Triconex 3721 Key features
Triple Modular Redundancy guarantees high safety and fault tolerance
Programmable resolution adapts to different precision requirements
Fast update rate supports real-time process control
High isolation prevents crosstalk and enhances signal integrity
Robust design certified for harsh industrial environments
Performance comparison
Parameter | 3700A | 3721 | 3723E |
Input Range | 0–5 V differential | 0–5 V or ±5 V differential | Thermocouple / RTD |
Channels | 32 | 32 | 8 |
Resolution | 12-bit | 12/14-bit programmable | 16-bit |
Application Focus | General analog sensing | High-precision analog | Temperature sensing |
Summary:
3721 offers balanced channel count and precision. Model 3700A provides similar accuracy with more voltage ranges, while 3723E supports thermocouples and RTDs for versatile sensing.
Typical cooperation cases
North America – Refinery Emergency Shutdown
Used in fire-and-gas loops to capture critical analog values for shutdown logic; diagnostics supported quick fault resolution.
Europe – Chemical Reactor Control
Deployed in reactor temperature monitoring for precise control and safety interlocks; update rate ensured timely fault detection.
Asia – Power Plant Turbine Feedback
Implemented for turbine vibration and pressure sensor input to safety systems; redundancy supported continuous operation.
Australia – Offshore Oil Platform
Installed for flowmeter and valve position analog feedback in corrosive environments; robust design ensured long-term reliability.
