Triconex 3481 Analog Output Module - Image 1

Triconex 3481 Analog Output Module - Image 2

Triconex 3481 Analog Output Module

Technical Specifications

Output and Signal Parameters
- It has 4 common – return, DC – coupled output channels, with a 12 – bit resolution and an output accuracy of less than 0.25% of the full – scale range within the 4 – 20mA controlled current range.
- The output current can reach an over – range of 0 – 22mA and also has a 0mA output capability, with a step function response time of less than 2ms.
- The typical switch time when a channel fails is 1ms, and the maximum switch time does not exceed 3ms.
Power and Loop Parameters
- The nominal external loop power supply is 24V DC, and the maximum allowable voltage is 32V DC, with reverse voltage protection.
- For a 300Ω load, the loop power supply needs to be over 16V DC with a minimum current of 1A; for an 800Ω load, the loop power supply must be over 28V DC with a minimum current of 1A.
- It has continuous over – range protection against 36V DC and 0V DC, which effectively protects the internal circuitry from damage due to abnormal voltage.

Category: Triconex

Description

- Physical and Environmental Parameters
  - The module weighs 2.27 kilograms. Its compact structural design facilitates integration into existing Triconex safety system cabinets.
  - Its operating temperature range is -40°C to 70°C, and it can operate normally in an environment with 0% – 95% relative humidity without condensation. It has excellent resistance to electromagnetic interference and can maintain stable performance in harsh industrial electromagnetic environments.
Functional Features
- Triple Modular Redundancy Ensures Fault Tolerance
  - Each module is equipped with three isolated electronic channels, each independently receiving data from the corresponding main processor. The voting circuit selects the valid signal for output, and non – output channels are shunted to avoid affecting the output results. Even if one channel malfunctions, the other two channels can seamlessly take over, ensuring continuous and stable output of control signals.
- Precise Output Guarantees Control Accuracy
  - Within the common 4 – 20mA industrial control current range, the module maintains an output accuracy of less than 0.25%. The 12 – bit resolution makes the analog signal output more detailed and smooth. This high – precision performance ensures that field actuators can execute control commands accurately, optimizing the stability of industrial production processes.
- Powerful Diagnostic Function Simplifies Maintenance
  - The built – in forced – switch diagnostic function enables real – time monitoring of the module’s operating status. It can promptly detect potential faults in internal circuits and output loops, and send fault alerts to the upper – level system. This allows maintenance personnel to quickly locate and address problems, significantly reducing the time and difficulty of troubleshooting.
- Flexible Power Adaptability Fits Diverse Scenarios
  - It is compatible with a wide range of load and loop power supply combinations. It can match different load resistances from 300Ω to 800Ω by adapting to different power supply voltages. This flexibility enables the module to be integrated into various industrial control loop configurations without requiring extensive modifications to the existing power supply and load systems.
Application Scenarios
- Oil and Gas Industry
  - On offshore drilling platforms and onshore refineries, it is used to control emergency shut – off valves and flow control valves in oil and gas pipelines. When the system detects abnormal pressure or leakage, it outputs precise analog signals to quickly adjust the valve opening or close the valves completely, preventing the spread of dangerous situations.
  - In long – distance oil and gas transmission systems, it coordinates with flowmeters and pressure sensors to regulate the operating state of pipeline regulators. It maintains stable pressure and flow in the pipelines through continuous and precise analog signal output, ensuring the safe and efficient transportation of oil and gas.
- Chemical Industry
  - In chemical plants producing flammable and explosive materials, it is integrated into reactor control systems. It controls the actuators of feeding and temperature – control devices. By precisely adjusting the 4 – 20mA signals, it regulates the feeding rate and reaction temperature of the reactor, avoiding dangerous reactions caused by process deviations.
  - In chemical material mixing and batching processes, it drives flow control valves for various raw materials. It ensures the accuracy of the mixing ratio of chemical raw materials through high – precision output signals, which is crucial for ensuring the quality of chemical products and the safety of the production process.
- Power Industry
  - In thermal power plants, it is applied to the control systems of boilers and steam turbines. It controls the actuators of steam pressure regulating valves and feedwater valves. It adjusts the steam output and feedwater volume in real time according to the load changes of the power generation system, ensuring the stable operation of the power generation equipment.
  - In nuclear power plants, it is used in the reactor coolant circulation control system. It controls the regulating valves of the coolant loop, maintaining the stability of the reactor’s operating temperature and pressure by precisely adjusting the flow rate of the coolant, thus guaranteeing the safety of the nuclear power generation process.
- Pharmaceutical and Metallurgical Industry
  - In pharmaceutical production lines with strict process requirements, it controls the actuators of raw material delivery pumps and concentration regulators. It ensures the precise control of parameters such as the delivery volume of raw materials and the concentration of pharmaceutical solutions, meeting the strict compliance requirements of pharmaceutical production.
  - In iron and steel metallurgical plants, it is integrated into blast furnace and converter control systems. It regulates the actuators of oxygen supply valves and material feeding mechanisms. It adjusts the oxygen supply amount and feeding speed according to the smelting temperature and furnace pressure signals, maintaining the stability of the smelting process and improving the quality of molten steel.

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