The GE IS200ISBBG2AAB is an ISBus Bypass Board (Functional Acronym: ISBB) for the GE Mark VI Speedtronic Turbine Control System. As a replacement model for the IS200ISBBG2A, it is primarily used to maintain the fail-safe continuity of the InSync Bus during system maintenance or module replacement, while providing signal isolation and terminating resistor management to ensure stable communication for critical processes such as excitation control within the Mark VI System. It is compatible with the EX2100 series excitation control systems, is typically mounted on DIN rails, and features high reliability and ease of maintenance.
Key Technical Specifications
Model: IS200ISBBG2AAB (replaces IS200ISBBG2A)Series: GE Mark VI SpeedtronicBoard Type: ISBus Bus Bypass Board (ISBB)Hardware Version: AFunction Version: ALayout Version: BOperating Voltage: 24VDC (compatible with InSync Bus)Mounting Method: DIN rail mounting, fixed to the bottom of the board via 6 pre-drilled holesConnector Configuration: 2-position terminal block + 3 right-angle plug connectorsPlace of Production: USAWarranty Period: 1 year
Weight: Approx. 0.31 lbs (excluding packaging)
Core Positioning and Application Scenarios
This board is a critical communication support component of the Mark VI control system, with its core function serving as a passive/semi-active middleware for the InSync Bus. It automatically bypasses and maintains the bus signal path when field I/O modules, controllers or protective relays are removed for maintenance, preventing the interruption of the entire bus communication caused by the maintenance of a single component. It is typically applied in the excitation control systems of gas and steam turbines (e.g., the EX2100 series) and compatible with 3300V and 6600V medium-voltage SP drives. It is especially suitable for turbine excitation environments where control loops are tightly coupled and susceptible to electrical noise and transient interference, and can enhance the anti-interference capability and operational continuity of the system. Meanwhile, this board can also be used as a replacement or spare part for aging systems to reduce downtime and ensure the stability of industrial production.
Functional Features
- Bus Bypass and Fail-Safe Protection: It ensures the signal continuity of the 24VDC InSync Bus during module hot-swapping or maintenance, prevents system faults caused by bus interruption, supports online system maintenance and improves operation and maintenance efficiency.
- Signal Isolation and Anti-Interference: It achieves electrical isolation between various segments of the control bus via optical isolators or isolation transformers, suppresses electrical noise and transient interference, protects the integrity of bus signals, and is suitable for harsh industrial electromagnetic environments.
- Terminating Resistor Management: It supports terminating resistor configuration, effectively prevents signal reflection in long-distance or branch networks, optimizes the transmission quality of bus signals and ensures communication stability.
- Convenient Connection and Configuration: Equipped with a 2-position terminal block and three right-angle plug connectors, all arranged on the short edges of the board for easy installation and maintenance. Jumper settings, terminal blocks and female connectors provide flexible configuration options and support the quick connection of power supplies and signals.
- Status Indication and Diagnostics: Integrated LED indicators intuitively feed back key information such as power supply and bus status, helping operation and maintenance personnel quickly locate faults. Pre-reserved test points support signal access and diagnostics, simplifying the fault troubleshooting process.
Key Installation and Maintenance Guidelines
Installation Specifications
Mount the board in strict compliance with DIN rail installation standards and ensure connectors face a direction that facilitates wiring and maintenance. Prior to installation, inspect the board for no physical damage, confirm connectors are secure, and verify that jumper settings meet system requirements.
Wiring Requirements
Differentiate between power and signal terminals to avoid reverse connection; connect InSync Bus signals to the corresponding right-angle plugs correctly and ensure bus polarity and impedance matching; configure terminating resistors appropriately based on bus length and topology.
Maintenance Recommendations
Use LED indicators to quickly determine the status of the board and bus; regularly inspect the tightness of connectors and contact condition of terminal blocks to prevent signal abnormalities caused by loosening; perform signal detection via pre-reserved test points to identify potential faults in advance.
Compatibility
This board is compatible with the Mark VI Speedtronic system and EX2100 excitation control system, and can directly replace old boards of the same model. Prior to replacement, confirm the matching of hardware and functional versions to avoid compatibility issues.
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