Triconex AI3351S2 high‑density analog input module with TMR triple modular redundancy, 32‑channel 4‑20mA, SIL3 certified for ESD and safety instrumented systems.

Product Overview

• Part No: AI3351S2
• Brand: TRICONEX
• Category: TMR Analog Input Module

• AI3351S2 is a high‑density analog input module for Tricon triple‑modular‑redundant safety instrumented system. It acquires 4‑20mA analog signals from field transmitters for pressure, temperature, flow and level measurement. Adopting 2‑out‑of‑3 voting logic, it provides fault‑tolerant signal conversion for safety‑critical loops. Widely deployed in ESD, fire & gas protection for petrochemical, oil‑gas and power plant safety applications.

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Core Features

• • 32‑channel commoned analog input for 4‑20mA field transmitters
• • Triple Modular Redundant (TMR) architecture with hardware voting
• • SIL 3 safety certification for safety‑instrumented‑system application
• • Comprehensive channel and module self‑diagnosis with fault reporting
• • Hot‑swap capable for online replacement without system shutdown
• • High noise immunity for heavy‑duty industrial environment

• • Front‑panel LED status indicators for module and channel diagnostics

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Technical Specifications

• • Input Signal: 4‑20 mA DC, operational range 2‑22 mA DC
• • Channel Quantity: 32 points commoned
• • Resolution: 12‑bit A/D conversion
• • Input Bandwidth: 16 Hz (‑3dB)
• • Safety Level: SIL 3
• • Mounting: Tricon chassis slot installation
• • Protection Class: IP20
• • Operating Temperature: 0℃ ~ +60℃

• • Application: ESD system, fire & gas monitoring, process safety interlock

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Compatibility

• Fits Tricon TMR safety controller chassis and backplane
• Matches with terminal block assemblies 2351 / 2352
• Works with Trident safety software for configuration and monitoring