Digital guide
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Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Triconex (a brand of Schneider Electric Industrial Automation) |
| Product Type | Analog Input Module |
| Product Number | 3351 |
| Nominal Input Current | 4-20 mA |
| Operating Current Range | 2-22 mA DC |
| Number of Input Channels | 32 (typical) |
| Input Bandwidth (3dB) | 16 Hz |
| Source Impedance | 180 Ω |
| Weight | 1.5 kg |
| Shipping Weight | 3 kg |
Functional Characteristics
- High Fault Tolerance:
- Triconex 3351 incorporates a Triple Modular Redundancy (TMR) design, featuring three identical sub-circuits that execute independent control functions. This ensures continuous operation even in the presence of a single-point failure.
- Robustness and Durability:
- Designed to withstand harsh industrial environments, making it suitable for use in demanding applications.
- Modularity and Scalability:
- Supports up to 118 I/O modules (both analog and digital) and optional communication modules, allowing for flexibility and scalability in system design.
- Communication Capabilities:
- Offers versatile communication options, including the ability to connect to Modbus hosts and slaves, Foxboro and Honeywell distributed control systems (DCS), other Tricon systems in peer-to-peer networks, and external hosts over TCP/IP networks.
- Remote I/O Support:
- Capable of supporting remote I/O modules located up to 12 kilometers away from the main controller, reducing cabling requirements and costs.
- Programming and Debugging:
- Uses programming software based on the Windows NT system for control program development and debugging, simplifying system configuration and maintenance.
- Intelligent I/O Modules:
- Each I/O module contains three microprocessors, reducing the workload on the main processor and enabling advanced features such as output data voting, feedback loop voltage checks, and field wire diagnostics.
- Online Diagnostics and Repair:
- Provides comprehensive online diagnostics and repair capabilities, allowing for maintenance activities to be performed without interrupting the control process.
- Hot Standby Support:
- Offers hot standby support for I/O modules, providing a seamless failover mechanism during emergency situations.
Application Scenarios
The Triconex 3351 analog input module is typically used in safety instrumented systems (SIS) and process control systems where high levels of reliability and safety are paramount. These include, but are not limited to:
- Petroleum and Refining: For monitoring and controlling critical process parameters in refineries and petrochemical plants.
- Oil and Gas: In oil and gas processing facilities, where safety shutdown systems and process control are essential.
- Chemicals: For controlling and safeguarding chemical processes and reactions.
- Power Generation: In power plants, especially for turbine control and safety systems.
- Other Critical Industries: Any industry that requires highly reliable and fault-tolerant control systems, such as water treatment, steel production, and pharmaceutical manufacturing.
