Triconex 4351B Key features
Triple Modular Redundancy ensures uninterrupted communication under fault conditions
Multiple serial and Ethernet interfaces support versatile network topologies
Strong isolation (500 V DC) protects against electromagnetic interference
Supports a wide range of industrial and time protocols including Modbus, SNTP, JetDirect
Field-replaceable while controller remains online
Performance comparison
Parameter | 4351B | 4352A/B | 4353/4354 |
Copper Ethernet | 2 × 10/100 Mbps | None | 2 (4353) |
Fiber Ethernet | Optional 2 × 100 Mbps | 2 × 100 Mbps | 2 × 100 Mbps |
Serial Ports | 4 | 4 | 4 |
Protocol Support | TriStation, Modbus… | Same protocols | Adds embedded OPC |
Summary:
Triconex 4351B serves as the main communication module within Tricon TMR safety systems. It bridges controllers, operator stations, Modbus devices, and host networks via serial and Ethernet, supporting fault-tolerant, secure control communications across industrial environments.
Typical cooperation cases
North America – Petrochemical Safety Control
Used to connect Tricon controllers with Modbus devices and operator stations; TMR ensures system remains functional when nodes fail.
Europe – Power Generation Network Integration
Bridged main controllers and distributed turbines, synchronizing time via SNTP across Ethernet and serial ports.
Asia – Refinery Data Acquisition
Deployed to gather sensor and alarm data via mixed networks, integrating TriStation with Ethernet telemetry.
Australia – Offshore Platform Communication
Installed onboard platforms to provide robust serial and Ethernet communication under harsh maritime conditions.
