals from sensors on processing equipment such as stamping machines and welding robots. It realizes real-time monitoring of equipment operating status, timely finds abnormal operation of equipment, and ensures the continuity and safety of the production line.