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The GE IS200ISBEH2ACC is an InSync Bus Extender Card (ISBE) manufactured by General Electric.1 It is used as a utility component in high-reliability control systems, primarily the Mark VI Speedtronic Turbine Control System and the EX2100 Excitation System.
Its core function is to facilitate the physical expansion of the control system by extending the range and maintaining the integrity of the proprietary ISBus communication network.
⚙️ Core Function and System Role
The ISBE board is crucial for accommodating larger or geographically separated control components:
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ISBus Extension: The main purpose is to provide a reliable interface for extending the physical length and branching capability of the high-speed, synchronous ISBus communication line. This is necessary when control components are housed in separate cabinets or located farther apart than the standard backplane permits.
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Signal Integrity: To ensure the signal remains viable over longer distances, the board incorporates active circuitry (such as buffers, repeaters, or drivers) to recondition and amplify the ISBus signal. This maintains the precise timing and integrity essential for the “InSync” synchronization and voting logic in Triple Modular Redundant (TMR) systems.
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Fiber-Optic Capability: Like other ISBE revisions, this board is typically equipped with fiber-optic connectors (often ST-type). This allows the electrical ISBus signal to be converted into an optical signal, which provides noise immunity and allows for reliable data transmission over long distances (e.g., between separate equipment rooms or buildings).
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Mounting: It is designed to plug into the control rack’s backplane, often interfacing with the Control Assembly Backplane (CAPB) board.
🔎 Revision Details
The suffix H2ACC indicates a specific evolution and manufacturing revision of the board:
| Part Segment | Meaning |
| IS200 | GE’s Innovation Series of control modules. |
| ISBE | ISBus Extender Board (Functional Acronym). |
| H2A | Hardware Group 2, Artwork Revision A (a later, updated design from the H1 series). |
| CC | Assembly/Manufacturing Revisions (minor production changes or component sourcing updates that do not change the core function). |
Would you like to search for the specific fiber-optic cable requirements for connecting to the IS200ISBEH2ACC, or the maximum length the ISBus can be extended?
The GE IS200ISBEH2ACC is an InSync Bus Extender Card (ISBE) manufactured by General Electric. It is used as a utility component in high-reliability control systems, primarily the Mark VI Speedtronic Turbine Control System and the EX2100 Excitation System.
Its core function is to facilitate the physical expansion of the control system by extending the range and maintaining the integrity of the proprietary ISBus communication network.
⚙️ Core Function and System Role
The ISBE board is crucial for accommodating larger or geographically separated control components:
-
ISBus Extension: The main purpose is to provide a reliable interface for extending the physical length and branching capability of the high-speed, synchronous ISBus communication line. This is necessary when control components are housed in separate cabinets or located farther apart than the standard backplane permits.
-
Signal Integrity: To ensure the signal remains viable over longer distances, the board incorporates active circuitry (such as buffers, repeaters, or drivers) to recondition and amplify the ISBus signal. This maintains the precise timing and integrity essential for the “InSync” synchronization and voting logic in Triple Modular Redundant (TMR) systems.
-
Fiber-Optic Capability: The board is typically equipped with fiber-optic connectors (e.g., ST-type) that allow the electrical ISBus signal to be converted into an optical signal. This provides excellent noise immunity and allows for reliable data transmission over long distances (e.g., between separate equipment rooms or buildings).
🔎 Revision Details and Fiber-Optic Range
The suffix H2ACC indicates a specific evolution and manufacturing revision of the board:
| Part Segment | Meaning |
| IS200 | GE’s Innovation Series of control modules. |
| ISBE | ISBus Extender Board (Functional Acronym). |
| H2A | Hardware Group 2, Artwork Revision A (a later, updated design from the H1 series). |
| CC | Assembly/Manufacturing Revisions (minor production changes or component sourcing updates). |
While the specific, exact maximum distance for the ISBus using the IS200ISBEH2ACC is often found only in official GE documentation (which was not returned by the search), the presence of fiber-optic capability allows for significantly extended range:
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Multimode Fiber: Typical maximum distances for industrial multimode fiber (often used for shorter distances like inter-cabinet runs) are generally less than 2 kilometers.2 The exact limit depends on the fiber type (OM1, OM2, OM3, etc.) and the data speed required.3
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Single-Mode Fiber: If the ISBE supports single-mode fiber, the distance can be extended dramatically, potentially up to 160 kilometers or more, though industrial control applications typically do not require this extreme range.
