General Electric | IS200VVIBH1CAB | Mark VI Vibration Monitoring Terminal Board

Product Description

The IS200VVIBH1CAB (Part Number: IS200VVIBH1CAB) is a high-density terminal board engineered by General Electric for the Mark VI Speedtronic control system. Primarily serving as the physical interface for vibration and seismic monitoring, this board facilitates the precise acquisition and conditioning of sensor data from rotating machinery. While often categorized alongside temperature devices, the IS200VVIBH1CAB is specialized for vibration probes, seismic transducers, and Proximitor signals, providing the necessary buffering to ensure signal integrity across long cable runs.

Designed for high-performance data acquisition, the IS200VVIBH1CAB supports 26 total channels and is capable of interfacing with up to 14 vibration probes. The board utilizes high-resolution analog-to-digital conversion, leveraging a 16-bit A/D converter that maintains an effective resolution of 14 bits. It also features a regulated power management system that steps down a -28V DC bus to a stable -24V DC to power field transducers. Its robust design allows for the interconnection of two TVIB boards to expand signal processing capabilities for complex turbine monitoring applications.

Technical Specifications

• Manufacturer: General Electric (GE)

• Model Number: IS200VVIBH1CAB

• Total Channel Count: 26 Channels

• Vibration Probe Capacity: Processes up to 14 discrete vibration signals

• Conversion Resolution: 16-bit A/D (14-bit effective resolution)

• Amplitude Accuracy: 0.1% for buffered outputs

• Input Power Supply: -28V DC Bus

• Transducer Power Output: Regulated -24V DC

• Transducer Load Capacity: 12 mA per transducer

• Physical Dimensions: 33.0 cm (H) x 17.8 cm (W)

• Origin: United States (USA)

• System Compatibility: GE Mark VI Speedtronic Series

Application and Monitoring Capability

This terminal board is typically installed in the control cabinet of steam or gas turbines to monitor shaft vibration, axial position, and casing expansion. By providing buffered outputs, the IS200VVIBH1CAB allows the raw vibration signal to be shared with external analysis equipment (such as Bently Nevada systems) without degrading the signal being sent to the Mark VI controller for protective tripping or alarming.

Technical FAQ

What is the significance of the buffered outputs on the IS200VVIBH1CAB?Buffered outputs provide a low-impedance replica of the transducer signal. This ensures that connecting external diagnostic tools or secondary monitoring systems does not "load down" the primary signal, maintaining an amplitude accuracy of 0.1% for critical protection logic.

How does the board handle transducer power?The board features an internal DC-DC regulation stage. It takes the standard -28V DC distribution power and provides a clean, current-limited -24V DC supply specifically for powering Proximitor sensors and other vibration transducers, supporting a standard load of 12 mA per device.