TRICONEX 2351 – TMR Safety System Module for Critical Control And Shutdown

You might notice that TRICONEX 2351 modules most often show up where downtime is costly and safety loops must stay deterministic. Typical scenarios:

• Emergency Shutdown (ESD) in upstream and midstream oil & gas

• Fire & Gas (F&G) detection and mitigation systems

• Burner Management Systems (BMS) for boilers, heaters, and furnaces

• Turbomachinery protection and control in refineries and power plants

• High-integrity pressure protection (HIPPS) and critical interlocks in chemical processing

• Reliability that reduces nuisance trips – The TMR design and diagnostics seem to minimize spurious shutdowns, which saves time and money.

• Compatibility with existing Tricon assets – Protects your installed base and typically allows staged upgrades without a wholesale rip-and-replace.

• Serviceability – Hot?swap and straightforward card replacement help maintenance technicians keep the plant online.

• Total cost of ownership – Long lifecycle support and widely available spares simplify inventory planning and reduce obsolescence risk.

• Engineering efficiency – Works with TriStation 1131 toolsets to speed configuration, proof testing, and troubleshooting.

• Cabinet and environment – Install in a Tricon chassis within a clean, ventilated control cabinet (often 19-inch), keeping ambient temperature and humidity within the module’s rated range.

• Wiring and grounding – Maintain proper shield terminations, separation of power and signal wiring, and a solid protective earth. Follow Triconex grounding and EMC practices.

• Handling – Observe ESD precautions. Use keyed slots to avoid incorrect placement; do not force insertion.

• Hot?swap practice – If replacing online, verify voting health, bypass or override per site procedure, and document the swap in the maintenance log.

• Routine checks – Schedule proof testing intervals aligned with your SIFs, run diagnostic reports, clean dust from vents, and verify firmware/logic versions with TriStation before and after changes.

Field feedback from a refinery turnaround last year: “We swapped a 2351 card during a window with no process interruption. Diagnostics flagged the issue early, so planning was straightforward.” That’s typically how these modules earn their keep—quietly preventing surprises.

• IEC 61508 SIL3 capable at the system level when deployed in a certified Tricon configuration

• CE marking and industrial EMC compliance (typical for Triconex modules)

• UL/CSA industrial control equipment listings, where applicable

• Manufacturer’s warranty: typically 12 months from shipment; extended service options available through authorized channels

• Tricon main processor/controller modules (for logic execution and networking)

• Tricon chassis and power supply units

• External Termination Assemblies (ETAs) and field wiring accessories

• TriStation 1131 engineering software for configuration, testing, and maintenance