IS200TVIBH2B Vibration Terminal Board | GE Fanuc

Configured for high-frequency signal acquisition in Mark VI control platforms, the GE IS200TVIBH2B (IS200TVIBH2B Vibration Terminal Board) provides direct physical/electrical execution of transducer interfacing for mechanical monitoring.

Hardware Specifications

Eddy-Current Probe Scaling and Signal Processing

The IS200TVIBH2B serves as the interface between turbine-mounted transducers and the VVIB processing boards. It supports multiple probe technologies, including Proximitors and seismic sensors. To ensure accurate rotor dynamics analysis, the board facilitates consistent signal path impedance, allowing for precise eddy-current probe scaling. This configuration ensures that gap voltage validation remains within the operational -10 VDC target range. The terminal board maintains signal integrity to enable effective cross-talk suppression between the 13 channels before the signals are routed to the VVIB boards for analog-to-digital conversion and subsequent transmission via the VME bus to the central controller.

Frequently Asked Questions

Q: Does the IS200TVIBH2B support hot-swapping?

A: Hot-swapping the terminal board is restricted due to the direct electrical connection with active vibration probes. Isolation of the VVIB power supply is required prior to removal to prevent transient voltage spikes on the transducer loops.

Q: How are TMR (Triple Modular Redundancy) configurations managed?

A: In TMR mode, the terminal board distributes signals to three concurrent VVIB processing units. The system controller performs voting logic on the digitized signals to reject outlier data caused by individual channel faults.

Field Installation Guidelines

1. Mounting: Secure the board into the designated Mark VI rack slot. Verify that the rear-plane connectors are fully seated to maintain ground continuity, which is required for low-noise sensor signal acquisition.
2. Shielding: All transducer cabling must use high-quality shielded twisted-pair conductors. Terminate shields at the cabinet-level grounding bar using 360-degree clamps to minimize susceptibility to electromagnetic interference.
3. Probe Wiring: Ensure that the wiring polarity matches the transducer requirements (e.g., Bently Nevada interface standards). Improper wiring can invert signal polarity, leading to incorrect rotor position or vibration amplitude data.
4. Thermal Management: Maintain clear airflow paths in the Mark VI cabinet. The 0 to 60 deg C operating range must be strictly observed to prevent thermal drift in the analog input circuits, which would invalidate rotor dynamic measurements.