The TRICONEX 4351B is a high-performance, fault-tolerant communication module designed for critical industrial control and Safety Instrumented Systems (SIS).
TRICONEX 4351B TMR Communication Module Overview The TRICONEX 4351B is a high-performance, fault-tolerant communication module designed for critical industrial control and Safety Instrumented Systems (SIS). Manufactured by TRICONEX (now a division of Schneider Electric, formerly Invensys Triconex), this module integrates Triple Modular Redundant (TMR) architecture with versatile communication capabilities, serving as a core bridge between TRICONEX safety controllers and external devices/systems. It enables stable data transmission and interoperability in harsh industrial environments, supporting multiple mainstream protocols to ensure seamless integration with existing control networks. Fully compliant with IEC 61508 SIL 3 standards, it is widely applied in oil and gas, petrochemicals, power generation, and other high-risk industries requiring reliable communication for mission-critical operations. Technical Specifications Brand & Manufacturer Produced by TRICONEX, a global pioneer in fault-tolerant safety control systems, now integrated into Schneider Electric. TRICONEX is celebrated for its TMR technology, which ensures exceptional reliability and zero single points of failure, accumulating billions of hours of failure-free operation in critical industrial scenarios. Model Number Model:4351B, part of the TRICONEX 4300 series of communication modules. The suffix "B" denotes an upgraded version with enhanced protocol compatibility and processing performance compared to the original 4351 model. It is also referred to as Invensys TRICONEX 4351B in legacy documentation, classified as a TMR-enabled communication module optimized for TRICON and Trident safety control systems. Physical Specifications Dimensions Adopting an industrial modular design consistent with TRICONEX standard modules, the standard dimensions are 175 mm × 114 mm × 32 mm (6.89 in × 4.49 in × 1.26 in). This form factor ensures seamless integration into TRICON system chassis, with minor dimensional variations possible across different production batches, but the aforementioned size is universally compatible with standard Triconex mounting structures. Weight Net weight is approximately 1.2 kg (2.65 lbs) without accessories, lighter than digital I/O modules due to its communication-focused hardware design. Transportation weight (including original packaging) is around 3.5 kg, with no lightweight variants reported as the module’s weight is optimized for TMR component integration. Mounting & Housing Designed for rack mounting in TRICON and Trident system chassis, fully compatible with standard Triconex baseplates. The housing features a dark blue industrial-grade aluminum alloy structure with an IP20 protection rating, effectively preventing dust intrusion and ensuring suitability for control cabinet installation. Ruggedized versions for harsh on-site environments are available with IP65 protection rating upon request. Core Features Triple Modular Redundancy (TMR) Architecture: Incorporates three independent output channels with 2-out-of-3 voting logic, eliminating single points of failure and ensuring uninterrupted operation for SIL 3-compliant applications. 32 Isolated Output Channels: Equipped with 32 commoned output channels using solid-state relays (SSR) or electromechanical relays, with optoelectronic isolation (1500 VDC minimum between channels) to prevent cross-interference and enhance noise immunity. Robust Protection Mechanisms: Features short-circuit, overload, and reverse voltage protection. Each channel supports a maximum continuous current of 2A and a 10ms transient surge current of 10A, with a typical voltage drop of <1.5 VDC to minimize power loss. Advanced Diagnostics: Integrates comprehensive self-diagnostic functions, including output stuck detection, field voltage mismatch alarm, channel health monitoring, and hardware fault diagnosis. Front-panel LEDs indicate individual channel status (on/off) and module health (normal/fault) for quick troubleshooting. Hot-Swappable Design: Supports online hot swapping without system shutdown, enabling maintenance and module replacement while maintaining production continuity, thus maximizing plant availability. High-Speed Response: Achieves a response time of ≤2 ms, ensuring rapid execution of control commands for time-critical safety applications such as emergency shutdown systems. Flexible Compatibility: Communicates with Tricon main processors via a high-speed backplane bus, supporting Modbus TCP/IP and TRIPLEX protocols for seamless integration into existing safety control systems.
interface *Output method: rear output *Fast Ethernet: 3 slots, each slot supports 8 ports, with optional optical and electrical options *Gigabit Ethernet: Provides 4 1000Base SFP slots *CONSOLE port: RS232 (RJ45) *Alarm port: 5.08mm spacing 3-pin Phoenix wiring terminal, 250VAC/220VDC 2 A cable *Twisted pair cable: 100m *Multimode fiber: 1310nm, 2km (100Mbps); 1310nm, 500m (gigabit) *Single mode fiber: 1310nm, 0-40km; 1550nm, 0-80km source *Input voltage: 110-220VDC/VAC, redundant input *Connection terminal: 5.08mm spacing 5-pin Phoenix wiring terminal *Power:<40W mechanical properties *Case: Aluminum model with fanless design *Protection level: IP30 *Installation method: 19 inch 1U rack type *Shell size: 440 mm * 44.5 mm * 370 mm (W * H * D), as shown in the attached image *Impact, vibration, and drop: meet the requirements of IEC61850-3 5.5 CM level *Weight: approximately 4.3kg
