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Help CenterGE IS200TVIBH2BBB Vibration Terminal Board (TVIB)
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GE IS200TVIBH2BBB is a dedicated vibration terminal board (TVIB) for the Speedtronic Mark VI steam turbine control system (backward compatible with Mark VIe). Its core functions include providing signal termination, signal conditioning, and isolated transmission for vibration probes (such as Bently Nevada eddy current / velocity / acceleration probes), accurately delivering on-site rotor / shaft vibration signals to the VVIB vibration processing board, and working with the control system to implement real-time vibration monitoring, alarm, and interlock trip protection. As a key monitoring component for safe operation of rotating equipment including thermal power, gas turbine, and combined-cycle units, it features industrial-grade anti-interference performance, wide-temperature operation, and high reliability, making it suitable for harsh operating conditions in power plants and industrial sites.
I. Product Positioning and Multi‑Scenario Adaptability
Core Vibration Terminal for the Mark VI Series
Designed specifically for the GE Mark VI steam turbine control system and fully compatible with the Mark VIe architecture, it is standard-matched with Bently Nevada vibration probes and supports both Simplex and TMR (Triple Modular Redundancy) system configurations. It can accept up to 14 channels of vibration probes, with the first 8 channels configurable for probe type (eddy current / velocity / acceleration) via jumpers. Primarily used for real-time acquisition of shaft vibration and bearing vibration, it provides accurate signal sources for overspeed protection, vibration tripping, and condition-based maintenance of the unit, integrating directly into the Mark VI protection logic to ensure safe and stable operation of rotating equipment.
Adaptability for Industrial Automation System Integration
Seamlessly compatible with VVIB vibration processing boards, main control modules, communication modules, and power supply modules in the Mark VI/VIe system. It connects to the system backplane bus through a dedicated D-shell connector, enabling quick integration into existing steam turbine control systems without additional adaptation modules. It supports sharing vibration data with DCS systems (e.g., ABB AC800M, Siemens S7-400FH) and uploading data to plant-level supervisory systems (SIS) via OPC interfaces for centralized monitoring and data analysis. Suitable for standard industrial control cabinet rack mounting, it can directly replace legacy TVBA/TVIB terminal boards without major cabinet or wiring modifications.
Adaptability to Harsh Industrial and Extreme Conditions
Featuring industrial-grade sealing and coating design, it provides strong electromagnetic interference (EMI) resistance, vibration resistance, and wide-temperature operation, capable of withstanding high temperatures, heavy dust, and strong electromagnetic environments in boiler areas and gas turbine compartments of power plants. It meets installation requirements for control cabinets in Class I Div 2 hazardous areas and supports long-term stable operation in high-humidity and salt-spread (offshore platform) conditions. Signal channels employ photoelectric isolation and surge protection to prevent system damage from on-site high voltage and lightning strikes, and avoid false alarms / trips caused by signal distortion.
II. Functions and Technical Advantages
(I) Core Functions
Multi-Channel Vibration Signal Termination and Conditioning
Integrated dual terminal blocks support 3-wire wiring for 14 channels of vibration probes. Built-in precision resistor / capacitor networks achieve signal impedance matching and filtering to suppress high-frequency noise. The first 8 channels are equipped with JP1–JP8 jumpers for flexible configuration of probe type and measuring range, adapting to vibration sensors from different manufacturers / models without additional hardware. Conditioned signals are transmitted to the VVIB board through a dedicated interface to ensure accuracy of vibration amplitude and phase data.
Signal Isolation and Protection
Input channels are electrically isolated from the system side with an isolation voltage of up to 2500V AC, effectively blocking on-site interference signals from entering the control system. It provides overvoltage, surge, and reverse polarity protection to guard against module damage from transient voltage fluctuations and wiring errors. Supports hot-swapping (during non-interlocking periods), allowing module replacement without full system shutdown and improving system availability.
Condition Monitoring and Fault Diagnosis
Onboard status indicators visually display power supply, communication link, and channel operating status. It feeds abnormal signals such as open circuits, short circuits, and probe faults back to the Mark VI system, triggering audible and visual alarms and recording fault codes and event timestamps. Combined with ToolboxST software, it supports channel parameter configuration, fault query, and historical data traceability.
Redundancy and Expansion Compatibility
Supports TMR triple modular redundancy configuration, allowing connection of up to 3 VVIB boards simultaneously to meet high-reliability requirements in nuclear power plants and large thermal power facilities. Reserved expansion interfaces accommodate additional vibration measuring points, enabling monitoring range expansion without replacing the main board.
(II) Technical Advantages
High Reliability and Long Service Life
Constructed with industrial-grade components and coating technology, complying with IEC 60068 vibration / shock test standards. It offers industry-leading mean time between failures (MTBF), supports 24/7 uninterrupted operation, and reduces maintenance downtime. With no internal batteries or vulnerable mechanical parts, authorization and configuration data are stored in non-volatile memory, resistant to power loss and electromagnetic erasure.
High-Precision Signal Transmission
Signal bandwidth is precisely matched to probe characteristics, with vibration signal transmission latency
Strong Compatibility and Easy Integration
In addition to Bently Nevada, it is compatible with mainstream brands of eddy current / velocity / acceleration probes. It requires no custom programming and can be activated simply by parameter configuration via ToolboxST software. It connects seamlessly to the Mark VI/VIe system bus and cooperates smoothly with other I/O and protection modules, enabling rapid integration into existing control architectures.
Easy Maintenance and Convenient Commissioning
Modular design and rack mounting allow easy removal and replacement. Dual indication from status indicators and system alarm logs enables quick localization of wiring faults, probe failures, and module anomalies. Channel calibration is only required every 6 months, with no complex calibration equipment needed.
III. Application Scenarios
Power Industry (Thermal / Gas / Combined-Cycle)
Applied to shaft vibration monitoring of turbo-generator sets and gas turbines, collecting radial / axial vibration signals from high-intermediate pressure rotors, low-pressure rotors, and generator rotors. Working with the Mark VI system, it implements vibration threshold alarms and trip protection to prevent catastrophic failures such as rotor rubbing and shaft bending. It also provides data support for condition-based maintenance (CBM) to extend equipment service life.
Petrochemical and Metallurgical Industries
Used for vibration monitoring of rotating equipment including flue gas turbines in catalytic cracking units, steam turbines in metallurgical waste heat power generation units, and compressors in air separation plants. It operates stably under high-temperature, high-dust, and highly corrosive conditions, delivering equipment vibration protection and condition monitoring to reduce unplanned downtime.
Offshore Platforms and New Energy
Suitable for gas turbines / steam turbines on offshore wind and offshore oil & gas platforms, withstanding extreme salt-spread, humid, and high-vibration environments. It provides accurate vibration data for remote monitoring and safety protection of offshore equipment, and supports interlock tripping in conjunction with offshore platform SIS systems.
Retrofit of Legacy Units
Can directly replace vibration terminal boards from Mark V or other brands without modifying cabinet layout, wiring, or system protection logic. Advanced vibration monitoring functions can be activated simply by configuring probe types and verifying parameters, significantly reducing the cost and duration of unit upgrades.
IV. Technical Parameters
| Item | Specification |
|---|---|
| Model | IS200TVIBH2BBB |
| Manufacturer | GE (General Electric) |
| Product Type | Dedicated vibration terminal board (TVIB) for Mark VI/VIe |
| Supported Probe Types | Bently Nevada eddy current probes, velocity probes, acceleration probes |
| Maximum Channels | 14-channel vibration input; first 8 channels configurable via jumpers |
| Connection Interfaces | Dual terminal blocks (14 inputs), dedicated D-shell connector (for VVIB board) |
| Isolation Voltage | 2500V AC (electrical isolation between inputs and system side) |
| Operating Temperature | 0℃ ~ 60℃ (wide-temperature option: -10℃ ~ 60℃) |
| Relative Humidity | 5% ~ 95% (non-condensing) |
| Ingress Protection | IP20 (cabinet installation only) |
| EMC Immunity | Compliant with EN 61000-6-2/4 industrial standards |
| Mounting | Standard rack mounting for Mark VI systems |
| Supporting Software | GE ToolboxST |
| Compatible Systems | GE Speedtronic Mark VI, compatible with Mark VIe steam turbine control systems |
| Supported Configurations | Simplex, TMR (Triple Modular Redundancy) |
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