The GE IS200WROBH1A (including version IS200WROBH1ABA) is a specialized Relay Power Sensing Board developed by General Electric for the Mark VI Speedtronic turbine control system. This board is essential for monitoring and managing the status of relay outputs and sensing power distribution within the control cabinet. It provides the critical link between high-level control logic and the physical operation of industrial relays, ensuring that power levels are maintained within safe operational limits for heavy-duty turbine applications.
Product Specifications and Datasheet
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Model Number: IS200WROBH1A / IS200WROBH1ABA
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Series: Mark VI Speedtronic Control System
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Function: Relay Output and Power Sensing
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Input Voltage Compatibility: 125 V DC or 115/230 V AC (System dependent)
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Relay Channels: Integrated support for multiple relay contact outputs
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Sensing Capability: Real-time monitoring of relay status and power supply health
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Configuration: Standard “WROB” board architecture
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Dimensions: 178 mm x 127 mm (Approximate standard GE PCB size)
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Weight: 0.65 kg
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Country of Origin: USA
Application Areas
The IS200WROBH1A is a vital component in power generation and heavy industry infrastructure, specifically:
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Gas Turbine Control: Managing the trip and control relays for GE Frame series gas turbines.
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Steam Turbine Management: Monitoring power sensing lines for auxiliary steam control systems.
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Power Plant Automation: Serving as a power distribution interface in Mark VI control cabinets.
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Industrial Drive Systems: Used in large-scale motor control centers where relay-based safety interlocks are required.
Product Instructions for Use
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Board Handling: This board contains static-sensitive components. Always wear an anti-static wrist strap and handle the board by its edges during installation or removal.
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Mounting: Slide the board into its dedicated slot in the Mark VI rack or VME rack. Ensure the plastic ejector tabs are fully seated and the board is locked in place.
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Connection: Connect the wiring harnesses to the front-facing connectors (typically J-type connectors). Verify that all wire labels match the terminal designations in the system schematics.
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Testing: Once powered, use the GE Toolbox software to verify that the relay sensing logic is reporting the correct status (Open/Closed) and that the power sensing diagnostics show no under-voltage conditions.
Q&A: Frequently Asked Questions
Q1: What is the difference between the IS200WROBH1A and the IS200WROBH1ABA versions? A1: The “ABA” suffix usually denotes a specific revision or artwork change in the PCB manufacturing process. In most Mark VI applications, these versions are functionally interchangeable.
Q2: Does this board include the actual physical relays? A2: Yes, the WROB series boards typically feature integrated relays that are controlled by the system’s I/O processor and sensed by the board’s internal feedback circuits.
Q3: Can I replace this board while the turbine is running? A3: Replacing this board while the system is “online” is generally not recommended unless the system is specifically configured for redundant operation and the proper bypass procedures are followed.
Recommended Similar Models
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IS200WROGH1A: A related Relay Output board often used in different Mark VI rack configurations.
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IS200TRLYH1B: Terminal Relay board used as the interface between field wiring and control logic.
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IS200VPROH1B: Turbine Protection board that often works in conjunction with relay sensing boards.
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IS200VVBP H1A: VME Backplane board that provides the structural support for the WROB series.
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IS200TBCIH1C: Contact Input Terminal board for monitoring field switches and contacts.
