Product Short Description
Product Introduction:
The TRICONEX 2351 is a triple modular redundant (TMR) digital output module engineered for the Tricon v9, v10, and v11 Safety Instrumented Systems (SIS). It converts logical instructions from the Tricon safety controller into high-integrity 24 VDC switching or pulse signals to drive critical final elements such as solenoid valves, small relays, alarm beacons, and motor enable circuits. It serves as the last line of defense in Emergency Shutdown (ESD), Fire & Gas (F&G), and Burner Management Systems (BMS).
Description
Technical Specifications:
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Output Channels: 16 channels, each with triple redundant (TMR) architecture
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Output Type: NPN transistor sinking output
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Rated Voltage: 24 VDC (operating range 20–30 VDC)
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Per-Channel Load Current: 0.5 A continuous, 1.0 A peak (<100 ms)
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Response Time: <1 ms turn-on/turn-off
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Max Pulse Frequency: 1 kHz
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Redundancy: 2-out-of-3 (2oo3) hardware voting
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Diagnostics: Per-channel short-circuit, overload, and open-circuit detection
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Safety Certification: IEC 61508 SIL 3, IEC 61511, API 670
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Operating Temperature: 0 °C to +60 °C
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Mounting: Standard Tricon I/O slot, hot-swappable
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Weight: Approximately 1.2 kg
Functional Features:
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Triple redundant architecture ensures no single point of failure can prevent a safe shutdown
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Channel-independent diagnostics report faults directly to the Tricon controller
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Hot-swappable design allows replacement without powering down the SIS
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Drives both switching and pulse-train outputs for flexible actuator control
Application Scenarios:
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Emergency shutdown systems in oil & gas, refining, and petrochemical plants
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Fire & gas detection and mitigation systems
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Turbine and compressor protection
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Burner management and boiler safety
Installation Requirements:
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Install in a properly grounded Tricon rack (e.g., 3721/3722/3723 base)
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Verify 24 VDC power supply stability before insertion
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Ensure correct mechanical keying to prevent mis-seating
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Only install within a controlled cabinet with adequate ventilation
Usage Notes:
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Never mix with analog input modules of similar numbering — hardware and firmware are incompatible
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Periodic review of diagnostic logs via TriStation 1131 is recommended
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Replacement modules must match the exact firmware revision of the running system
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