Original Triconex 4351B TCM communication module, multi‑port interface for Tricon safety instrumented system.

Product Overview

Triconex 4351B is TCM communication interface module for Tricon SIS safety system, compatible with TMR triple modular redundant architecture. Equipped with multiple serial and Ethernet ports, it supports Modbus, TCP/IP and other protocols, realizing data interaction between Tricon controller, TriStation workstation, DCS and third‑party equipment. Widely used as maintenance spare part for petrochemical, oil‑gas and power plant safety control systems

Key Features

• Multi‑port design: 4×RS‑232/RS‑485 serial ports, 2×10/100Base‑T Ethernet ports
• Supports Modbus master/slave, TCP/IP, TSAA, SNTP multiple industrial communication protocols
• Built‑in communication link diagnosis and LED status indicator
• Hot‑swappable design for online replacement without system shutdown
• 500V port isolation to improve anti‑interference capability

• Complies with IEC 61508 SIL3 safety standard for safety‑critical applications

• 
  

Technical Specifications

• Brand: Triconex (Schneider Electric)
• Model: 4351B
• Module Type: TCM Communication Module
• Serial Interface: RS‑232 / RS‑485 DB‑9
• Ethernet Interface: 10/100 Base‑T RJ45
• Isolation Voltage: 500V
• Safety Level: IEC 61508 SIL3
• Communication Protocols: Modbus, TCP/IP, TSAA, SNTP
• Operating Temp: 0℃ ~ +60℃
• Storage Temp: ‑40℃ ~ +85℃
• Humidity: 5‑95% non‑condensing

• Installation: Tricon rack mount

• 
  

Compatibility

Compatible with Tricon series SIS chassis and matching processor modules. Related communication parameter configuration is required after module replacement.