Description
- Manufacturer: Schneider Electric (Triconex)
- Part Number: 4351B
- System Type: Tricon Triple Modular Redundant (TMR) System
- Network Interface: 100Base-FX Fiber Optic
- Communication Ports: 2 x Fiber Ethernet ports, 4 x Serial ports (RS-232/RS-485)
- Protocol Support: Modbus (RTU/TCP), TSAA, Peer-to-Peer, SNTP, and Net-1
- Transmission Rate: 100 Mbps (Ethernet), up to 115.2 Kbps (Serial)
- Fiber Connector Type: MT-RJ
- Function: Provides communication between Tricon controllers and external hosts (DCS/HMI)
- Isolation: Fiber optic isolation for EMI/RFI immunity
- Diagnostic Features: Comprehensive self-test and port-level status LEDs
The TRICONEX 4351B is a high-availability communication interface designed to facilitate deterministic data exchange within the Tricon TMR architecture. By utilizing fiber optic connectivity, the module ensures robust electrical isolation and prevents ground loops, making it ideal for safety-critical applications in high-interference environments. It allows the safety system to integrate seamlessly with plant-wide networks while maintaining the rigorous integrity levels required for Emergency Shutdown (ESD) and Fire and Gas (F&G) systems.

TRICONEX 4351B
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