Description
Product Overview
The 4355X (TCM 4355X) is a Triconex (Schneider Electric) Tricon Communication Module, designed for Tricon MP / MP+ triple modular redundant (TMR) Safety Instrumented System (SIS). It acts as an offload communication gateway between the Tricon main processor and external systems including DCS, HMI, SCADA and third-party controllers. By handling all external multi-protocol communication separately, it protects the safety logic core from network disturbances. Widely used in oil & gas, chemical and power plant ESD and fire & gas safety systems.
Technical Specifications
| Item | Parameter |
|---|---|
| Manufacturer | Triconex (Schneider Electric) |
| Part Number | 4355X / TCM4355X |
| Product Type | TMR Safety Communication Gateway |
| Applicable System | Tricon MP / MP+ SIS Rack |
| Architecture | Triple Modular Redundancy (2oo3 voting) |
| Ethernet | 2 × 10/100 Mbps RJ45 ports |
| Serial | Isolated RS232 / RS485 interface |
| Supported Protocols | Modbus TCP, Modbus RTU, OPC server |
| Power Supply | 24 VDC from rack backplane |
| Operating Temperature | 0°C ~ +60°C |
| Humidity | 5%–95% non-condensing |
| Safety Certification | IEC 61508 SIL 3 capable |
| Mounting | Full-height plug-in rack card |
Key Features
- Full TMR triple circuitry matching the Tricon SIS platform; maintains safety integrity while processing external communications.
- Dual Ethernet plus isolated serial port for redundant network links to DCS and SCADA hosts.
- Offloads communication tasks from main CPU; external network faults will not impact safety logic execution.
- Built-in protocol conversion for bidirectional tag exchange between Tricon SIS and outside automation systems.
- Front panel status LEDs for module health, active/standby state and communication link diagnostics.
- Hot-swappable within powered Tricon rack for online maintenance without SIS shutdown.
- Comprehensive self-diagnostics for internal hardware faults and link failure detection.
Installation & Testing Notes
- Apply ESD protection during handling; static discharge can damage TMR logic and communication chips.
- Install only inside compatible Tricon MP / MP+ rack; confirm backplane 24VDC supply before insertion.
- After installation, verify module OK LED, configure network addresses and Modbus tag mapping via Tricon engineering software.
- Test communication paths on both Ethernet and serial ports; validate read/write data and alarm transmission to DCS.
- Check front edge connector for bent pins, oxidation or PCB damage before spare deployment.
- Confirm firmware revision compatibility with existing Tricon main processor firmware.
FAQ
Q: What is TCM 4355X used for? A: It is a dedicated communication gateway for Tricon TMR SIS, used to exchange safety data with DCS, HMI and SCADA systems.
Q: Is 4355X SIL3 rated? A: Yes, it is SIL3 capable as part of the complete Tricon TMR safety system.
Q: Can it be hot swapped? A: Yes, it supports hot swap in a fully redundant Tricon rack.
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