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TRICONEX AI3351 – 32-Channel Safety Analog Input Module
Product Overview
The TRICONEX AI3351 is a high-integrity 32-channel analog input module for TRICONEX triple redundant safety instrumented systems. It collects standard 4–20mA current signals from field sensors, performs high-precision analog-to-digital conversion and built-in fault diagnosis. It solves reliable signal acquisition requirements for SIL 3 safety-critical applications including ESD, F&G and process control, realizes stable data transmission between field devices and TRICONEX safety controllers, and maintains signal integrity under harsh industrial electromagnetic environments.
Technical Specifications — AI3351
| Parameter | Value |
|---|---|
| Product Model | AI3351 |
| Manufacturer | TRICONEX |
| Product Type | 32-Channel Safety Analog Input Module |
| Power | Backplane 5V DC, Max Power Consumption 3.5W |
| Communication / Protocol | TRICONEX system backplane bus |
| Operating Temperature | -20 °C to +70 °C |
| Mounting | TRICONEX safety system backplane slot mounting |
| Dimensions (HxWxD) | 188mm × 102mm × 217mm |
| Weight | Approx. 1.28 kg |
| Typical Interfaces | 32-channel field terminals, channel-to-channel isolation |
| Compliance | IEC 61508 SIL 3, 1500V RMS isolation, CE |
TRICONEX AI3351
Key Features and Benefits — AI3351
- Adopts 12-bit high-resolution ADC, ±0.15% full-scale accuracy, supports standard 4–20mA DC input.
- Integrated Force-to-Value (FVD) self-diagnosis function, real-time detection of open-circuit and short-circuit faults.
- <1ms total scan time for 32 channels, fast response for safety control loops.
- 1500V RMS galvanic isolation between field side and logic side, strong anti-interference performance.
- Compatible with triple modular redundant (TMR) architecture, meets strict safety requirements of process industries.
Related Models
- AI2351: 16-channel analog input module, compact version compatible with TRICONEX safety racks.
- AI2352: High-speed analog input module, matching AI3351 for distributed signal acquisition.
- DO3301: 32-channel safety digital output module, supporting matched control with AI3351.
- PI3351: Pulse input module, dedicated frequency/RPM signal acquisition for TRICONEX systems.
Installation and Maintenance — AI3351
- Insert module into standard TRICONEX safety backplane slots, ensure firm connector contact for power and communication.
- Wire field 4–20mA sensors to corresponding terminals following official wiring diagrams.
- Check front LED status indicators regularly to monitor channel operation and fault status.
- Support online diagnosis; faulty module can be replaced in safe system state without full system shutdown.
- Periodically clean terminals and connectors to avoid dust and corrosion affecting signal stability.
