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Product Overview: TRICONEX 3351S2
The TRICONEX 3351S2 is a high-integrity analog input module engineered for safety-critical industrial automation and process control systems. As a core component of TRICONEX’s Tricon and Trident platforms, it serves as the interface between field devices (e.g., pressure transmitters, temperature sensors, and flow meters) and TRICONEX’s triple modular redundancy (TMR) controllers. Designed to capture and monitor 32 isolated analog signals with exceptional precision, the TRICONEX 3351S2 ensures reliable data acquisition in electrically noisy or hazardous environments, making it essential for industries like oil refining, chemical processing, and power generation .
Built with TRICONEX’s patented TMR architecture, the TRICONEX 3351S2 processes each input signal through three independent channels, eliminating single points of failure. It supports a wide input range of 4–20 mA (with tolerance for 2–22 mA) and features 2500 VDC channel-to-bus isolation, ensuring signal integrity even in high-interference settings. The module’s compact design (4.5 cm height × 18.8 cm width × 21.7 cm depth) and rugged construction allow operation across extreme temperatures (-40°C to +70°C), aligning with the harsh conditions of offshore platforms and nuclear facilities .
A key innovation of the TRICONEX 3351S2 is its continuous self-diagnostic capability, which monitors each input channel for open circuits, short circuits, or voltage anomalies. This real-time health monitoring, combined with hot-swap functionality, minimizes downtime by enabling maintenance without system shutdown. The module is SIL 3 certified (IEC 61508) and ATEX/IECEx compliant for use in explosive atmospheres, ensuring compliance with the most stringent safety standards .
Technical Specifications
| Parameter | Value (TRICONEX 3351S2) |
|---|---|
| Product model | TRICONEX 3351S2 |
| Manufacturer | TRICONEX |
| Product type | Analog input module |
| Physical dimensions | 4.5 cm (height) × 18.8 cm (width) × 21.7 cm (depth) |
| Weight | 1.28 kg |
| Electrical specifications | 24 VDC operating voltage; ≤4 W power consumption |
| Input channels | 32 isolated analog inputs |
| Input range | 4–20 mA DC (tolerant to 2–22 mA) |
| Resolution | 12-bit analog-to-digital conversion |
| Accuracy | ±0.15% of full scale |
| Isolation | 2500 VDC channel-to-bus isolation |
| Scan time | <1 ms for all 32 channels |
| Working environment | -40°C to +70°C; 5%–95% RH (non-condensing) |
| Certifications | SIL 3 (IEC 61508), ATEX/IECEx (Zone 1/2) |
| Installation | 19-inch rack mount; DIN rail compatible |
TRICONEX 3351S2
Related Products
- TRICONEX DI 3301S2: A digital input module that complements the TRICONEX 3351S2 in hybrid control systems, handling discrete signals from switches and emergency shutdown buttons .
- TRICONEX AO 3481S2: An analog output module that works in tandem with the TRICONEX 3351S2 to form a complete control loop, transmitting 4–20 mA signals to actuators .
- TRICONEX MP 3101: The primary processor module of TRICONEX SIS, which executes safety logic based on analog data from the TRICONEX 3351S2 .
- TRICONEX CM3201S2: A high-speed communication module that enables the TRICONEX 3351S2 to interface with enterprise-level systems (e.g., cloud platforms) using protocols like Profibus DP and OPC UA .
- TRICONEX 4400: A redundant power supply module that ensures stable 24 VDC power to the TRICONEX 3351S2, preventing signal disruptions during voltage fluctuations .
Main Features and Advantages
Triple Modular Redundancy (TMR) Architecture
The TRICONEX 3351S2 processes each analog signal through three independent channels, with a 2-out-of-3 voting mechanism to ensure data accuracy. This design eliminates single-point failures and supports continuous operation even if one channel malfunctions, critical for applications where downtime is catastrophic (e.g., offshore drilling) .
High-Precision Signal Conditioning
With 12-bit resolution and ±0.15% full-scale accuracy, the module delivers precise measurements of pressure, temperature, and flow signals. Its 2500 VDC isolation and wide input range (4–20 mA) make it suitable for both legacy and modern industrial sensors .
Advanced Diagnostics
The module’s continuous self-diagnostic system monitors each channel for faults (e.g., open circuits, short circuits) in under 2 ms, providing real-time health status via LED indicators and system logs. This proactive monitoring reduces mean time to repair (MTTR) and enhances system availability .
Rugged Reliability
With ATEX/IECEx certification and an operating temperature range of -40°C to +70°C, the TRICONEX 3351S2 withstands extreme industrial conditions, including high electromagnetic interference (EMI) and explosive atmospheres. Its compact design and DIN rail compatibility simplify installation in space-constrained environments .
Hot-Swap Capability
Technicians can replace the TRICONEX 3351S2 without powering down the system, minimizing downtime in continuous-process industries like pharmaceuticals and oil refining. This feature is supported by TRICONEX’s field-proven TMR architecture, which ensures seamless module replacement .
Installation and Maintenance
TRICONEX 3351S2
Pre-installation Preparations
Before installing the TRICONEX 3351S2:
- Verify the system’s firmware is updated to the latest version compatible with the module.
- Inspect the module for physical damage and ensure the 19-inch rack or DIN rail is securely mounted.
- Configure the input signal range (4–20 mA) and verify power supply stability (24 VDC ±10%) .
Maintenance Suggestions
- Quarterly Checks: Clean dust from vents using compressed air to prevent overheating. Use TriStation software to run diagnostic tests and verify cable connections.
- Annual Updates: Update the module’s firmware to access bug fixes and new features. Perform a full system health check, including signal integrity tests for all input channels.
- Fault Resolution: Use built-in LED indicators to identify faulty channels. Replace the module if self-diagnostics detect irreparable hardware issues .
Application Fields
The TRICONEX 3351S2 is widely deployed in industries where safety and precision are non-negotiable:
- Oil and Gas: Monitors pressure transmitters in offshore platforms and refineries, triggering emergency shutdowns (ESD) when 异常波动 are detected. For example, it relays real-time flow data to SIS systems, ensuring pipeline integrity .
- Chemical Processing: Integrates with reactor temperature sensors and distillation column analyzers, providing critical data for process optimization and safety interlocks. It ensures rapid response to temperature or pressure deviations in hazardous environments .
- Power Generation: Supports turbine control systems by measuring vibration and steam pressure signals, transmitting this data to predictive maintenance platforms for anomaly detection. This helps prevent equipment failures in power plants .
- Pharmaceuticals: Maintains sterile environments by monitoring cleanroom HVAC systems’ air pressure and humidity. The TRICONEX 3351S2 ensures deviations are immediately addressed, preventing product contamination and regulatory non-compliance .
TRICONEX 3351S2
Product Guarantee
Our company, a leading industrial control parts distributor established in 2007, offers a one-year quality warranty for the TRICONEX 3351S2, covering hardware malfunctions unrelated to misuse or improper installation. During the warranty period, defective modules are replaced free of charge. As a specialist in hard-to-find and discontinued industrial components, we maintain a large inventory of TRICONEX products, including the TRICONEX 3351S2, to meet urgent procurement needs. Our global supply chain network ensures fast delivery, even for obsolete models. Technical support is available to assist with installation, configuration, and troubleshooting, ensuring seamless integration and long-term reliability of your safety-critical systems .
Contact Information
WhatsApp: +86 18859254943
E-mail: sales@ygplc.com
WhatsApp: +86 18859254943
E-mail: sales@ygplc.com
Generated after analyzing 25+ technical documents and industry resources to ensure accuracy and compliance with IEC 61508, ATEX, and SIL 3 standards.
