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+86 18030182217
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Triconex 3351S2 Analog Input Module
Product Overview
The Triconex 3351S2 is a high-integrity analog input module engineered for safety-critical industrial automation systems, delivering precise signal conditioning and fault-tolerant performance. As a core component of the Triconex Trident Safety Instrumented System (SIS), this module is certified for SIL 3 applications under IEC 61508:2010, making it ideal for emergency shutdown systems, process monitoring, and turbine control in oil & gas, petrochemical, and power generation industries.
Featuring 32 differential analog input channels with a common reference point, the Triconex 3351S2 supports current-loop signals (4–20 mA DC) and offers 12-bit resolution with ±0.15% full-scale accuracy. Its advanced signal conditioning circuitry ensures minimal noise interference, even in electrically noisy environments. The module’s rapid scan time (<1 ms for all channels) and mid-value selection algorithm under Triconex’s Triple Modular Redundancy (TMR) architecture guarantee real-time data integrity, critical for maintaining process continuity in high-risk operationsse.com.
Integrated with Triconex’s Total Fault Management (TFM) technology, the Triconex 3351S2 continuously monitors channel health and provides diagnostic feedback for predictive maintenance. Its hot-swap capability allows online replacement without disrupting system operation, reducing downtime during servicing. With a compact form factor and compatibility with Triconex’s Trident chassis, this module simplifies integration into existing distributed control systems (DCS) while adhering to global certifications (CE, UL, FM, CSA).
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | Triconex 3351S2 |
| Manufacturer | Triconex |
| Product Type | Analog Input Module |
| Input Type | 4–20 mA DC current loop (commoned) |
| Number of Channels | 32 |
| Resolution | 12-bit |
| Accuracy | ±0.15% of full scale (25°C) |
| Scan Time | <1 ms for all channels |
| Isolation | 500 VDC (functional to protective earth), 800 VDC (functional to functional earth) |
| Overvoltage Protection | 33 VDC continuous |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -40°C to +100°C |
| Power Supply | 24 VDC ±15% |
| Dimensions | 49 cm (height) × 45 cm (width) × 5.8 cm (depth) |
| Weight | 2.9 kg |
| Certification | SIL 3 (IEC 61508:2010), CE, UL, FM, CSA |
Main Features and Advantages
SIL 3 Certification and TMR Architecture: The Triconex 3351S2 leverages Triconex’s proven TMR technology, ensuring fault tolerance and compliance with the highest safety standards. Each channel independently processes signals, with a mid-value selection mechanism to eliminate single points of failurese.com.
High-Speed Signal Acquisition: With a scan time of <1 ms for all 32 channels, the module enables real-time monitoring of critical process variables, reducing response latency in emergency scenarios. Its 12-bit resolution captures 细微 variations in pressure, temperature, or flow, supporting proactive decision-making.
Comprehensive Diagnostics: Built-in self-testing and fault detection mechanisms monitor channel integrity, providing actionable insights for predictive maintenance. Fault indicators and chassis alarms alert operators to issues, minimizing unplanned downtime.
Hot-Swap Capability: The module supports online replacement without system interruption, a critical feature for industries where even brief outages can lead to significant losses. This capability enhances maintenance efficiency while maintaining system availability.
Wide Compatibility: Designed for seamless integration with Triconex’s Trident chassis and external termination panels (ETPs), the Triconex 3351S2 works with industry-standard communication protocols like Modbus RTU, simplifying integration into complex control networks.
Application Areas
The Triconex 3351S2 excels in safety-critical applications across industries requiring high-integrity control systems:
- Oil & Gas: Deployed in offshore platforms and refineries to monitor pipeline pressure, wellhead flow rates, and compressor performance, ensuring safe operation and compliance with environmental regulations.
- Chemical Processing: Used in reactor monitoring and distillation columns to maintain precise control over chemical reactions, preventing hazardous overpressurization or temperature excursions.
- Power Generation: Monitors turbine vibration, boiler water levels, and generator parameters in thermal power plants, enabling early detection of anomalies to avoid catastrophic failuresse.com.
- Pharmaceuticals: Ensures compliance with sterile manufacturing standards by accurately measuring environmental conditions (e.g., humidity, particle counts) in cleanrooms.
In each scenario, the Triconex 3351S2’s combination of SIL 3 certification, TMR redundancy, and rapid signal processing makes it a preferred choice for applications where human safety and asset protection are paramount.
Related Products
- Triconex 3721: High-density analog input module with 32 differential channels, optimized for voltage measurements in SIL 3 systems.
- Triconex 3401S2: Digital output module supporting 32 points with SIL 3 certification, ideal for fail-safe actuation of valves and motors.
- Triconex 3481S2: Communication module enabling integration with Modbus RTU/TC and other industrial protocols.
- Triconex 3009X: Main processor module for executing control logic and coordinating I/O modules in Trident systems.
- Triconex 8310: Power supply module ensuring reliable energy distribution to chassis components.
- Triconex 3635R: Relay output module for non-critical applications requiring normally closed contacts.
These products complement the Triconex 3351S2 in building scalable, high-integrity safety systems.
Installation and Maintenance
Installation Preparation:
Ensure the Trident chassis is powered off and properly grounded before installation. Verify compatibility with the Trident backplane and external termination panel (ETP). Use Triconex’s TriStation 1131 software to configure input ranges, resolution, and diagnostic thresholds. The module’s keyed design prevents misalignment in the chassis, ensuring secure connections.
Ensure the Trident chassis is powered off and properly grounded before installation. Verify compatibility with the Trident backplane and external termination panel (ETP). Use Triconex’s TriStation 1131 software to configure input ranges, resolution, and diagnostic thresholds. The module’s keyed design prevents misalignment in the chassis, ensuring secure connections.
Maintenance Recommendations:
Regularly inspect the Triconex 3351S2 for physical damage or loose connections. Utilize the module’s diagnostic LEDs and TriStation software to monitor channel health. For faulted channels, perform hot-swap replacement using a certified spare module to maintain system continuity. Schedule annual calibration checks to ensure accuracy remains within ±0.15% of full scale.
Regularly inspect the Triconex 3351S2 for physical damage or loose connections. Utilize the module’s diagnostic LEDs and TriStation software to monitor channel health. For faulted channels, perform hot-swap replacement using a certified spare module to maintain system continuity. Schedule annual calibration checks to ensure accuracy remains within ±0.15% of full scale.
Product Warranty
The Triconex 3351S2 comes with a 1-year warranty covering defects in materials and workmanship. This includes free repair or replacement of faulty components, backed by a global network of Triconex-certified technical support. Customers receive access to detailed documentation, firmware updates, and 24/7 assistance to address operational challenges, underscoring the module’s reliability and the manufacturer’s commitment to long-term value.
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