GE IS200TVBAH2A IS200TVBAH2ACC Vibration Input Terminal Boards

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GE IS200TVBAH2A IS200TVBAH2ACC

GE IS200TVBAH2A and IS200TVBAH2ACC are Vibration Input Terminal Boards (TVBA) designed for the GE Mark VI Speedtronic turbine control system. They serve as the interface between vibration sensors and the PVIB/YVIB I/O processor, providing reliable signal conditioning and protection for turbine monitoring applications.

Key Features

• Manufacturer: GE (General Electric)
• Part Numbers: IS200TVBAH2A, IS200TVBAH2ACC
• Series: Mark VI Speedtronic
• Module Type: Vibration Input Terminal Board (TVBA)
• Primary Function: Signal interface for vibration monitoring
• Applications: Gas turbines, steam turbines, compressors, generators, and other rotating machinery.

Main Functions

The TVBA board provides:

• Interface for seismic (velocity) sensors
• Support for proximity probes (Proximitors)
• Velomitor sensor connections
• Accelerometer input support
• Electromagnetic interference (EMI) protection
• Signal suppression and conditioning
• Open-circuit detection for sensor diagnostics
• Buffered outputs for external monitoring systems such as Bently Nevada equipment.

Technical Specifications

Parameter	Specification
Product Type	Vibration Input Terminal Board
Control Platform	GE Mark VI Speedtronic
Sensor Inputs	Up to 14 channels
Signal Interface	37-pin connector to PVIB/YVIB I/O Pack
Buffered Outputs	BNC, DB9, DB25
Power Supply	Internal ±24 V sensor supply
Diagnostics	Open-circuit detection, board identification
Installation	Simplex or Triple Modular Redundant (TMR) systems

 

Input Configuration

The board supports:

• Channels 1–8: Proximity probes, seismic sensors, accelerometers, Velomitors
• Channels 9–12: Proximity probes
• Channel 13: Keyphasor or proximity reference probe
• Additional channel: Reference/monitoring support depending on system configuration.

Applications

The IS200TVBAH2A/IS200TVBAH2ACC is commonly used in:

• Gas turbine control systems
• Steam turbine monitoring
• Power generation plants
• Oil & gas facilities
• Industrial compressors
• Rotating equipment condition monitoring
• Predictive maintenance systems.

IS200TVBAH2A vs. IS200TVBAH2ACC

The IS200TVBAH2ACC is generally considered a later hardware/configuration revision of the IS200TVBAH2A. Functionally, both modules perform the same vibration termination and signal conditioning tasks within the Mark VI platform. The "CC" suffix is commonly associated with a conformal-coated version or a specific hardware revision intended for improved environmental resistance and compatibility, though exact suffix meanings should always be verified against the system documentation or GE replacement guidelines before installation.