Description
TRICONEX 3720 Analog Input module
TRICONEX 3720 is a highly reliable analog input module and part of the Triconex series Safety Instrumented System (SIS). The detailed introduction is as follows:
Main Features
- High Reliability: Adopts Triple Modular Redundancy (TMR) design, which significantly enhances system reliability. It ensures the system can still operate normally in case of single-point failures, effectively improving system availability.
- High Precision: Features 12-bit or 14-bit programmable resolution, which can be set according to actual needs to meet application scenarios with different precision requirements.
- Flexible Configuration: Users can configure parameters such as input range, resolution, and sampling rate to adapt to different industrial field requirements.
- Modular Design: The modular feature makes the system easy to expand and maintain, facilitating adjustments based on changes in system scale during practical applications.
Technical Parameters
- Channel Quantity: Equipped with 32 analog input channels for simultaneous collection of multiple signals.
- Input Signal: Supports differential voltage signals of 0-5V or -5 to +5V.
- Overload Range: Strong overload capacity, up to +150%.
- Resolution: Programmable as 12-bit or 14-bit.
- Sampling Rate: The sampling rate is 10 milliseconds, enabling fast sampling of input signals to reflect signal changes in a timely manner.
- Point Isolation: Features high isolation to effectively prevent signal interference between channels.
Main Functions
- Data Acquisition: Collects analog signals from field sensors (e.g., temperature, pressure, flow sensors) to provide raw data for subsequent processing.
- Signal Conversion: Converts collected analog signals into digital signals for input to the control system, meeting the control system’s requirement for digital signals.
- Process Monitoring: Provides real-time process data to the control system, allowing operators to monitor the operational status of industrial processes in real time.
- Safety Interlocking: Integrates analog signals with safety interlocking functions. When abnormal signals are detected or preset safety thresholds are reached, it promptly triggers safety interlocking actions to control hazardous processes and ensure production safety.
Application Cases
Petrochemical Industry
In a large oil refinery, the TRICONEX 3720 module monitors and controls parameters of the atmospheric and vacuum distillation unit. By connecting temperature, pressure, and flow sensors, it real-time collects analog signals such as distillation column temperature, bottom pressure, and feed flow. After converting these signals into digital ones, they are transmitted to the control system for operators to grasp the unit’s status. When a parameter deviates from the set value, the system performs interlocking control based on preset logic—e.g., adjusting the opening of control valves to regulate flow or starting a standby cooling system to control temperature—ensuring safe and stable unit operation and avoiding production accidents and quality issues caused by abnormal parameters.
Power Industry
In a thermal power plant, the TRICONEX 3720 module is applied to the generator monitoring system, responsible for collecting analog signals such as stator temperature, rotor winding temperature, lubricating oil pressure, and cooling water flow. Through high-precision signal acquisition and conversion, it provides accurate data for the generator’s protection and control system. Once a parameter exceeds the safety threshold, the module triggers an alarm in a timely manner and collaborates with other related modules to implement interlocking protection actions like emergency shutdown, preventing generator damage caused by overheating, poor lubrication, etc., and ensuring reliable power supply.
Metallurgical Industry
In the steel rolling production line of a steel plant, the TRICONEX 3720 module plays a key role in monitoring critical operating parameters of the rolling mill, such as rolling force, roll gap temperature, and motor current. By real-time collecting these signals, the control system adjusts parameters like rolling speed and force according to actual conditions to ensure steel rolling quality. Meanwhile, when abnormal signals are detected, it quickly activates the interlocking mechanism to stop the rolling mill, avoiding equipment overload damage and improving production safety and efficiency.
Paper Industry
In a large paper mill, the TRICONEX 3720 module is used to control processes like pulp preparation and paper drying. In pulp preparation, it collects analog signals such as beating degree and concentration, adjusting the rotation speed of beating equipment and water addition based on these data to ensure pulp quality. In the paper drying process, by collecting signals like drying oven temperature and humidity, it controls the opening of steam valves and the operation of ventilation equipment to achieve precise control over drying, ensuring the paper’s dryness meets requirements and improving paper quality and production efficiency.
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