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The GE IS230TNSVH4AAX is a triple-modular redundant (TMR), ATEX-certified servo valve output module assembly for the GE Mark VIe control system. The “AX” in the part number indicates the module is certified for use in potentially explosive atmospheres. This assembly is designed for highly precise, fault-tolerant control of servo valves in hazardous locations.
Key Features
- TMR (Triple-Modular Redundant): This is the most critical feature. The TMR configuration uses three identical I/O packs to control the same servo valve. A voting algorithm compares the commands from all three packs, ensuring that the control system sends the correct signal even if one or two modules fail.
- ATEX Certification: The “AX” signifies that the module meets the safety standards for operating in hazardous environments where flammable gases, vapors, mists, or dust may be present. This is a crucial safety requirement in industries like oil and gas.
- Servo Valve Output: The module’s primary function is to send continuous, high-resolution analog signals (typically current or voltage) to precisely control the position of a servo valve. These valves are essential for dynamic control of hydraulic actuators, which position turbine valves and other critical machinery.
- Assembly: The part number signifies a complete, ready-to-install unit, consisting of a terminal board (TSVCH2A) and three electronic I/O packs (PSVOH1B).
- Mark VIe Integration: As part of the IS230 series, this assembly is a key component of the Mark VIe control platform, which is widely used for controlling turbines in power generation and other heavy industries.
Applications
The IS230TNSVH4AAX is used in mission-critical industrial settings where a loss of control of a servo valve could lead to a catastrophic event or significant downtime, especially in hazardous environments.
- Power Generation: It is a core component in a turbine’s control and protection system, providing a reliable output to precisely position valves (such as fuel gas or steam valves) to regulate speed and load in areas where explosive gases may be present.
- Oil and Gas: In refineries and offshore platforms, it controls the position of critical valves to regulate flow, pressure, and temperature with high accuracy and safety.
- Safety Instrumented Systems (SIS): The module’s design, redundancy, and ATEX certification make it suitable for use in safety-instrumented systems, where the goal is to bring a process to a safe state when dangerous conditions are met.
