TRICON AI3351 | Analog Input Safety Module

Technical Specifications

Key Features and Advantages

The AI3351 delivers triple-redundant signal processing with 99.999% diagnostic coverage, making it ideal for SIL 3 safety applications. Its adaptive noise cancellation technology eliminates ground loop interference while maintaining 0.02% measurement accuracy under ±10% power fluctuations.

Advanced self-monitoring: Features continuous channel integrity checks and predictive drift compensation. The module’s dual isolation barriers exceed ATEX Zone 2 requirements, providing explosion-proof safety in hazardous environments with IP67-rated front connectors.

Smart configuration: Supports HART 7 protocol pass-through for intelligent transmitters and automatic sensor validation. Hot-swappable design enables maintenance without process interruption, with OLED displays showing real-time diagnostics.

AI3351

Application Areas

In offshore oil platforms, the AI3351 monitors wellhead pressure transmitters and gas detection systems, ensuring IEC 61511 compliance for emergency shutdown scenarios. Its 5ms scan rate prevents overpressure incidents in separator vessels.

Nuclear power plants utilize this module for reactor coolant temperature monitoring, leveraging radiation-hardened components and <1μV noise performance. The extended temperature range supports passive safety systems during station blackouts.

Chemical processing facilities benefit from ATEX certification for corrosive environments, while the high channel density reduces cabinet space in API 670-compliant machinery protection systems.

Related Products

DI3351: 32-channel digital input module
AO3351: Analog output module with HART support
TMR3351X: Triple modular redundant processor
PSD3350: 24V DC redundant power supply
FCM3351: Profibus-DP communication gateway

Installation and Maintenance

Installation preparation: Use Belden 8761 shielded twisted pair cables for all AI3351 connections. Maintain 100mm separation from power cables and verify chassis grounding <0.1Ω. Configure input types via Triconex Safety Manager software before commissioning.

Maintenance recommendations: Perform annual calibration checks using certified 7.5-digit calibrators. Replace terminal blocks every 5 years or 20,000 insertion cycles. Always use ESD protection when handling modules in explosive atmospheres.

Product Assurance

The AI3351 undergoes MIL-STD-461G EMI testing and 2000-hour accelerated lifecycle validation. Schneider Electric provides SIL 3 certification packages and 24/7 critical support with 4-hour response SLA. The 5-year warranty includes firmware security updates and replacement modules shipped in climate-controlled packaging.