Description
Product Overview
The GE IS200AEPAH1AFD is a critical Analog Input Module from the General Electric (GE) Mark VI Speedtronic™ gas/steam turbine control system, belonging to the AEPA model series. This module is a high-performance, isolated input channel card designed for the precise acquisition and conditioning of analog process signals. Its primary function is to interface with a variety of field transmitters and sensors, such as 4-20 mA current loop transmitters, thermocouples, RTDs, and DC voltage sources, converting these analog signals into high-resolution digital values for use by the Mark VI’s main control processors. The module performs essential signal conditioning tasks, including filtering, scaling, linearization, and isolation, to ensure accurate and reliable data acquisition in the electrically demanding environment of a turbine control cabinet. The suffix
H1AFDdenotes a specific hardware revision, channel configuration, isolation specification, and I/O characteristics.The value of the GE IS200AEPAH1AFD lies in its precision, reliability, and integration within the Mark VI I/O architecture. It serves as a key sensory interface for monitoring critical turbine parameters, including but not limited to bearing temperatures, lube oil and fuel pressures, compressor and exhaust temperatures, and other process variables vital for control, sequencing, and protection logic. Each channel is equipped with high-grade galvanic isolation to protect the sensitive control system electronics from field-side transients, ground loops, and common-mode noise. The module incorporates built-in diagnostics to detect sensor faults, such as open thermocouples or broken RTD wires. For turbine engineers and control system maintainers, the dependable operation of the AEPAH1AFD module is fundamental for maintaining safe operating limits, enabling precise control loops, and providing the high-fidelity data required for condition monitoring and historical performance analysis of the turbine.
Technical Specifications
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Parameter Name
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Parameter Value
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Product Model
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GE IS200AEPAH1AFD
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Manufacturer
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General Electric (GE)
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System Platform
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Mark VI Speedtronic™ Turbine Control System
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Product Type
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Isolated Analog Input Module
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Input Channels
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Typically configured as 8 or 16 isolated analog input channels per module (specific to the AEPA-H1AFD variant).
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Input Signal Types
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Configurable per channel to accept:
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Key Features and Advantages
GE IS200AEPAH1AFD excels through its versatility, accuracy, and integrated intelligence. A key strength is its per-channel configurability; each input can be independently software-configured for a different signal type (mA, V, TC, RTD). This flexibility allows a single module type to serve diverse measurement points throughout a turbine control system, simplifying engineering and spare parts management. The module’s high channel density combined with robust signal isolation ensures accurate acquisition of multiple signals without crosstalk or interference, which is critical for reliable control and protection algorithms.
Advanced diagnostic capabilities and signal integrity are fundamental to its design. Beyond basic measurement, the AEPA module proactively monitors the health of connected sensors. Its ability to detect an open thermocouple or RTD circuit is a critical safety feature, as a failed temperature sensor could mask a hazardous over-temperature condition. These diagnostic alarms are reported directly to the Mark VI controller for immediate operator awareness. The module’s design ensures excellent noise immunity and stable operation in the presence of strong electromagnetic interference common near large rotating machinery.
Seamless system integration and high reliability are paramount benefits. As a native Mark VI component, it guarantees full compatibility with the system backplane, controller, and configuration tools (ToolboxST software). Its modular, hot-swappable design (when supported by system architecture and procedures) facilitates replacement without necessitating a full system shutdown. For system designers and maintenance personnel, the IS200AEPAH1AFD provides a trusted, high-performance solution for acquiring critical analog data. It forms a reliable foundation for the turbine’s monitoring, control, and protection systems, directly contributing to unit availability, operational safety, and efficiency.
Application Areas
The GE IS200AEPAH1AFD analog input module is deployed within GE Mark VI turbine control systems across the power generation, industrial, and mechanical drive sectors.
Its application is dedicated to measuring vital process variables for gas and steam turbine control, monitoring, and protection, including:
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Temperatures: Bearing metal temperatures, lube oil temperature, compressor inlet/discharge temperatures, turbine exhaust temperature, stator winding temperatures.
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Pressures: Lube oil pressure, fuel gas pressure, hydraulic control pressure, compressor discharge pressure.
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Flows and Levels: (Via 4-20 mA transmitters) Fuel flow, coolant flow, reservoir levels.
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Vibration and Position: (Conditioned signals from monitoring systems) provided as 4-20 mA or voltage inputs.
Essentially, any continuous process variable on a turbine that requires monitoring for control logic, operator display, protection algorithms, or performance trending is a candidate for measurement by an AEPA module. It is a fundamental component in the data acquisition layer of the Mark VI system.
Related Products
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GE Mark VI Controller (e.g., IS200/IS215 series processors): The main processor that reads and utilizes data from the AEPA module.
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GE Mark VI I/O Pack Carriers/Backplanes: The hardware chassis that houses the AEPA and other I/O modules.
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GE Mark VI Digital I/O Modules (e.g., DDPC, DTPC series): For handling discrete (on/off) signals.
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Field Sensors and Transmitters: Thermocouples, RTDs, and 4-20 mA transmitters that connect to the AEPA inputs.
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Terminal Boards/Blocks: The interface hardware between field wiring and the AEPA module’s connector.
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GE ToolboxST Software: The comprehensive configuration, programming, and diagnostic environment for the Mark VI system, used to set up the AEPA module’s channel parameters, scaling, alarms, and diagnostics.
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