TRICONEX 3623T Output module

Product Detailed Description

• Core Functionality: The 3623T module controls field devices (like solenoids, motor starters, lights, or alarms) by providing digital output signals. Its primary function within a safety system is to safely de-energize or energize outputs in response to safety logic, ensuring the plant reaches a safe state during abnormal conditions.

• Triple Modular Redundancy (TMR):

• The module has three identical, independent channels (A, B, C) that receive input from the Triconex processor.

• All three channels execute the same logic and drive their respective output circuits.

• A hardware voting mechanism continuously compares the outputs of the three channels. If one channel deviates, it is immediately identified, isolated, and the output continues correctly based on the agreement of the remaining two channels. This ensures "fault-tolerant" operation, meaning a single fault will not lead to a system trip or unsafe condition.

• This architecture provides a high level of integrity and availability, allowing the system to remain online even with a single module failure (Hot Spare functionality is also supported for online replacement).

• Supervised Digital Outputs: The module includes sophisticated online diagnostics that provide full fault coverage of the field circuit. It supervises the field wiring and load to detect:

• Loss of power or blown fuse in the field.

• Open or missing load (e.g., a disconnected solenoid).

• A field short resulting in the load being energized in error.

• A shorted load in the de-energized state.

• These diagnostics extend fault coverage beyond the module itself, ensuring that field problems are detected and annunciated.

• Isolation and Diagnostic Indicators: Each output point typically has individual diagnostic indicators (LEDs) for ON/OFF status, module status (PASS, FAULT, ACTIVE), and field alarms (POWER, LOAD). This provides clear visual feedback for troubleshooting.

• External Termination Panel (ETP) Requirement: All Supervised Digital Output modules, including the 3623T, require a separate External Termination Panel (ETP) with a cable interface to the Tricon backplane. This separates the field wiring from the sensitive control electronics and facilitates hot-spare replacement.

Product Parameters

(Note: Always refer to the official Triconex documentation for the precise and most up-to-date specifications.)

• Module Type: Supervised Digital Output (SDO)

• Redundancy: Triple Modular Redundant (TMR)

• Number of Points (Outputs): 16, commoned

• Nominal Voltage: 120 VDC

• Voltage Range: 90-150 VDC

• Maximum Voltage: 160 VDC

• Voltage Drop: < 1.5 VDC, typical (at rated current)

• Maximum Current Rating (per point): 0.8A

• Surge Current: 4A surge per 10 ms

• Minimum Required Load: 30 mA (for supervision functionality)

• Load Leakage: 4 mA maximum

• Fuses (on Field Termination): 1A fast-acting (on ETP)

• Point Isolation: 1500 VDC / 2500 VDC (depending on specific revision/testing)

• Diagnostic Indicators: 1 per point (ON/OFF), Module Status (PASS, FAULT, ACTIVE), Field Alarm (POWER, LOAD per point)

• Color Code: Steel Blue

• Power Module Load: < 10 watts

• Compatibility: Designed for Triconex Tricon systems (e.g., v9, v10, v11, Tricon CX). Requires an External Termination Panel (ETP).

• Operating Temperature: Typically 0°C to +60°C (32°F to +140°F), but refer to the system manual for specific environmental ratings of the chassis/rack.

Product Advantages

• Exceptional Safety and Reliability: TMR architecture provides unmatched fault tolerance, ensuring that a single component failure will not lead to an unsafe condition or system shutdown. This is crucial for critical applications.

• High Availability: The TMR design combined with hot-spare capability allows for module replacement online without interrupting plant operations, maximizing uptime and profitability.

• Comprehensive Fault Detection: Supervised outputs provide extensive diagnostics, detecting faults not just within the module but also in the field wiring (e.g., open circuits, short circuits, missing loads, power loss), ensuring complete fault coverage.

• Simplified Troubleshooting: Detailed diagnostic indicators and fault reporting simplify the process of identifying and resolving issues, reducing maintenance time.

• Robust Industrial Design: Built to withstand harsh industrial environments, ensuring long-term performance and reliability.

• Certified for Safety-Critical Applications: Meets stringent industry safety standards and certifications (e.g., IEC 61508 SIL 3 capability), making it suitable for Emergency Shutdown (ESD), Burner Management Systems (BMS), Turbomachinery Control (TMC), and Fire & Gas (F&G) systems.

Precautions

• System Compatibility: Ensure the 3623T module is compatible with the specific Triconex chassis, processor, and firmware version in use.

• External Termination Panel (ETP): The 3623T requires a specific external termination panel (ETP). Do not attempt to use it without the correct ETP.

• Field Wiring Lengths: Triconex strongly recommends performing compatibility testing before selecting the Model 3623T module for use in applications that have field wiring lengths over 328 feet (100 meters), cable that is not twisted pair, or atypical loads (e.g., smart devices, strobe lights, klaxons). The supervision circuitry might be affected by excessive cable capacitance or unusual load characteristics.

• Minimum Load Requirement: The 3623T (and other supervised DO modules) requires a minimum load current (30 mA) to function correctly and enable its supervision features. If the actual field load is below this, external resistors might be needed.

• Power Supply: Ensure the 120 VDC power supply to the module and field devices is stable and within the specified voltage range.

• Grounding: Proper grounding of the system, chassis, and field wiring is absolutely critical for safe and reliable operation and for effective noise immunity.

• Installation Environment: While robust, ensure the module is installed within the specified environmental limits for temperature, humidity, and vibration.

• ESD Protection: Always observe electrostatic discharge (ESD) precautions when handling Triconex modules.

• Qualified Personnel: Installation, configuration, and maintenance of Triconex systems should only be performed by personnel trained and certified on Triconex safety systems.

• Documentation: Always refer to the latest official Triconex manuals, datasheets, and safety advisories for detailed installation, operation, and maintenance instructions.

Product Applications

The TRICONEX 3623T module is specifically designed for safety-critical and high-availability applications in various heavy industries:

• Emergency Shutdown Systems (ESD): A core component for rapidly and safely shutting down processes or equipment in emergency situations (e.g., high pressure, high temperature, gas leaks).

• Burner Management Systems (BMS): Controlling the safe startup, operation, and shutdown of industrial burners and furnaces, preventing explosions and ensuring combustion safety.

• Turbomachinery Control and Protection (TMC): Providing overspeed protection, vibration monitoring, and sequencing control for critical turbines and compressors.

• Fire and Gas Systems (F&G): Initiating alarms and suppression actions based on fire or gas detection.

• High-Integrity Pressure Protection Systems (HIPPS): Preventing overpressure in pipelines and vessels by rapidly closing isolation valves.

• Reactor Safeguarding Systems: Ensuring safe operation and shutdown of chemical reactors.

• Offshore Oil & Gas Platforms: Used extensively for safety and process control in harsh marine environments.

• Pipelines: Overpressure protection and flow control in pipeline networks.

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