GE IS220PVIBH1A Mark VIe Vibration Monitor I/O Pack

GE IS220PVIBH1A Mark VIe Vibration Monitor I/O Pack (PVIB)

The GE IS220PVIBH1A is a dedicated Vibration Monitor (PVIB) I/O pack developed for the General Electric Speedtronic™ Mark VIe control platform. Operating as an autonomous, microprocessor-based distributed node, the module converts raw AC dynamic vibration, DC proximity gap, and shaft position signals from industrial turbomachinery into digitized process values.

The PVIB pack interfaces directly with the IS200TVBAH2A / TVBA Vibration Terminal Board via a high-density 37-pin sub-D connector, eliminating intermediary wiring harnesses and external signal conditioners. Internally, the hardware architecture is built on a high-speed DSP engine coupled with the Analog Filter Acquisition Board (BAFA) and Analog Processing Daughterboard (KAPA). It provides onboard signal conditioning, dynamic windowed peak-detection, digital band-pass/tracking filtering, and real-time calculation of overall dynamic amplitudes, 1X/2X vector extraction, and Keyphasor® shaft speed metrics.

Model Details

• Manufacturer: General Electric
• Part Number (MPN): IS220PVIBH1A
• Functional Acronym: PVIB (Vibration Input Module)
• Control Platform: Mark VIe Distributed Control System (DCS)
• PCB Assembly Revisions: BAFA & KAPA internal daughterboards

Features

1. 13-Channel Multi-Transducer Acquisition: Directly digitizes dynamic signals from eddy-current proximitors, seismic velocity pickups (velomitors), piezoelectric accelerometers, and optical/magnetic Keyphasor® pulse pickups without external charge amplifiers.
2. Integrated Synchronous Vector & Gap Processing: On-module digital signal processing computes overall peak-to-peak displacement, average DC gap voltage, synchronous 1X and 2X filtered vibration vectors, and machine RPM.
3. Dual Redundant IONet Architecture: Equipped with twin 10/100Base-TX auto-negotiating RJ-45 Ethernet ports, supporting uninterrupted deterministic communication and bumpless switchover across dual networks.
4. High-Speed Deterministic Frame Rates: Configurable update cycles at 3.125 Hz, 6.25 Hz, 12.5 Hz, 25 Hz, 50 Hz, and 100 Hz to handle both steady-state machine monitoring and fast transient run-up/coast-down trips.
5. TMR Safety Voting & Buffered BNC Feeds: Fully compatible with Simplex, Dual, or Triple Modular Redundant (TMR) architectures. When coupled to IS200TVBAH2A, it supplies isolated, buffered raw BNC outputs for parallel route-based vibration analyzers or external Bently Nevada rack systems.

Compatibility

• Direct Terminal Boards: Specifically engineered for the IS200TVBAH1A and IS200TVBAH2A Vibration Terminal Boards. (Note: Not backward-compatible with legacy Mark VI IS200TVIB boards without interface conversion).
• Power Supplies: Integrates with Mark VIe IS200WNPSH1A -28V/-24V negative power supply daughter modules installed on the TVBA base.
• Supported Turbomachinery Controllers: Compatible with GE Mark VIe, Mark VIeS Safety Systems, and Speedtronic platforms managing heavy-duty frame gas turbines (Frame 5, 6B, 7EA/FA, 9E/FA), LM series aero-derivative units (LM2500, LM6000), and large industrial steam turbines.
• Redundancy Models: Fully operational in Simplex configurations (single TVBA with one PVIB) and Triple Modular Redundancy (TMR) setups utilizing three IS220PVIBH1A packs mounted across designated R, S, and T ports on the TVBA terminal board.

Part Number Cross-References

• Base Part Number: IS220PVIBH1A
• Revision Codes: IS220PVIBH1A Rev A through Rev K
• Compatible Terminal Assembly: IS200TVBAH1A, IS200TVBAH2A
• Sub-Assembly PCB Codes: BAFA (Analog Filter Acquisition), KAPA (Analog Processor)
• Excitation Power Daughterboard: IS200WNPSH1A

Applications

• Turbine Supervisory Instrumentation (TSI): Shaft absolute and relative vibration monitoring on marine gas turbine propulsion systems and commercial power generation sets.
• Axial Thrust & Rotor Position Monitoring: Early detection of bearing wear, axial float displacement, and rotor differential thermal expansion.
• Aeroderivative Casing Health: Wideband acoustic and accelerometer spectral monitoring across high-pressure compressor (HPC) and power turbine (PT) bearing housings.
• Hydroelectric & Industrial Turbocompressors: Continuous dynamic balance surveillance, phase-angle phase vectoring, and runaway RPM tripping logic.

Frequently Asked Questions

What is the primary function of the GE IS220PVIBH1A module?

The GE IS220PVIBH1A is a dedicated vibration acquisition I/O pack within the GE Mark VIe control platform. It samples, filters, and processes signals from proximitors, seismic velocity sensors, accelerometers, and Keyphasors, transmitting calculated digital data (such as overall vibration, DC gap, and 1X/2X vectors) directly over redundant IONet Ethernet channels to turbine controllers.

Can the IS220PVIBH1A replace an external Bently Nevada 3500 monitoring system?

Yes. In many modern gas and steam turbine configurations, the combination of the IS220PVIBH1A I/O pack and the IS200TVBAH2A terminal board integrates continuous API-670 machine protection and supervisory vibration monitoring directly into the Mark VIe DCS, removing the need for a standalone 3500 rack while providing buffered raw outputs for auxiliary diagnostic analyzers.

Does the IS220PVIBH1A support hot-swapping in an online system?

Yes, the module supports online replacement in redundant (TMR) systems. When replaced, the new module’s soft-start circuit regulates inrush current, and Mark VIe auto-reconfiguration downloads the appropriate channel assignments and firmware straight from the active controller.

What is the difference between the IS220PVIBH1A and earlier IS200TVIB boards?

The IS220PVIBH1A is an intelligent, self-contained processing pack that mounts directly onto a TVBA terminal board and communicates digitally via Ethernet (IONet). The legacy IS200TVIB is a passive, VME-rack-connected Mark VI board that relies on central rack-mounted processing modules and ribbon cabling. The PVIB architecture eliminates analog signal loss over long cabinet runs.

How are seismic sensors and proximity probes configured on the 13 channels?

Channels 1 to 3 support proximitors, accelerometers, and velomitors; channels 4 to 8 handle proximitors, velomitors, and seismic sensors; channels 9 to 12 are designated for proximity probes (bearing radial and axial measurements); and channel 13 is dedicated to Keyphasor pulse or phase reference tracking. Specific scale factors and bias voltages are defined within the GE ControlST/ToolboxST software suite.