Redundancy: TMR architecture; redundant comm paths supported
Isolation Rating: 1500VAC (port-to-backplane)
Operating Temperature: 0°C to +60°C (industrial)
Certifications: SIL3, ATEX, IECEx, CE, UL
Hot-Swap: Supported (online replacement in redundant pairs)
Dimensions: 21mm × 405mm × 400mm
Weight: 2.3kg
The Real-World Problem It Solves
SIS/DCS communication gaps create blind spots during critical operations. Single-protocol cards lock you into one vendor; non-redundant comms drop safety data on a fault.Where you’ll typically find it:
Refinery ESD racks linking Tricon to Honeywell/Emerson DCS
Offshore F&G systems connecting to SCADA and historian servers
Power plant BMS/Turbine Protection communicating to OPC UA clientsThis TMR multi-protocol module eliminates comm single points, bridges legacy and modern systems, and keeps safety data flowing during faults.
Hardware Architecture & Under-the-Hood Logic
This is a TMR comm processor—three independent logic lanes voting on every packet. No external power; draws 5V from the Tricon backplane.
Backplane 5VDC feeds three isolated processor cores; each runs identical firmware.
Inbound Ethernet/serial data splits to all three cores; data validation and protocol parsing happen in parallel.
Voting logic compares outputs; majority vote determines final data passed to Tricon backplane.
Onboard diagnostics monitor lane health, link status, and packet errors; faults reported to Tricon diagnostics.
Front LEDs show Ethernet Link, Tx/Rx, and Module Fault status per lane.
Triconex 4400
Field Service Pitfalls: What Rookies Get Wrong
Mixing Redundant & Non-Redundant ConfigsTechs install one 4400 in a redundant rack. No failover; comms drop if the single module faults.
Field Rule: Always deploy 4400 in pairs for redundancy. Use identical firmware revisions on both modules.
Incorrect Serial Wiring & Ground LoopsRS-485 wired without shield termination or common ground. Noise causes garbled Modbus RTU and sporadic timeouts.
Quick Fix: Terminate RS-485 at both ends (120Ω). Connect shield to earth at one end only; keep signal ground isolated from chassis ground.
Firmware Mismatch with Tricon OSTechs load old firmware after replacement. Protocol handshakes fail; 4400 drops offline or causes backplane errors.
Field Rule: Match 4400 firmware to Tricon OS version (v9–v11). Update via TriStation; never mix firmware revisions in a rack.
Commercial Availability & Pricing Note
Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.
