TRICONEX 4351B

Description

• Model:​ 4351B
• Manufacturer:​ TRICONEX (Schneider Electric)
• Product Type:​ TCM Triple Redundant Safety Communication Module
• Compatible System:​ Tricon V10.0 and above TMR SIS
• Serial Interfaces:​ 4 × RS-232/RS-422/RS-485 universal serial ports (DB9)
• Ethernet Interfaces:​ 2 × 10/100M adaptive RJ45 ports (fiber optional)
• Serial Speed:​ Up to 115.2 Kbps per port; aggregate 460.8 Kbps across four ports
• Supported Protocols:​ Modbus RTU/TCP, TriStation, TSAA, SNTP, UDP/IP, Trimble GPS
• Port Isolation Voltage:​ 500 VDC channel-to-channel electrical isolation
• Internal Memory:​ 1 MB RAM, 4 MB Flash program storage
• Communication Processor:​ Dedicated 32-bit communication CPU
• Safety Certification:​ IEC 61508 SIL 3, TÜV certified
• Power Input:​ 24 VDC ±10%
• Power Consumption:​ ≤5 W
• Operating Temperature:​ -40 °C to +70 °C
• Physical Dimensions:​ 275 mm × 128 mm × 36 mm
• Weight:​ 3.18 kg
• Mounting:​ Tricon standard rack, hot-swappable, error-proof keying
• Protection Rating:​ IP20 (control cabinet installation)

• Dedicated 32-bit communication processor offloads all protocol conversion from the main safety CPU, ensuring ESD and F&G logic scan times are never affected by communication load
• Four independent electrically isolated serial ports allow simultaneous polling of multiple protection relays, vibration monitors, and PLCs
• Dual Ethernet ports support Modbus TCP, SNTP, TSAA multicast, OPC, and TriStation host communication for DCS integration, historian upload, and peer-to-peer Tricon controller linking
• Port 1 dedicated for Modbus and Trimble GPS clock synchronization; Port 4 for TriStation local engineering downloads
• Built-in 1 MB RAM and 4 MB Flash for message buffering and firmware storage
• Front panel indicators: PWR (backplane power), OK (TMR voting healthy), FAULT (communication/hardware fault), ETH1/ETH2 (Ethernet activity), PORT1–PORT4 (serial activity)
• Hot-swappable with anti-misinsertion mechanical keying
• 500 VDC port-to-port isolation prevents a single external link fault from disturbing other channels or the safety computation

• Petrochemical and oil refinery ESD/F&G system communication gateways
• Offshore oil platform safety instrumented system networking
• Thermal power plant turbine protection system data exchange
• Integration of Tricon SIS with DCS, SIS historian servers, and operator workstations
• Cross-system interlock signal exchange between multiple Tricon controllers
• GPS time synchronization for event sequence recording across safety systems
• Any SIL 3 safety application requiring high-bandwidth, multi-protocol external communication

• Install in a Tricon V10.0 or higher main chassis with proper backplane engagement
• Verify 24 VDC ±10% power supply with adequate current capacity
• Configure serial port mode (RS-232/422/485) via baseplate wiring per port requirement
• Connect Ethernet ports to the appropriate network segments with correct IP addressing
• Ensure control cabinet ambient temperature remains within -40 °C to +70 °C
• Properly ground the rack to leverage 500 VDC port isolation benefits
• Use TriStation 1131 for module configuration and firmware management

• The module’s dedicated 32-bit CPU means communication traffic will never impact the safety logic scan cycle
• Serial ports are independently isolated — a fault on Port 1 cannot propagate to Port 2, 3, or 4
• Only install in Tricon V10.0 or higher systems — earlier versions are not supported
• The FT FAULT LED indicates communication, hardware, or backplane faults and should be investigated immediately
• Replacement modules must run firmware compatible with the host Tricon system version
• GPS time synchronization via Port 1 requires a Trimble-compatible GPS receiver