IS200VVIBH1C | General Electric | Vibration Monitor Board

GE IS200VVIBH1C Vibration Monitor Board

The GE IS200VVIBH1C, also cataloged as the IS200VVIBH1C vibration monitor board, serves as the primary processor board used to execute vibration signal digitization and conditioning across Mark VI platforms.

Hardware Specifications

Eddy‑Current Probe Scaling and Gap Voltage Validation

Although manufactured by GE, the board is designed to process Bently Nevada‑type eddy‑current proximity probes. These probes rely on gap‑voltage interpretation, typically centered around a -10 VDC target for proper displacement scaling. The VVIB’s A/D conversion path maintains linearity across the gap‑voltage range, and its regulators provide isolated excitation to minimize cross‑talk between adjacent probe channels. This ensures stable rotor‑dynamic displacement measurement even when multiple probes share the same terminal board.

Frequently Asked Questions

Q: Can the IS200VVIBH1C be inserted or removed while the VME rack is energized? A: No. The VME rack must be powered down to avoid bus‑level signal interruption and potential probe excitation faults.

Q: How does the board affect VME backplane loading? A: The board contributes minimal static load. Probe excitation regulators draw current from the -28 VDC bus, which must be included in cabinet power calculations.

Q: Does the VVIB require firmware upgrades? A: The board contains fixed firmware within its FPGA and A/D logic. Compatibility is determined by hardware revision and system configuration, not field‑upgradeable firmware.

Field Installation Guidelines

• Ensure all probe cables are routed with proper shielding and terminate shields at the designated terminal‑board shield points.
• Maintain separation between vibration probe wiring and high‑energy conductors to reduce induced noise.
• Confirm correct seating of VME edge connectors and tighten both captive screws to secure the board mechanically.
• Verify probe excitation wiring and polarity before energizing the -28 VDC supply.
• For TMR systems, ensure proper fan‑out of probe signals to JR, JS, and JT paths to maintain redundancy integrity.