Triconex 4351B Tricon Communication Modules 100% Brand NewTriconex 4351B Communication Module Specifications Serial Ports: Equipped with 4 RS 232 RS 485 ports using DB 9 connectors. Network Ports: Features 2 10 100BaseT Ethernet ports with RJ 45 connectors (Models 4351A, 4351B, 4353). Additionally, it has 2 fiber optic mode Ethernet ports with MT RJ connectors and 62. 5 125 um fiber cables (Models 4352A, 4352B, 4354). Port Isolation: Provides 500 VDC isolation. Protocols Supported: TriStation Modbus TCP IP