The GE IS200JPDBG1A (revision code IS200JPDBG1ABB, functionally known as the JPDB board) is a Power Distribution Board manufactured by General Electric for the Speedtronic Mark VI turbine control system.
The JPDB board distributes regulated 24V DC power from system power supply modules to local terminal boards, I/O packs, and control racks within the Mark VI turbine control cabinet. It incorporates circuit protection, status indication, and diagnostic feedback to ensure reliable power delivery across critical turbine safety and control loops.
Part Number & Revision Breakdown
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IS200: Standard internal GE Speedtronic Mark VI circuit board assembly prefix.
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JPDB: Power Distribution Board functional acronym.
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G1: Group 1 standard hardware configuration.
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A: Base artwork revision.
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ABB: Functional revision level:
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A = First functional release revision
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B = Second component engineering revision
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B = Conformal coating applied for harsh turbine room environments
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Technical Specifications
| Parameter | Specification |
| Manufacturer | General Electric (GE Power / GE Vernova) |
| System Compatibility | Speedtronic Mark VI Control System |
| Part Number | IS200JPDBG1A / IS200JPDBG1ABB |
| Board Acronym | JPDB (Power Distribution Board) |
| Input Voltage | Nominal 24V DC (Dual Redundant Supply Bus Inputs) |
| Output Channels | Multiple Fused 24V DC Distribution Outlets |
| Circuit Protection | Onboard status-monitored fuses / Solid-state limiters |
| Diagnostic Monitoring | Onboard LED indicators + diagnostic voltage feedback to main processor |
| Operating Temperature | -30°C to +65°C (-22°F to +149°F) |
| Form Factor | Cabinet-Mounted Printed Circuit Board |
Core Features & Operating Capabilities
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Dual Power Input Redundancy: Accepts dual 24V DC bus inputs to allow seamless failover protection without interrupting power to connected I/O cards or sensor loops.
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Individual Circuit Protection: Features onboard fuses and current limiters for each power output branch to prevent a localized short circuit in field wiring from taking down the entire control rack.
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Real-Time Diagnostics: Monitors output voltage levels and fuse integrity, sending immediate feedback signals to the Mark VI processor for alarm logging in the CIMPLICITY / HMI workspace.
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Visual Status LEDs: Equipped with green power-present LEDs and red blown-fuse indicator LEDs for fast visual inspection inside the control cabinet.
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Conformal Coating: The ABB sub-revision includes conformal coating to protect component solder joints against atmospheric moisture, chemical vapors, and particulate accumulation in turbine halls.
Related GE Mark VI Power & Control Components
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IS200JPDFG1A / JPDF — Power Distribution Module with ground-fault detection capabilities.
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IS200JPDCG1A / JPDC — Power Distribution Card for specialized Mark VI sub-racks.
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IS200PPDAH1B / PPDA — Power Distribution System Processor / Diagnostic Pack (Mark VIe).
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IS200TRLYH1B / TRLY — Relay Terminal Board driven by 24V DC power distribution loops.
