The GE IS200TVIBH2BAA Vibration Input Board is a specialized vibration monitoring terminal board used within GE Industrial Control Systems. As a member of the TVIB board family, the IS200TVIBH2BAA Vibration Input Board accepts up to 14 vibration probes, two of which can be cabled directly to the VVIB board, and provides the field-side termination, signal conditioning, and buffered outputs required for turbine shaft vibration monitoring in Mark VI control architectures. The VVIB processor board processes and digitizes the displacement and velocity signals and sends them over the VME bus to the controller.
The IS200TVIBH2BAA Vibration Input Board is identified by the GE part numbering convention used throughout the Industrial Control Systems product line. The "IS200" prefix identifies the board as a GE Industrial Control Systems product, with "200" specifically indicating that the board is a base-level assembly. The "TVIB" acronym identifies the board's functional designation as a Vibration Input Board. The "H2" designation identifies the hardware group and the BNC connector variant, while the "BAA" suffix identifies the artwork and functional revision combination. All digits are important when ordering or replacing any board, as boards of different revision levels may not contain identical hardware, and GE ensures backward compatibility of replacement boards while noting that different revision levels may not contain identical components.
The IS200TVIBH2BAA Vibration Input Board is the H2A version of the TVIB family, which includes BNC connectors that allow portable vibration data gathering equipment to be plugged in for predictive maintenance purposes. The H1A version of the TVIB family provides the same basic functionality without the BNC connectors. Both types have connectors so that Bently Nevada vibration monitoring equipment can be permanently cabled to the terminal board to measure and analyze turbine vibration. The H2A version is therefore the preferred choice for applications where periodic portable data collection is required in addition to permanent monitoring.
This product introduction provides detailed technical information, functional descriptions, connector assignments, configuration guidance, and comprehensive specifications for the GE IS200TVIBH2BAA Vibration Input Board, serving as an essential reference for control system engineers, maintenance technicians, and system integrators working with GE industrial control equipment.
Functional Architecture and Signal Processing
The IS200TVIBH2BAA Vibration Input Board is built around a robust vibration measurement architecture that supports up to 14 vibration probes, including proximity, velocity, acceleration, seismic, and phase probes. The board performs several distinct functions that ensure accurate and reliable vibration measurement for turbine protection and predictive maintenance applications.
The Mark VI system uses Bently Nevada probes for shaft vibration monitoring, and the IS200TVIBH2BAA Vibration Input Board is compatible with proximity, velocity, acceleration, seismic, and phase probes. The board accepts up to 14 probes, with eight vibration channels, four position channels, and one Keyphasor channel, providing comprehensive coverage of the turbine shaft vibration, position, and phase measurement requirements.
The board supplies a 28 V DC bus for redundancy, and regulators provide individual excitation sources of −23 to −26 V DC that are short circuit protected. The VVIB processor samples the probe inputs at high speed over discrete time periods, ensuring that transient vibration events are captured and analyzed accurately. The 28 V DC bus and the individual excitation sources ensure that the probes receive stable and reliable power, and the short circuit protection prevents damage to the board and the probes in the event of a field wiring fault.
The board includes buffer amplifiers that provide buffered outputs for the proximity and position probes, and the fourteen BNC connectors on the IS200TVIBH2BAA Vibration Input Board provide buffered signals available to portable data gathering equipment for predictive maintenance purposes. The buffered outputs have unity gain, 10 ohm internal impedance, and can drive loads up to 1500 ohms, ensuring compatibility with a wide range of data collection equipment.
Probe Types and Measurement Capabilities
The IS200TVIBH2BAA Vibration Input Board supports a wide range of probe types and measurement capabilities, providing the flexibility required for different turbine vibration monitoring applications.
For proximity probes, the board measures displacement over a range of 0 to 4.5 V peak-to-peak, with an accuracy of ±0.030 V peak-to-peak over the 5 to 200 Hz frequency range and ±0.150 V peak-to-peak over the 200 to 500 Hz frequency range. This capability allows the board to measure the shaft vibration displacement with high accuracy across the full operating speed range of the turbine.
For seismic probes, the board measures velocity over a range of 0 to 2.25 V peak, with an accuracy of 2% of reading plus ±0.008 V peak. For Velomitor probes, the board measures velocity over a range of 0 to 2.25 V peak, with an accuracy of 2% of reading plus ±0.008 V peak over the 5 to 200 Hz frequency range and 5% of reading plus ±0.008 V peak over the 200 to 500 Hz frequency range. These velocity measurement capabilities allow the board to interface with seismic and Velomitor probes for casing vibration and bearing vibration monitoring.
For accelerometer probes, the board measures velocity using a track filter over a range of 0 to 2.25 V peak, with an accuracy of ±0.015 V peak over the 10 to 233 Hz frequency range. For position probes, the board measures position over a range of −5 to −20 V DC, with an accuracy of ±0.2 V DC, allowing the board to monitor thrust wear, differential expansion, and eccentricity. For phase measurement, the board measures the air gap average and the phase angle over a range of 0 to 360 degrees with an accuracy of ±2 degrees, allowing the board to determine the 1X vibration component with respect to the key slot.
The probe power capability of the IS200TVIBH2BAA Vibration Input Board is −24 V DC from the −28 V DC bus, with each probe supply current limited to 12 mA load per transducer. If the turbine operates at greater than 4,000 rpm, the board can use eight vibration channels with the remaining channels configured as proximity or position channels. If the turbine operates at less than 4,000 rpm, the board can use up to 16 vibration channels with the other probes. The amplitude accuracy is 0.1% for the signal to the Bently Nevada 3500 vibration analysis system.
Installation and Wiring
The IS200TVIBH2BAA Vibration Input Board is designed for straightforward installation and field wiring. The wires for the 14 vibration probes connect to the two terminal blocks, with three wires per probe. In simplex systems, the TVIB1 JR1 connector connects to the VVIB J3 on the VME rack and the TVIB JR1 connector connects to the VVIB J4. In TMR systems, the VVIB JR1, JS1, and JT1 connectors connect to the R, S, and T VVIBs, providing the redundant signal paths required for the TMR architecture.
The board includes jumpers JP1 through JP8, which select the probe type for the first eight probes. The jumper settings are S for seismic, V for velocity, P for proximity, and A for accelerometer, allowing the board to be configured for the specific probe types used in the application. Optionally, the TVIB can be connected to a Bently Nevada system using connectors JA1, JB1, JC1, and JD1, providing a permanent connection to the Bently Nevada vibration monitoring equipment for continuous measurement and analysis.
The board size is 33.0 cm high by 17.8 cm wide (13 in x 7 in), and the terminal blocks are designed for reliable field wiring. The board includes the 37-pin D shell type connectors with latching fasteners for the cables to the VVIB processor, and the BNC connectors for the portable data gathering equipment, ensuring that all connections are secure and reliable in the turbine control cabinet environment.
Diagnostics and Fault Detection
The IS200TVIBH2BAA Vibration Input Board provides comprehensive diagnostic capabilities that assist with system verification and fault isolation. The VVIB performs diagnostic tests on the terminal board components, including a high and low hardware limit check on the probe input signals and a high and low system limit check, with these limits creating faults when exceeded.
A probe fault, alarm, or trip condition occurs if either of an X or Y probe pair exceeds its limits, allowing the board to detect a failure in one of the redundant probe pairs and to alert the operator to a potential problem with the vibration monitoring function. The position inputs for thrust wear protection, differential expansion, and eccentricity are monitored similarly to the vibration inputs, except that only the DC component is used for the position indication, and if a maximum limit is exceeded a fault is created.
The fourteen BNC connectors on the IS200TVIBH2BAA Vibration Input Board provide buffered signals available to portable data gathering equipment for predictive maintenance purposes, allowing the maintenance technician to collect vibration data during periodic surveys and to analyze trends over time. The buffered outputs have unity gain, 10 ohm internal impedance, and can drive loads up to 1500 ohms, ensuring that the buffered signals are compatible with the portable data collection equipment.
Configuration
The IS200TVIBH2BAA Vibration Input Board is configured using jumpers JP1A through JP8A, which select the type of the first eight probes. The jumper choices are S for seismic, V for velocity, P for proximity, and A for accelerometer, allowing the board to be matched to the specific probe types used in the application. The remaining six probes are configured by the VVIB processor software, providing flexibility in the overall probe configuration.
The jumper settings must be verified against the system wiring and the probe types before the board is placed in service, and reference should be made to the installation section of the documentation for more information on the specific jumper settings required for each application.
Application Suitability and System Integration
The IS200TVIBH2BAA Vibration Input Board is a critical component of the turbine vibration monitoring system, providing the field-side termination and signal conditioning for up to 14 Bently Nevada vibration probes. The board's support for proximity, velocity, acceleration, seismic, and phase probes allows it to interface with the complete range of Bently Nevada probes used for turbine shaft vibration, bearing vibration, casing vibration, thrust position, differential expansion, eccentricity, and phase measurement.
In Mark VI systems, the IS200TVIBH2BAA Vibration Input Board works with the VVIB processor and supports simplex and TMR applications, with two TVIBs connecting to the VVIB with two cables in simplex systems and the TVIB connecting to three VVIB processors with three cables in TMR systems. The board's support for both simplex and TMR applications makes it suitable for a wide range of system architectures, from cost-sensitive simplex installations to critical TMR installations where high availability is required.
The board's fourteen BNC connectors provide buffered signals for portable data gathering equipment, allowing the maintenance technician to collect vibration data during periodic surveys and to analyze trends over time for predictive maintenance purposes. The permanent connection to the Bently Nevada 3500 vibration monitoring system through connectors JA1, JB1, JC1, and JD1 provides continuous vibration monitoring and analysis, ensuring that the turbine vibration is monitored continuously and that any abnormal vibration condition is detected and reported.
The board's comprehensive diagnostics, including the hardware and system limit checks, the probe fault, alarm, and trip detection, and the position monitoring, ensure that the vibration monitoring system is reliable and that any fault in the probes or the board is detected and reported to the operator.
Maintenance and Lifecycle
The IS200TVIBH2BAA Vibration Input Board is designed for long service life with minimal maintenance. The board contains no moving parts, and its robust construction ensures high reliability in continuous industrial operation. Routine maintenance consists of periodic visual inspection of the board, terminal blocks, and BNC connectors, verification that the probe readings are within specification, and confirmation that the buffered outputs are available for the portable data gathering equipment.
The board's diagnostic features, including the hardware and system limit checks, the probe fault detection, and the position monitoring, simplify troubleshooting and ensure that any fault in the vibration monitoring system is detected and reported. If a probe fault, alarm, or trip condition occurs, the operator is alerted to a potential problem with the vibration monitoring function, and the maintenance technician can use the buffered outputs and the Bently Nevada 3500 system to further analyze the vibration data and identify the root cause of the problem.
If the board requires replacement, the process is straightforward. After de-energizing the associated equipment and verifying that no power exists, the terminal block connections should be labeled and removed, and the board should be removed from its mounting. The replacement board should be installed in the same position, the jumpers JP1A through JP8A set to match the original configuration, and the terminal blocks and connectors reconnected as labeled before returning the system to service.
GE Industrial Control Systems ensures compatibility of its replacement boards, even though boards of different revision levels may not contain identical hardware. When ordering a replacement IS200TVIBH2BAA Vibration Input Board, provide the complete part number and description, the drive or system serial number, and the Material List (ML) number. The factory may substitute later versions based on availability and design enhancements, but backward compatibility of replacement boards is guaranteed.
Conclusion
The GE IS200TVIBH2BAA Vibration Input Board is a reliable, robust, and versatile vibration monitoring interface for GE Industrial Control Systems. Its 14 probe inputs, supporting proximity, velocity, acceleration, seismic, and phase probes, its comprehensive measurement capabilities for displacement, velocity, position, and phase, its fourteen BNC buffered outputs for portable data gathering equipment, and its support for both simplex and TMR applications provide the flexibility, accuracy, and reliability required for a wide range of turbine vibration monitoring applications.
With its terminal blocks, clearly labeled connectors, comprehensive diagnostics, and compatibility with the Mark VI control system and the Bently Nevada 3500 vibration monitoring system, the IS200TVIBH2BAA Vibration Input Board is designed for easy installation, verification, and maintenance. Backed by GE's quality manufacturing, global support network, and commitment to backward compatibility, the IS200TVIBH2BAA Vibration Input Board continues to deliver the performance, durability, and reliability that industrial users expect from GE. Whether used in a new installation or as a replacement for an existing board, the IS200TVIBH2BAA Vibration Input Board provides the vibration input functionality required for reliable and efficient turbine monitoring and protection.
