The IS220PAICH2A 336A4940CSP11 Analog I/O module is a high-precision signal acquisition and output component tailor-made by GE for the Mark VIe Turbine Control System. Its core function is to collect analog signals such as temperature, pressure and flow of industrial turbines (gas turbines, steam turbines) in real time, and output control commands to actuators. It is highly adapted to the monitoring needs of turbine units in fields such as power, petrochemical and aerospace industries, and serves as a key hardware unit for "precision control and safe operation" of GE's turbine systems.

Technical Characteristics

Signal Acquisition and Output Capability

• Analog Input (AI): 8 differential input channels, supporting four signal types: DC 0~10V, DC 4~20mA, RTD (PT100/PT1000), and thermocouple (Type K/J). Each channel is independently configurable via GE Toolbox software.
• The acquisition accuracy reaches ±0.02% of full scale (for DC 4~20mA signals) with a 24-bit resolution, enabling capture of micro-variations as small as 0.1μm in turbine shaft vibration.
• It supports signal isolation, with an isolation voltage of 2500Vrms between channels to prevent crosstalk between different signals.
• Analog Output (AO): 4 output channels, supporting DC 0~10V and DC 4~20mA signals. The output accuracy is ±0.05% of full scale, with a load driving capacity of 500Ω and a response time of ≤1ms. It can quickly output turbine valve opening adjustment commands (e.g., for fuel valves and steam valves) to ensure the real-time performance of control instructions.

Anti-Interference and Environmental Adaptability

Electromagnetic Compatibility (EMC)

• Complies with EN 61000-6-2 (industrial immunity) and EN 61000-6-4 (industrial emission limits) standards, capable of resisting electromagnetic interference generated by high-power motors and frequency converters in turbine units (e.g., signal ripple ≤10mV under an electric field strength of 10V/m).
• Built-in turbine-specific filtering algorithm, optimized for 1x and 2x frequency vibration signals of turbines, to filter high-frequency vibration noise and ensure stable acquired data.

Environmental Tolerance

• Operating temperature range: -40℃~+70℃ (suitable for high-temperature environments in turbine rooms, such as gas turbine rooms where temperatures often reach 60℃).
• Storage temperature range: -40℃~+85℃; relative humidity: 5%~95% (non-condensing).
• Vibration resistance rating: IEC 60068-2-6 (10-2000Hz, acceleration 20m/s²); shock resistance rating: IEC 60068-2-27 (500m/s², 1ms), adaptable to high-frequency vibrations during turbine operation.

System Compatibility and Synchronization

Exclusive Adaptation to GE Mark VIe System

• Can be directly inserted into the slot of the Mark VIe controller rack. Its interface definition is fully compatible with the system bus (GE Speedtronic Bus), requiring no additional adapter modules.
• Supports parameter configuration via GE Toolbox configuration software (e.g., signal type, range, filtering frequency), and can achieve millisecond-level data synchronization with speed modules and logic modules in the Mark VIe system to ensure the timing consistency of turbine control (e.g., synchronization deviation between speed and fuel valve commands ≤0.5ms).

Diagnostics and Communication

• Integrates an RS485 communication interface (supporting Modbus RTU protocol), which can upload module working status (e.g., channel faults, internal temperature) and acquired data to the turbine monitoring system.
• Built-in channel-level diagnostic function, with independent monitoring for each AI/AO channel (e.g., open circuit, short circuit, over-range). When a fault occurs, it outputs an alarm signal and saves the fault code (e.g., "E01" = AI channel open circuit, "E02" = AO output short circuit) to facilitate quick fault location.

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