IS230TGNAH1A - Generator PLU Assembly

IS230TGNAH1A - Generator PLU Assembly IS230TGNAH1A - Generator PLU Assembly

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Part No.: IS230TGNAH1A
Manufacturer: General Electric
Product Type: Generator PLU Assembly
Mounting: DINrail
Frame rate: 720 or 600 Hz
Calculated values: Total current, Mechanical power
Current inputs: 4-20 mA
Voltage inputs: ±5 V dc or ±10 V dc
Technology: Surface-mount
Availability: In Stock
Country of Manufacture: United States (USA)
Series: Mark VIe

Functional Description

IS230TGNAH1A is an Generator PLU Assembly developed by GE. It is a part of Mark VIe control system. The Turbine-Generator terminal board (TGNA) serves as a crucial signal interface board designed to work in conjunction with the Mark VIe I/O pack PGEN. In the previous Mark VI system, the VGEN board was compatible with TGEN, but now the TGNA efficiently handles the signal interface tasks.


  • Equipped to interface with three analog inputs dedicated to sensing turbine steam pressure. The analog inputs can be configured as 4-20 mA, +/- 5 V, or +/-10 V inputs, offering flexibility to accommodate different pressure sensing requirements.
  • In addition to turbine steam pressure, the component provides three current transformer (CT) feedback inputs for sensing generator current. The CT inputs can be fed from 1 A or 5 A rated CT outputs, allowing for the use of different amp ratings based on the application's needs.
  • Each of the three analog inputs has two jumpers for configuration purposes. The first jumper is used to select either current (4-20 mA) or voltage feedback, allowing for easy switching between these two signal types based on the system requirements.
  • The second jumper for each analog input offers the option to ground the return path for the inputs. This feature provides flexibility in grounding strategies, ensuring compatibility with various grounding schemes used in industrial systems.
  • To designate which terminal board points are used for the CT inputs, a configuration parameter called "CT_Secondary" is employed. This parameter enables easy selection and assignment of the appropriate terminal board points for CT feedback.
  • The signals received from turbine steam pressure and generator current sensing are passed on to the Mark VIe I/O packs through a 37-pin connector. This interface ensures seamless and reliable communication between the TGNA and the I/O packs, allowing for efficient data exchange.


The Turbine-Generator terminal board is a crucial component of the control system that efficiently accepts and processes analog and CT inputs. Specifically, it has provisions for three analog input channels, designated as channels 1 through 3, and three CT inputs, enabling precise monitoring and control of critical turbine and generator parameters.

  1. Versatile Analog Input Channels: Three analog input channels (1 to 3) offer versatile compatibility, supporting both voltage and 4-20 mA current turbine pressure inputs. This flexibility allows the control system to seamlessly interface with different types of sensors and transmitters, catering to a wide range of turbine pressure measurement requirements.
  2. Current-Limited 24 V Power Supply: Each analog input channel is equipped with a dedicated current-limited 24 V power supply. This power supply ensures that the sensors or transmitters connected to the TGNA receive a stable and precisely regulated power source, promoting accurate and reliable measurements.
  3. JP1 Jumper for Input Selection: JP1 is a critical jumper configuration used to select between voltage and current inputs for the analog channels. By placing the jumper in position 3 or 5, the channel can be configured to accept a 4-20 mA current input. Alternatively, positioning the jumper in positions 4 or 6 allows the channel to accept a voltage input.
  4. JP2 Jumper for Return Configuration: JP2 is another essential jumper that configures the return path of the analog inputs. It offers two options for return configuration:
    1. True Differential Input: By configuring JP2 to connect the return as Open, the input operates in a true differential mode, ensuring precise differential measurements and reducing common-mode interference.
    2. 24 V Return: Alternatively, JP2 can be configured to connect the return to PCOM (Power Common) for a 24 V return. This configuration is suitable for certain applications where a 24 V reference is required for the sensor or transmitter.
  5. Enhanced Signal Integrity and Noise Immunity: The utilization of true differential inputs in combination with 24 V power supplies enhances signal integrity and noise immunity. This design minimizes the impact of external interferences and ensures accurate measurements, even in electrically noisy environments.
  6. Seamless Integration with Turbine and Generator Sensors: By supporting both voltage and 4-20 mA current inputs, the TGNA seamlessly integrates with a wide range of turbine pressure sensors and generator current transducers. This capability simplifies the connection process and enhances system compatibility.
  7. Safety and Reliability: The current-limited 24 V power supply and precise jumper configurations contribute to the safety and reliability of the TGNA. The controlled power supply prevents excessive current flow, protecting connected devices, while the jumper settings ensure accurate input selection and proper return configuration.
  8. Data Consistency and Accuracy: The careful design and configuration of the TGNA's analog input channels result in consistent and accurate data acquisition. This reliable data forms the basis for precise control algorithms and effective decision-making within the control system.

World of Controls has the most comprehensive collection of GE Mark VIe components. Please contact WOC as soon as possible if you require any extra information.


Frequently Asked Questions


What is IS230TGNAH1A?
It is an Generator PLU Assembly developed by GE

What are the primary inputs that the module interfaces with?
The TGNA is equipped to interface with three analog inputs dedicated to sensing turbine steam pressure and three current transformer (CT) feedback inputs for sensing generator current.

What are the available configuration options for the analog inputs?
The analog inputs can be configured as 4-20 mA, 5 V, or 10 V inputs. This versatile configuration capability allows to accommodate different pressure sensing requirements in diverse industrial applications.

Can the TGNA handle different amp ratings for the CT inputs?
Yes, TGNA offers flexibility in handling CT inputs with different amp ratings. The CT inputs can be fed from either 1 A or 5 A rated CT outputs, depending on the specific needs of the application.