The GE IS200PAOCH1B is a highly specialized Analog Output Board designed for use in GE Mark VI and Mark VIe turbine control systems. Its primary role is to generate analog output signals that are used to control actuators, valves, or transmit setpoints to external systems in real-time. The PAOCH1B board operates in concert with system processors and I/O controllers to translate digital control decisions into precise analog signals ranging from 4–20 mA, 0–20 mA, or ±10 V.

This board forms a critical interface between the control system and the physical turbine components, ensuring that dynamic setpoints for pressure, flow, or other controlled variables are accurately transmitted. It features integrated diagnostics, galvanic isolation, and robust signal conditioning, which are essential for safety and reliability in high-stakes turbine environments such as gas, steam, and hydroelectric power plants.

The IS200PAOCH1B is not a standalone module—it is mounted in a VME rack and communicates through the IONet with other GE control system modules. It plays a vital role in control loop finalization, enabling effective analog signal output for field devices in demanding industrial settings.

Product Specifications

Product Applications

The IS200PAOCH1B is widely used across various industrial and energy generation sectors. Its primary applications include:

• Gas Turbine Control Systems

  Controls fuel flow or air modulation through analog signal outputs to valves or positioners.

• Steam Turbine Governors

  Sends precise control signals to steam valve actuators to regulate load and speed.

• Hydroelectric Plant Actuation Systems

  Drives servo mechanisms for gate control in hydro turbines based on control loop feedback.

• Combined Cycle Plants

  Interfaces with Balance of Plant (BoP) systems for inter-process analog control.

• Boiler and Feedwater Control

  Provides control setpoints to feedwater valve actuators or level control mechanisms.

• Compressor Stations and Industrial Process Plants

  Controls analog devices including dampers, variable frequency drives, and regulators.

Product Advantages

• Precision Analog Output

  Delivers high-resolution, low-noise analog signals to critical turbine control devices.

• Flexible Output Configuration

  Channels support multiple output formats (current and voltage) and are software-configurable.

• Built-in Isolation

  Electrical isolation between channels and system ground ensures protection from surges and transients.

• Advanced Diagnostics

  Continuous signal integrity checks, fault flags, and watchdog timers ensure reliable operations.

• High Compatibility

  Integrates seamlessly with other GE Mark VI and VIe I/O modules for efficient system design.

• Redundancy Capable

  Designed to support fully redundant analog output systems for mission-critical applications.

• Environmentally Robust

  Designed with conformal coating and wide operating temperature range for industrial reliability.

• Ease of Maintenance

  Modular design with self-check capabilities simplifies system troubleshooting and replacement.

Frequently Asked Questions (FAQ)

1. What analog output ranges does the IS200PAOCH1B support?

   It supports 0–20 mA, 4–20 mA, and ±10 V output ranges.

2. Can output signal ranges be changed during runtime?

   Output range settings are software-configurable but should be set during system configuration, not live runtime.

3. Does the board provide channel-to-channel isolation?

   Yes, each analog output channel is isolated from others and from system ground.

4. What is the maximum load resistance for current output signals?

   Up to 1000 ohms.

5. How does the board detect output channel faults?

   It uses internal diagnostics to monitor signal integrity and reports faults to the controller.

6. Is the board compatible with third-party control systems?

   It is optimized for GE Mark VI/VIe systems and may require custom integration for use with non-GE systems.

7. Does this module support redundant operation?

   Yes, it is designed for use in redundant analog output configurations.

8. What kind of actuators can be controlled using this board?

   It can interface with current- or voltage-driven actuators, valve positioners, and industrial regulators.

9. What resolution does the D/A conversion offer?

   The board uses a 12-bit DAC for high-resolution signal generation.

10. How does the PAOCH1B communicate with the controller?

    Through IONet communication using a VCMI interface module.