TRICONEX 8311 Power supply

Product Detailed Description

• Functionality:

• Loss of power or blown fuse in the field circuit.

• Open or missing load.

• A field short causing the load to be energized in error.

• A shorted load when it should be de-energized.

• Receives voted digital output signals from the three Main Processors of the Triconex system.

• Acts as an interface between the Triconex controller and field devices, converting the internal logic signals into sufficient power to drive external loads.

• Provides output points (channels) that can be individually configured to be normally open (NO) or normally closed (NC), and to switch ON or OFF based on the safety logic.

• Many TRICONEX DO modules, particularly "Supervised Digital Output (SDO)" modules, incorporate advanced diagnostics (e.g., voltage and current loopback circuitry, Output Voter Diagnostics - OVD) to detect faults not only within the module itself but also in the field wiring and the load. This supervision can detect:

• Supports "de-energize to trip" philosophy, a common safety principle where a de-energized output indicates a safe state or a trip condition.

• Key Features (Common across most DO modules):

• Triple Modular Redundancy (TMR) Design: While the voting happens in the processor, the output switches on SDO modules often have a quadruplicated (2-out-of-4) architecture for extreme fault tolerance. This ensures that even if one element fails, the correct output signal is still passed to the field.

• Hot-Spare Capability: Supports hot-spare modules, allowing a faulty module to be replaced online without interrupting the process.

• Comprehensive Online Diagnostics: Extensive diagnostics monitor each output switch, field circuit, and load presence, providing high fault coverage and immediate fault reporting.

• Robust Isolation: Provides high isolation (e.g., 1500 VDC) between the field and internal logic to protect against electrical disturbances.

• Rugged Industrial Design: Built to withstand harsh industrial environments, often with high reliability components.

• External Termination Panels (ETPs): Typically requires separate external termination panels (ETPs) for field wiring, which simplifies wiring, maintenance, and allows for hot-swapping modules without disturbing field wiring.

• LED Indicators: Each output point usually has an LED indicator for its ON/OFF state. Modules also have status LEDs (PASS, FAULT, ACTIVE, LOAD) for quick visual diagnosis.

Product Parameters

TRICONEX DO modules come in various models (e.g., 3601E, 3603E, 3604E, 3611E, 3624, 3625, 3664) with different voltage ranges, point counts, and features. Here are common parameters, noting that specifics depend on the exact model:

• Nominal Output Voltage:

• 24 VDC (Most common, e.g., 3603E, 3625, 3664)

• 48 VDC (e.g., 3604E)

• 115 VAC (e.g., 3611E)

• 230 VAC

• Voltage Range: Varies based on nominal voltage (e.g., 16-32 VDC for 24VDC modules, 90-155 VAC for 115VAC modules).

• Number of Output Points: Typically 8, 16, or 32 points per module.

• Output Type:

• Transistor outputs (for DC modules)

• Relay outputs (for AC modules or specific DC applications requiring isolated relay contacts)

• Current Ratings (Maximum):

• Per point: Typically 0.5A, 1A, or 2A (continuous).

• Surge current: Higher values for short durations.

• Load Leakage: Typically low (e.g., < 4 mA max).

• Voltage Drop: Typically low across the output switch (e.g., < 2.8 VDC @ 1.7A for DC modules).

• Minimum Required Load: Some supervised modules might have a minimum load requirement for diagnostics to function correctly (e.g., 10 mA).

• Point Isolation: High isolation, typically 1500 VDC minimum between points and between points and chassis.

• Hot-Spare Support: Yes, most modules support hot-spare.

• External Termination Panel (ETP) Required: Yes, for field wiring.

• Operating Temperature: Typically 0°C to 60°C (32°F to 140°F).

• Certifications: TÜV certified up to SIL3 (Safety Integrity Level 3), UL, cUL, FM, ATEX, IECEx for hazardous locations (specific to model and revision).

• Module Dimensions/Weight: Varies by model (e.g., 0.5 kg to 4 kg).

• Color Code: Often dark blue for digital output modules.

Product Advantages

• Unparalleled Safety & Reliability: The core advantage is the TMR architecture and comprehensive diagnostics, which provide extremely high fault tolerance and eliminate single points of failure. This leads to near-zero unplanned downtime due to control system failures.

• High Fault Coverage: Supervised Digital Output (SDO) modules offer extensive diagnostic coverage, not only for internal module faults but also for common field wiring and load issues (open circuits, shorts, loss of power). This significantly enhances overall system safety.

• Hot-Swapping Capability: Modules can be replaced online without shutting down the process, ensuring maximum availability and reducing maintenance impact.

• Simplified Troubleshooting: Detailed diagnostics and LED indicators on the module and ETP facilitate quick and accurate identification of faults, minimizing downtime.

• Ruggedness: Designed for continuous operation in harsh industrial environments.

• Compliance with Safety Standards: Fully compliant with international safety standards like IEC 61508 and IEC 61511, making them ideal for Safety Instrumented Systems (SIS).

• Long Operational Life: Built with high-quality components for extended reliability.

Precautions

• Strict Adherence to Documentation: Always consult the specific module's datasheet and the Triconex Planning and Installation Guide. Deviations can compromise safety and reliability.

• Proper Field Wiring:

• Use the correct external termination panel (ETP) for the module.

• Ensure field wiring adheres to all specified current and voltage ratings.

• Avoid parallel or series connections to digital output points unless explicitly allowed for supervised diagnostics, as this can affect the Output Voter Diagnostics (OVD) and lead to false alarms.

• Proper grounding is critical for safety and system performance.

• Power Supply: Ensure stable and correctly rated power supplies for both the Triconex chassis and the field loads.

• Load Compatibility: Verify that the field load's voltage and current requirements are within the module's specified capabilities. Ensure minimum load requirements are met for supervised modules.

• Environmental Conditions: Install the modules within the specified temperature, humidity, and vibration limits.

• Safety Interlocks: While Triconex modules provide high integrity, ensure proper external safety interlocks and procedures are in place for field devices.

• Firmware Compatibility: Ensure the module's firmware and the Tricon controller's firmware are compatible, especially during upgrades.

• ESD Protection: Always follow Electrostatic Discharge (ESD) precautions when handling modules.

• De-energize to Trip: Understand and adhere to the "de-energize to trip" principle commonly employed in safety systems, ensuring the design properly handles power loss scenarios.

Product Applications

TRICONEX Digital Output Modules are specifically designed for applications where failure to actuate an output correctly could lead to catastrophic consequences. They are fundamental to:

• Emergency Shutdown Systems (ESD): Actuating shutdown valves, emergency vents, and other critical safety devices in the event of a hazardous condition in oil & gas, petrochemical, and power generation plants.

• Fire and Gas (F&G) Systems: Actuating fire suppression systems, alarm horns, beacons, and emergency ventilation in response to fire or gas detection.

• Burner Management Systems (BMS): Safely controlling fuel valves, igniters, and fan dampers in industrial boilers and furnaces to prevent explosions.

• High-Integrity Pressure Protection Systems (HIPPS): Actuating high-speed shutdown valves to prevent over-pressurization of pipelines or vessels.

• Turbomachinery Control & Protection: Providing safe control and shutdown for gas turbines, steam turbines, and compressors.

• Nuclear Power Plants: Used in safety-related control and protection systems.

• Critical Process Control: Any industrial process where an output action is absolutely critical for safe operation, environmental protection, or asset integrity.

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