• Multi-protocol communication support: Modbus RTU/TCP, Ethernet/IP, OPC UA, and Triconex proprietary TriStation protocols for seamless system integration
• Redundant communication channels with automatic failover (<50ms) to ensure uninterrupted data transmission for safety-critical applications
• SIL 3 compliance (IEC 61508/61511) for safety instrumented systems, maintaining data integrity for safety-related signals
• 2500V AC galvanic isolation between communication ports and Triconex backplane to eliminate ground loops and electrical interference
• Real-time diagnostic monitoring (link status, packet loss, protocol errors) with event logging for troubleshooting and compliance documentation
• Hot-swappable design with mechanical keying for safe module replacement during system operation (zero downtime maintenance)
• Advanced EMI/RFI shielding (90dB attenuation) and surge protection (25kV ESD) for reliable operation in harsh industrial environments
• Secure data transmission with support for encryption (TLS 1.3) and access control lists (ACLs) to prevent unauthorized access
• Synchronization with Triconex TMR controllers (clock accuracy ±1µs) for time-stamped safety event logging and audit trails
• Compliant with global safety standards: IEC 61508 (SIL 3), ATEX, IECEx, UL 61010, and CE for international industrial applications

• Communication interface for Triconex SIS in oil & gas refinery Emergency Shutdown (ESD) and Fire & Gas (F&G) systems
• Data exchange between Triconex TMR controllers and DCS platforms in chemical plant reactor safety systems (SIL 3 compliant)
• Redundant communication link for offshore platform safety systems and onshore monitoring centers (ATEX/IECEx certified)
• Power generation plant turbine protection systems, connecting Triconex SIS to plant-wide SCADA/HMI systems
• Upgrades for legacy Triconex systems, replacing older communication modules with 4351B for enhanced protocol support
• Nuclear power plant auxiliary safety systems, ensuring secure data transmission for critical control functions
• Pharmaceutical manufacturing cleanroom safety systems, providing audit-ready communication logs for compliance
• Mining and metals processing SIS, connecting Triconex controllers to remote asset management systems
• Water and wastewater treatment plant safety systems requiring 24/7 redundant communication for chemical dosing control

• Any high-risk industrial application where loss of SIS communication could compromise process safety or regulatory compliance

TCM Specifications

Model Numbers:4351A，4351B，4352A，4352B，4353，4354

Serial Ports:4 RS-232/RS-485 ports,DB-9 connectors

Network Ports :0

Models 4351A，4351B.4353:210/100BaseT Ethernet ports，RJ-45 connectorsModels 4352A，4352B，4354:2 fiber-optic mode Ethernet ports,MT-RJ connectors with 62.5/125um fiber cables

Port Isolation:500VDC

Protocols Supported:

TriStation

Modbus

TCP/IP

ICMP

SNTP

TSAA(with support for IP Multicast)

Trimble GPS

Embedded 0PCServer(Models4353and 4354

Peer-to-Peer(UDP/IP)

Peer-to-Peer Time Synchronization

Jet Direct(network printing)

Modbus Functions Supported:办

01:Read Coil Status

02:Read Input Status

03:Read Holding Registers

04:Read Input Registers

05:Modify Coil Status

06:Modify Register Content

07:Read Exception Status

08:Loopback Diagnostic Test

15:Force Multiple Coils

16:Preset Multiple Registers

Communication Speed:

Copper Ethernet ports:10/100 Mbps(Model 4353 supports only 100 Mbps)Fiber Ethernet ports:100 Mbps

Serial ports:Up to 115.2 Kbps per port

QStatus Indicators:

PASS

FAULT

ACTIVE

FIRM

LINK:1 per network port

TX(Transmit):1per port

RX(Receive):1per port

For the relevant manual, please click to download and learn about the specific parameters

4351B.pdf