Description
- Model: IS200TVBAH2ACC
- Brand: General Electric (GE)
- Series: Mark VIe
- Function: Vibration and Proximity Sensor Termination
- Channels: Supports multiple channels for seismic, accelerometers, and Proximitor* probes.
- Compatibility: Interfaces with the PVIB (Vibration) I/O Pack via high-density D-connectors.
- Sensor Support: Configurable for Bently Nevada* 3300/3300 XL Proximitor systems, Velomitor* sensors, and seismic pickups.
- Signal Conditioning: Includes passive circuitry to filter high-frequency noise and provide stable bias voltage to sensors.
- TMR Capability: Designed to route signals to three redundant I/O packs (<R>, <S>, <T>) simultaneously for 2-out-of-3 voting logic.
- Hardware ID: Features an onboard EPROM that allows the Mark VIe controller to automatically recognize the board type and revision.
- Terminal Blocks: High-quality barrier-style or Euro-style terminals for secure field wiring (typically supports 18-22 AWG).
- Voltage Rails: Distributes -24 V DC power for proximity probe transducers.
GE IS200TVBAH2ACC
GE IS200TVBAH2ACC
GE IS200TVBAH2ACC
Installation & Configuration Guide
Phase 1: Pre-Installation (Preparation)
⚠️ Critical Warning: Vibration protection is usually “Hard-Tripping” logic. A sudden loss of signal or a loose wire on the TVBA board can cause an immediate, high-load turbine trip.
- Force/Bypass: In ToolboxST, ensure vibration trips are bypassed or the machine is in a “Safe” state before replacing the board.
- Verify Voltages: Ensure the -24 V DC supply is within tolerance; improper voltage can lead to “Probe Error” diagnostics.
- ESD Protection: Use a grounded wrist strap to prevent damage to the onboard ID chip and filter capacitors.
Phase 2: Removal & Replacement
- Mark Cables: Label every probe lead (e.g., “Bearing 1 X-Prox”, “Bearing 1 Y-Prox”).
- Disconnect I/O Packs: Unplug the PVIB packs from the board’s D-connectors.
- Mounting: Unscrew the board from the cabinet frame. Inspect the mounting base for any dust or metallic debris that could cause a short circuit.
Phase 3: Commissioning
- Reseat Pack: Plug the PVIB pack(s) into the new IS200TVBAH2ACC.
- Calibration: While the board is passive, you must verify that the Gap Voltage for proximity probes matches the previous values. Use a multimeter to verify the -24V supply at the terminals.
- Diagnostic Check: Verify that the “Hardware Mismatch” alarms are cleared in the controller once the board is identified.
Customer Cases & Industry Applications
Case 1: Resolving Nuisance Vibration Trips A power plant in South America suffered from random “High Vibration” trips on their gas turbine. They found that the original TVBA board had a failing cold-solder joint on one of the filter capacitors, causing signal spikes. Replacing the unit with a New Surplus IS200TVBAH2ACC provided a clean signal path, eliminating the false trips and restoring plant reliability.
Case 2: Post-Lightning Strike Recovery During a severe storm, a surge entered the field wiring and damaged the input stage of a vibration rack. The site was down and unable to restart without vibration monitoring. We provided two New Surplus TVBA boards within 48 hours. The “H2ACC” revision was a perfect match for their Mark VIe cabinet, allowing them to resume generation with minimal downtime.
Frequently Asked Questions (FAQ)
Q: Can I use this for a 3-wire accelerometer? A: Yes, the TVBA board is designed to handle various sensor types, but the specific configuration is handled in the ToolboxST hardware configuration settings. Ensure the jumpers (if any) and software settings match your sensor type.
Q: What is the difference between H2A and H2ACC? A: The “ACC” suffix is a minor hardware revision code. GE typically ensures that “ACC” is backward compatible with “A” or “AB” versions, though it often includes improved manufacturing processes or more robust components.
Q: Do you offer the PVIB I/O pack as well? A: Yes, we often stock the IS230PVIBH1A packs that pair with this board. Replacing both the board and the pack is recommended if you have experienced a major electrical surge.
Q: Why choose New Surplus? A: In vibration monitoring, precision is everything. A “Used” board might have degraded capacitors that shift the signal frequency, leading to inaccurate readings. New Surplus ensures the board meets its original factory-tested tolerances for signal integrity.
