Triconex 3700A Key features
Triple Modular Redundancy ensures fail-safe operation
Full-channel diagnostics with fault indication preserved under TMR
Hot-spare module replacement minimizes downtime
High-precision analog signal capture with fast update rates
Robust design certified for Class G3 harsh environments
Performance comparison
Parameter | 3700A | 3701 | 3703E |
Input Range | 0–5 V differential | 0–10 V differential | 0–5/0–10 V differential |
Channels | 32 | 32 | 16 |
Isolation | ≤1,500 V DC | ≤1,500 V DC | Yes |
Update Rate | 50 ms | 50 ms | 50 ms |
Summary:
Compared to other Tricon analog input modules, the 3700A provides mid-range channel count and update speed. Lower models (3701, 3703E) offer varied voltage ranges or density; the 3700A balances resolution, accuracy, and performance.
Typical cooperation cases
North America – Refinery Emergency Shutdown
3700A modules were used in fire and gas systems to monitor critical analog inputs, enabling reliable trip logic and event logging. Triple redundancy and diagnostics helped meet SIL 3 certification.
Europe – Chemical Plant Process Control
Installed in reactors and heaters for temperature control and safety interlocks. High accuracy and fast updates allow precise control and rapid fault detection.
Asia – Power Plant Turbine Feedback System
Used for monitoring turbine vibration and pressure sensors, feeding data back to safety controllers via fiber mesh networks. This boosted system reliability and maintenance planning.
Australia – Offshore Gas Platform Safety Rack
Integrated into safety racks to read analog values from valve positions and flow meters offshore. The rugged, certified design ensured consistent performance in harsh maritime environments.
