TRICONEX 3664

Description

Product Description

The TRICONEX 3664 is a critical Main Processor Module (MPM) for the Triconex (now part of Emerson) Tricon V9 safety instrumented system (SIS). This module forms the computational core of the triple modular redundant (TMR) architecture, where three independent channels execute identical control logic in parallel. The TRICONEX 3664 is responsible for executing the user-configured safety logic, performing hardware-based voting on inputs and outputs, and managing communication with the engineering workstation and other system components. For comprehensive technical data sheets, system planning guides, and configuration manuals, the essential resource is the official Emerson Automation Solutions documentation portal for the TRICONEX 3664. As the brain of the Tricon controller, the reliable operation of the entire safety system depends on the flawless synchronized operation of three 3664 modules. Its design is central to achieving the high availability and fault tolerance that defines the Tricon platform for the most critical safety applications.

Product Parameters

• Manufacturer / Brand: Triconex (Emerson).
• Series: Tricon V9 System.
• Model: 3664 – Main Processor Module.
• Architecture: Triple Modular Redundant (TMR) Processor.
• Function: Primary logic solver for safety shutdown and control applications.
• Processor: Contains the main CPU, memory, and communication controllers for one channel of the TMR system.
• Memory: Equipped with firmware and user application memory. The specific capacity is defined by the model variant and firmware.
• Communication Ports: Includes ports for TriStation (engineering) connection, peer-to-peer communication with other Tricons, and legacy host communication.
• Voting Mechanism: Part of a system where three 3664 modules vote on every I/O point and communication. The system continues if two out of three agree (2oo3 voting).
• Diagnostics: Extensive self-diagnostics and status reporting for the processor channel health.
• Form Factor: A single-slot module that installs into the designated main processor slots in a Tricon V9 main chassis.

Advantages and Features

• Ultra-High Integrity TMR Architecture: Provides continuous, fault-tolerant operation. A failure in one processor channel is masked by the voting of the other two, preventing a spurious shutdown.
• Deterministic Performance: Executes safety logic with a predictable and repeatable scan time, which is a critical requirement for safety loop timing calculations.
• Comprehensive Fault Detection: Each TRICONEX 3664 module continuously performs self-tests and cross-checks with its peer modules. Faults are detected, reported, and isolated.
• Online Repair Capability: A failed 3664 module can be replaced while the Tricon system remains online and continues to control the process, maximizing system availability.
• Certified for Safety Applications: Designed and certified for use in Safety Instrumented Systems (SIS) meeting IEC 61508 and IEC 61511 standards for high Safety Integrity Levels (SIL 3).

Application Cases in Industry

• Oil & Gas Refineries: Serves as the logic solver for the Emergency Shutdown System (ESD) protecting Fluid Catalytic Cracking Units (FCCU) and other high-risk process units.
• Offshore Oil & Gas Platforms: The core of the Fire & Gas (F&G) and ESD systems that safeguard personnel and infrastructure from fire and explosion hazards.
• Gas Compression and Pipeline Stations: Controls the safety shutdown logic for turbine and compressor packages, preventing equipment damage and ensuring pipeline integrity.
• Chemical and Petrochemical Plants: Manages critical safety interlocks for batch reactors, high-pressure vessels, and toxic chemical handling systems.
• Power Generation (Turbine Control): Used in turbine protection systems and burner management systems (BMS) to ensure safe start-up, operation, and shutdown.

Comparison with Competing Products

The TRICONEX 3664 competes with main processors from other safety system vendors, primarily the HIMA HIMatrix CPUs and the Siemens SIMATIC S7-400H F/FH systems. Compared to a simplex or dual-redundant PLC (like a standard ControlLogix or S7-1500), the 3664 and the Tricon system offer a fundamentally higher level of hardware fault tolerance through its TMR architecture. The primary competitor is the Emerson DeltaV SIS (which uses a different 1oo2D architecture). The TRICONEX 3664‘s advantage is its long-proven history, dedicated safety focus, and the simplicity of its hardware-based voting, which can be advantageous for certain certification paths and high-vibration environments.

Selection Suggestions and Precautions

• Selection Suggestions:
  1. The TRICONEX 3664 is specified as part of a complete Tricon V9 system design. It is selected based on the processing power and memory requirements of the safety application.
  2. It is always deployed as a set of three identical modules installed in the designated slots (usually slots 1, 2, and 3) of the main chassis.
  3. Ensure compatibility with the Tricon chassis model (e.g., 3008, 3009) and the associated I/O modules and communication cards.
• Precautions:
  1. TMR System Knowledge: Working with the TRICONEX 3664 requires specialized training on the Tricon platform. It is not programmed or maintained like a standard PLC.
  2. Synchronization is Critical: The three processor modules must remain in tight synchronization. Any issue with the inter-processor communication cables or the system’s Triple Modular Redundant (TMR) bus can cause a system fault.
  3. Firmware and Application Consistency: All three 3664 modules must run identical firmware and application logic. Mismatches will cause a fault. Use proper revision control and download procedures.
  4. Handling and ESD: Treat the modules as highly ESD-sensitive. Use proper grounding straps and handling procedures.
  5. Genuine Parts and Support: Due to its critical safety role, source authentic TRICONEX 3664 modules only from authorized Emerson distributors or certified refurbishment centers. The use of non-certified parts can compromise the entire safety system’s certification and reliability. Always have a verified backup of the application logic.

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