SPECIFICATIONS
Part No.: IS230TGNAH2A
Manufacturer: General Electric
Product Type: TMR DINrail Module
Mounting: DINrail
Sampling type: 16-bit A/D converter,
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
IS230TGNAH2A is an TMR DINrail Module developed by GE. It is a part of Mark VIe control system. TGNA serves as a vital signal interface board for the I/O pack PGEN. Its role is to facilitate seamless communication between the control system and the various sensors and transducers used for monitoring turbine steam pressure and generator current. TGNA provides a direct interface to three analog inputs dedicated to sensing turbine steam pressure. These analog inputs play a pivotal role in monitoring and controlling the steam pressure in the turbine, ensuring safe and efficient operation. The analog inputs on the TGNA offer versatile compatibility. This flexibility caters to various pressure sensing requirements, accommodating different types of sensors and transmitters.
Features
- The TGNA is versatile and compatible with both simplex and Triple Modular Redundancy (TMR) applications. In TMR setups, the TGNA fans the signals to three I/O packs, enhancing redundancy and fault tolerance in critical applications.
- In TMR applications, the redundancy provided by the TGNA ensures that even if one I/O pack or controller encounters an issue, the other two redundant packs continue to receive the necessary signals, maintaining system integrity and performance.
- As a signal interface board, it plays a crucial role in accurately transmitting and receiving essential signals related to turbine steam pressure and generator current. A reliable signal interface is crucial for precise control and monitoring of turbine-generator operations.
- By offering configurable input types, amp rating options, and jumper configurations, the module provides enhanced flexibility in adapting to diverse control system requirements. This adaptability contributes to improved system performance and operational efficiency.
Operation
- CT Inputs and Phase Verification: PGEN is equipped with three single-phase CT inputs that continuously monitor generator current. The CT inputs offer a normal current range of 0 to 5 A continuous or 0 to 1 A continuous, enabling the module to handle a wide range of current levels. Test points are provided for these CT inputs, facilitating on-site phase verification and ensuring precise measurements.
- Magnetic Isolation for CTs on TGNA: The CT inputs are magnetically isolated on the Turbine-Generator terminal board (TGNA), enhancing safety and minimizing interference between circuits. This magnetic isolation helps to maintain accurate measurements and prevents any cross-talk between CT inputs.
- Non-Pluggable Terminal Blocks with Captive Lugs: The CTs connect to non-pluggable terminal blocks, ensuring secure connections and preventing accidental disconnections. The terminal blocks are equipped with captive lugs that accept wires up to #10 AWG, accommodating a wide range of wire sizes for convenient installation.
- Calculation of Total Generator Current: PGEN efficiently calculates the total generator current from the three single-phase CT inputs, providing valuable information for generator load and overall system performance monitoring.
- Noise Reduction with Analog Hardware Filter: To maintain precise measurements, the module incorporates an analog hardware filter that effectively reduces high-frequency and 50/60 Hz noise. This noise reduction ensures accurate and stable readings, even in electrically noisy environments.
- Flexibility in Input Types: The three analog inputs accept either 4-20 mA inputs or �5, �10 V dc inputs. This versatile input capability allows the module to interface with a variety of sensors and transducers, providing flexibility in turbine power monitoring.
- +24 V dc Source for Analog Inputs: A +24 V dc source is available for all three circuits handling the analog inputs. Each circuit has individual current limits, ensuring proper power supply and preventing overloading of the inputs.
- Self-Powered or External +24 V dc Source: 4-20 mA transducers connected to the PGEN module can utilize either the +24 V dc source from the turbine control or an external self-powered source. This feature allows users to choose the most suitable power source based on their specific application requirements.
- Jumper Selection for Current and Voltage Inputs: A jumper on the TGNA provides easy configuration for each circuit, allowing users to switch between current and voltage inputs. This jumper-based selection simplifies the setup process and ensures the correct input type is chosen for each circuit.
- TMR System Redundancy: In Triple Modular Redundancy (TMR) systems, the analog inputs fan out to the three I/O packs (PGEN), providing redundancy and fault tolerance. This redundancy ensures that critical input signals are reliably transmitted to all three packs, maintaining system integrity in case of any pack or controller failures.
- Diode-Sharing of +24 V dc Power: In TMR setups, the 24 V dc power to the transducers is supplied by all three PGEN packs. The TGNA employs diode-sharing to distribute the power, preventing voltage conflicts and ensuring continuous power supply to the analog inputs.
Analog inputs
- Current Inputs: 4-20 mA -�The analog input system supports current inputs within the range of 4-20 mA. This allows for the precise measurement of current signals, providing valuable information about the operational state of connected devices or sensors.
- Voltage Inputs: �5 V dc or �10 V dc -�The system is designed to accommodate voltage inputs, offering flexibility with voltage ranges of �5 V dc or �10 V dc. This versatility allows users to integrate a variety of sensors and devices with different voltage output specifications.
- Transducer Distance and Cable Resistance -�Transducers can be positioned up to 300 meters (984 feet) away from the control cabinet, using a two-way cable with a resistance of 15 ohm. This extended reach enables the system to monitor and gather data from remote locations, enhancing its applicability in various settings.
- Input Burden Resistor-�To ensure accurate current measurements, an input burden resistor of 250 ohm is present on the TGNA (Transducer General Node Assembly). This resistor is a crucial component in the analog input system, optimizing the performance of the current inputs.
- Jumper Selection Options -�
- Single Ended or Self-Powered Inputs: Users can choose between single-ended or self-powered inputs based on the specific requirements of their application. This flexibility accommodates a variety of devices and setups.
- Voltage or Current Inputs: Jumper selection allows users to switch between voltage and current inputs. This adaptability is valuable in scenarios where different types of sensors or transducers are employed.
- Analog Input Filter -� The analog input system features an analog input filter designed to break at 72 and 500 radians per second (rad/sec). This filtering capability helps eliminate unwanted noise and ensures the accuracy of the measured signals.
- Common Mode Rejection (CMR) -�
- AC Common Mode Rejection (CMR): The system boasts an AC common mode rejection of 60 dB, demonstrating its effectiveness in rejecting common-mode noise during AC signal transmission.
- DC Common Mode Rejection (CMR): With a DC common mode rejection of 80 dB, the system excels at eliminating unwanted noise and interference during DC signal transmission, ensuring the fidelity of the input signals.
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 IS230TGNAH2A?
It is an TMR DINrail Module developed by GE
How is the CT input assignment managed on the TGNA?
The TGNA uses a configuration parameter called "CT_Secondary" to designate which terminal board points are used for the CT inputs. This parameter simplifies the selection and assignment process, ensuring accurate CT feedback configuration.
How are the signals transmitted to the control system?
The signals received from turbine steam pressure and generator current sensing are transmitted to the Mark VIe I/O packs through a 37-pin connector. This seamless interface ensures reliable communication and efficient data exchange between the component and the I/O packs.
Can the TGNA be used in both simplex and Triple Modular Redundancy (TMR) applications?
Yes, it is versatile and compatible with both simplex and TMR applications. In TMR setups, the TGNA fans the signals to three I/O packs, providing redundancy and enhanced fault tolerance in critical applications.
