IS230PCAAH1BC - Core Analog Module

IS230PCAAH1BC - Core Analog Module IS230PCAAH1BC - Core Analog Module

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Part No.: IS230PCAAH1BC
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 33.02 cm high x 17.8 cm wide
Technology: Surface-mount
Operating temperature: -30 to 65oC
Number of Inputs: 25
Product Type: Core Analog Module
Availability: In Stock
Series: Mark VIe

Functional Description

IS230PCAAH1BC is a Core Analog Module developed by GE. It is a part of Mark VIe control system. The Core Analog (PCAA) module, along with the optional Core Analog (TCAT) terminal board, is integral to the management of analog signal input/output (I/O) required for operating a gas turbine. These components ensure the efficient and precise control and monitoring of turbine performance by handling a substantial portion of the necessary analog signals.


  • Support various critical functions essential for gas turbine operation. They provide thermocouple inputs, which are vital for accurate temperature measurement at various points within the turbine. Maintaining precise temperature control is crucial to prevent overheating and ensure optimal turbine performance. Additionally, the modules handle 4-20 mA current loop I/O, a standard method for transmitting analog signals over long distances with high resistance to electrical noise. This capability ensures robust and reliable communication with various sensors and actuators.
  • Accommodate seismic inputs, allowing the system to monitor vibrations and other seismic activities that could impact the turbine. This feature is essential for early detection of potential issues, enabling preventive measures to avoid damage. The modules also provide Linear Variable Differential Transformer (LVDT) excitation and inputs, which are used to measure linear displacement with high accuracy. This capability facilitates precise position monitoring of turbine components, contributing to efficient and safe operation.
  • Support pulse rate inputs, crucial for measuring the speed of rotating components within the turbine. Monitoring rotational speed is vital to ensure the turbine operates within safe and efficient parameters. Additionally, the modules manage servo coil outputs, which control the actuation of various mechanical components. This ability allows for fine-tuned control of the turbine’s operations, enhancing overall performance.
  • Configured for use in both simplex (single-module) and triple modular redundant (TMR) systems. TMR systems provide enhanced reliability and fault tolerance by utilizing three separate modules to process the same inputs and outputs, ensuring continuous operation even if one module fails. The TCAT terminal board further enhances system flexibility by distributing signal inputs to one or three connected PCAA modules, allowing for scalable and flexible configurations to meet different redundancy and performance requirements.


  • Securely Mount the Module: Begin the installation process by securely mounting in its designated location. Ensuring that the module is firmly attached will provide a stable base for all subsequent connections and prevent any movement that could disrupt the system's operation.
  • Connect the Power Connection: Next, connect the power connection to the P4 connector on the module. This step is crucial for supplying the necessary power to the module, enabling it to perform its functions effectively.
  • Connect the PCAA Module to the TCAT Terminal Board: If using a TCAT terminal board, connect the module to the board using two 68-pin cables attached to connectors P1 and P2. The TCAT connectors are paired by network connections:
    • PR1 and PR2 connected to the R controller network.
    • PS1 and PS2 connected to the S controller.
    • PT1 and PT2 connected to the T controller.
  • Ensure that the cable mounting screws are fully seated and tightened finger-tight only, to ensure proper cable grounding. Inadequate securing of cables can lead to the failing to read the electronic ID on the TCAT, which may degrade signal quality.
  • Connect Ethernet Cables: Depending on your system configuration, plug in one or two Ethernet cables. For systems using a single IONet connection, it will operate correctly via either Ethernet port. If dual connections are employed, it is standard to connect ENET1 to the network associated with the R controller. In systems with TMR modules, ensure that the network connection corresponds with the TCAT connections. For instance, the module connected to the R IONet should have cables connected to the TCAT PR1 and PR2 connectors.
  • Check Grounding of the JGPA Shield Wire Terminals: Verify the grounding of the JGPA shield wire terminals. Typically, JGPA shield ground terminals are electrically connected to the sheet metal on which the board is mounted, providing a ground path. In some applications, a shield ground independent of the mounting sheet metal is required. In these cases, the JGPA is mounted with hardware that isolates it from the sheet metal, and a suitable ground wire must be provided between one or more JGPA terminals and the required shield ground potential.
  • Apply Power and Check Status Indicators: Apply power to the module through the P5 connector. After powering up, check the power and Ethernet status indicator lights to ensure that the module is receiving power and that network connections are functioning properly.
  • Configure the Module: Finally, use the ToolboxST application to configure the module as necessary. This software tool allows you to set up and fine-tune the module’s settings to meet the specific requirements of your gas turbine operation, ensuring optimal performance and integration within the system.

The WOC team is always available to help you with your Mark VIe requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS230PCAAH1BC?
It is a core analog module developed by GE under the Mark VIe series.

What role do LVDTs play in the PCAA and TCAT modules?
LVDTs are used to measure linear displacement with high accuracy. The PCAA and TCAT modules provide the necessary excitation and input handling for LVDT sensors, facilitating precise position monitoring of turbine components.

How do the modules manage pulse rate inputs, and why are they important?
Pulse rate inputs measure the speed of rotating components within the turbine. Monitoring rotational speed is crucial for ensuring the turbine operates within safe and efficient parameters, preventing mechanical failures, and optimizing performance.

What are servo coil outputs used for in these modules?
Servo coil outputs control the actuation of various mechanical components within the turbine. This allows for fine-tuned control of the turbine's operations, enhancing performance and operational precision.