Description
DS3800DGRD1C1ABA: Product Overview
The DS3800DGRD1C1ABA is a low-profile auxiliary logic board that plugs onto a motherboard carrier inside the Mark IV rack. It is passive (no active silicon) and jumper-configurable, providing pull-up/pull-down networks, contact wetting, and auxiliary LED drive circuits that are routed to front-panel switches, local indicators, or interposing relays. The card is hardware-only, making it deterministic and suitable for safety-related mode selection or local indication when triple-redundant.
Physical implementation includes blue jumper blocks (visible through the front bezel), precision pull-up resistors, TVS surge suppressors, and gold-plated edge fingers. The 20-pin ribbon carries logic levels and contact returns; keyed to prevent mis-insertion under vibration. No trim-pots or firmware are present—all functions are selected by jumper position, ensuring 25-year configurability without software dependency.
Environmental qualification meets –20 °C to +70 °C, CE emissions, and IEEE 344 form-factor, giving >20-year service life in baseload duty.
GE DS3800HPRB1B1B
DS3800DGRD1C1ABA: Technical Specifications
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Model Number: DS3800DGRD1C1ABA
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Manufacturer: General Electric (GE Energy)
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Product Type: Auxiliary / General-Purpose Logic Board
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System Compatibility: Speedtronic Mark IV (6BA01/02 daughterboard slot)
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Function: Jumper-configurable logic, pull-up/down networks, auxiliary LED drive
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Configuration: Blue jumper blocks (≈20 positions), passive design
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Isolation: 500 V DC board-to-ground (standard Mark IV)
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Connectors: 20-pin ribbon, keyed, gold-plated
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Power Rails: +5 V logic, <0.2 W total
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Surge Protection: TVS diodes on every line, >500 V clamp
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Temp Range: -20 °C to +70 °C operational, -40 °C to +85 °C storage
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Certifications: CE, RoHS, Mark IV form-factor compatible
Core Features & Customer Value
Passive, Deterministic Logic
No active silicon means no firmware crashes, no latch-up, and no thermal runaway—ideal for safety-critical mode selection or local indication that must survive CPU reboots.
No active silicon means no firmware crashes, no latch-up, and no thermal runaway—ideal for safety-critical mode selection or local indication that must survive CPU reboots.
Hot-Swappable in TMR Strings
Daughterboard form allows online replacement in <3 min; remaining two legs continue logic voting, achieving >99.97 % availability on combined-cycle fleets.
Daughterboard form allows online replacement in <3 min; remaining two legs continue logic voting, achieving >99.97 % availability on combined-cycle fleets.
Field-Configurable Without Software
Blue jumpers select pull-up/down, contact wetting, or LED drive—technician can re-purpose for different mode switches or indicator lamps using only a tweaker and the silk-screen legend, no laptop required.
Blue jumpers select pull-up/down, contact wetting, or LED drive—technician can re-purpose for different mode switches or indicator lamps using only a tweaker and the silk-screen legend, no laptop required.
Harsh-Site Ready
-20 °C to +70 °C, conformal coat, and gold-edge fingers survive turbine-deck vibration, salt-fog, and coal-dust, delivering >20-year life without scheduled replacement.
-20 °C to +70 °C, conformal coat, and gold-edge fingers survive turbine-deck vibration, salt-fog, and coal-dust, delivering >20-year life without scheduled replacement.
GE DS3800HPRB1B1B
Typical Applications
Gas Turbine Mode Selection Switching
Primary auxiliary for Frame 7/9 Mark IV racks: routes crank/fire/run mode switches, local/remote select, and emergency-stop contacts to CPU logic. Passive design survives CPU reboots, ensuring mode integrity during start-ups .
Primary auxiliary for Frame 7/9 Mark IV racks: routes crank/fire/run mode switches, local/remote select, and emergency-stop contacts to CPU logic. Passive design survives CPU reboots, ensuring mode integrity during start-ups .
Steam Turbine Local Indication
Drives front-panel LEDs for governor mode, trip status, and bearing temperature alarms in steam turbine Mark IV retrofits. Deterministic LED drive prevents false indications during transients.
Drives front-panel LEDs for governor mode, trip status, and bearing temperature alarms in steam turbine Mark IV retrofits. Deterministic LED drive prevents false indications during transients.
Remote Site & Island Mode Operation
Long-cable contact returns from offshore pendant stations are pulled-up and filtered, eliminating need for external relay panels and reducing cable count by 30 % .
Long-cable contact returns from offshore pendant stations are pulled-up and filtered, eliminating need for external relay panels and reducing cable count by 30 % .
