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Phone: +86 16626708626Description
Real-World Use & Application Scenarios
The TRICONEX 3351 is a high-reliability, fault-tolerant analog input module designed for safety-critical industrial automation applications. It is commonly used in industries such as oil and gas, power generation, petrochemicals, and manufacturing where precise acquisition of analog signals is essential for process safety and control.
This module collects analog signals from field devices, such as transmitters and sensors, allowing real-time monitoring of process variables like temperature, pressure, and flow. When integrated within triple modular redundant (TMR) safety systems, the 3351 supports mission-critical applications requiring SIL 3 certification, ensuring continuous, fail-safe operation.
It enables operators and control systems to maintain precise process control, reduce downtime, and promptly respond to safety events.
Product Introduction & Positioning
The TRICONEX 3351 analog input module provides 32 commoned input points, designed for high-density signal acquisition within Triconex safety systems. It features 16-bit resolution with an accuracy of ±0.1% of full scale, delivering precise analog measurements vital for tight process control.
- 3351
Operating over a wide temperature range from -40°C to +70°C, the module supports advanced diagnostics such as force-to-value diagnostics (FVD) and over-range protection up to 6%. It communicates seamlessly within ABB’s Triconex architecture, with hot-swapping capabilities supporting online system maintenance without shutdown.
Positioned as a versatile and reliable analog input module, the 3351 is suited for integration into control systems demanding high resolution, rapid data acquisition, and certified safety integrity.
Key Technical Features & Functional Benefits
The 3351 module offers 32 analog input channels with a nominal input current range of 4-20 mA DC and operational range extending from 2 to 22 mA. It supports fault-tolerant signal processing with diagnostic coverage exceeding 99%, reducing the risk of undetected failures.
Its 16-bit resolution ensures high precision and repeatability in analog measurements, critical for process optimization. The input bandwidth is 16 Hz, allowing it to accurately capture fast-changing process variables.
The module is built for harsh industrial environments with isolation levels reaching 500 V DC between functional and protective earth and 800 V DC between functional and logic earth, enhancing noise immunity and safety compliance.
Detailed Technical Specifications
| Parameter | Value |
|---|---|
| Model | TRICONEX 3351 |
| Manufacturer | Triconex (ABB) |
| Product Type | Analog Input Module |
| Number of Input Points | 32 (commoned inputs) |
| Input Signal Range | 4-20 mA nominal |
| Operational Current Range | 2-22 mA DC |
| Resolution | 16-bit |
| Accuracy | ±0.1% full scale |
| Input Bandwidth (3 dB) | 16 Hz |
| Diagnostic Coverage | >99% |
| Operating Temperature | -40°C to +70°C |
| Isolation Levels | 500 V DC (functional to earth) |
| 800 V DC (functional to logic earth) | |
| Safety Integrity Level | SIL 3 Certified |
Related Modules or Compatible Units
TRICONEX 3009 – Main processor module managing safety system operations.
TRICONEX 3504E – Digital input module complementing analog inputs for comprehensive signal acquisition.
TRICONEX 3481S2 – Analog output module for process variable control.
TRICONEX BC800 – Bus interface module facilitating data communications.
TRICONEX 2401 – Digital output module integrated into safety instrumented systems.
Installation Notes & Maintenance Best Practices
Ensure installation within certified control cabinets following ABB Triconex guidelines, with secure mounting, grounding, and shielding to guard against electrical interference. The module’s hot-swapping feature supports quick replacement without system downtime.
Maintenance includes diagnostic checks using Triconex management tools, verifying input signal quality and system status lights, and applying firmware updates as necessary to maintain optimal performance and compliance.
