Description
Product Overview
The AI 3351S2 Analog Input Module from Triconex delivers high-integrity signal acquisition for safety-critical environments. Built for Tricon Systems, this module uses triple-redundant channels to independently measure and process analog inputs.
Each channel in the AI 3351S2 stores values in separate tables and transmits them to Main Processors via dedicated I/O buses. This architecture ensures continuous operation even during multiple component failures.
The module applies mid-value selection logic through the TriBus network. In TMR mode, it uses median values for reliability; in duplex mode, it averages inputs for balanced performance. Engineers value the AI 3351S2 for its automatic calibration and lifetime stability.
Its 500ms fault detection identifies stuck-at faults and accuracy deviations quickly. Self-test circuitry continuously verifies signal integrity and compensates for drift, maintaining SIL3 compliance.
Technical Specifications
| Parameter |
Specification |
| Model Number |
AI 3351S2 |
| Manufacturer |
Triconex |
| Product Range |
Tricon Systems |
| Module Type |
Analog Input Module |
| System |
DCS |
| Architecture |
Triple-Modular Redundant (TMR) |
| Signal Processing |
Asynchronous sampling, mid-value logic |
| Fault Detection |
500ms stuck-at and accuracy check |
| Calibration |
Automatic, lifetime stability |
| Certifications |
IEC 61508 SIL3, ATEX, cULus |
| Operating Temp. |
-40°C to 70°C |
| Dimensions |
4.3 × 18.8 × 21.8 cm |
| Weight |
1.3 kg |
| HS Code |
8537101190 |
| Communication |
Ethernet Router |
| Condition |
Brand New |
| Lead Time |
In Stock |
| Minimum Order |
1 Unit |
| Origin |
USA |
| Discontinued |
Active |
Applications & Compatibility
The AI 3351S2 supports Tricon controllers and suits:
-
Temperature, pressure, and flow monitoring
-
Safety Instrumented Systems (SIS)
-
Oil & gas, chemical, and power generation facilities
-
Duplex and TMR configurations
