Description
DS3800NFCD1J1D: Product Overview
The DS3800NFCD1J1D is a daughterboard-grade firing circuit that occupies a 6BA07 slot in the GE Speedtronic Mark IV rack. It receives low-voltage logic pulses from the CPU over the VME back-plane, converts them into high-energy firing pulses, and drives ignition transformers, flame scanners, and exciter field contactors during gas-turbine start-up, acceleration, and black-start sequences. The card is hardware-configured (no firmware) and deterministic, making it suitable for safety-related firing control when triple-redundant.
Physical implementation includes high-voltage MOSFETs, pulse transformers, galvanic isolation, and TVS surge suppressors. Dual 96-pin VME edge connectors mate with the CPU and I/O motherboards; gold-plated fingers ensure 25-year contact life in high-vibration environments. Front-edge LEDs (green = pulse active, red = fault/over-temperature) give real-time firing status—no oscilloscope required during commissioning.
Environmental qualification meets –20 °C to +70 °C, IEEE 344 form-factor, and CE emissions, giving >20-year service life in baseload duty.
DS3800NFCD1J1D
DS3800NFCD1J1D: Technical Specifications
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Model Number: DS3800NFCD1J1D
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Manufacturer: General Electric (GE Energy)
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Product Type: Firing Circuit Board (Ignition Driver)
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System Compatibility: Speedtronic Mark IV (6BA07 slot)
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Input: 5 V logic pulses from CPU (VME back-plane)
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Output: High-energy firing pulses (up to 200 V, 5 A for 10 ms)
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Channels: Multiple firing channels (typically 4–8, jumper-selectable)
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Isolation: 1500 V AC board-to-ground, 500 V channel-to-channel
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Protection: TVS diodes, over-current shut-down, thermal limit
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Connectors: Dual 96-pin VME, gold-plated edge fingers
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Indicators: Green = pulse active, Red = fault / thermal limit
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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, IEEE 344 form-factor compatible
Core Features & Customer Value
High-Energy Pulse Generation for Reliable Ignition
200 V / 5 A pulses ensure reliable ignition transformer firing even with long cable runs, high contact resistance, or low battery conditions—critical for cold starts and black-start island mode.
200 V / 5 A pulses ensure reliable ignition transformer firing even with long cable runs, high contact resistance, or low battery conditions—critical for cold starts and black-start island mode.
Hot-Swappable in TMR Strings
Redundant Mark IV allows online replacement of one firing card; remaining two legs continue ignition sequencing, achieving >99.97 % start reliability on combined-cycle fleets.
Redundant Mark IV allows online replacement of one firing card; remaining two legs continue ignition sequencing, achieving >99.97 % start reliability on combined-cycle fleets.
Field-Configurable Without Software
Jumpers select pulse width, channel enable, and firing sequence—technician can adapt to different ignition transformers or flame scanners using only a tweaker and the silk-screen legend, no OEM software required.
Jumpers select pulse width, channel enable, and firing sequence—technician can adapt to different ignition transformers or flame scanners using only a tweaker and the silk-screen legend, no OEM software required.
Surge-Hardened for Turbine Deck
TVS diodes clamp >500 V spikes from lightning, exciter flash-over, or contactor arcing. 1500 V isolation prevents ground-fault propagation to CPU cards, reducing unplanned replacement by >60 % compared with commercial firing boards.
TVS diodes clamp >500 V spikes from lightning, exciter flash-over, or contactor arcing. 1500 V isolation prevents ground-fault propagation to CPU cards, reducing unplanned replacement by >60 % compared with commercial firing boards.
DS3800NFCD1J1D
Typical Applications
Gas Turbine Ignition & Flame Detection
Primary firing driver for Frame 7/9 heavy-duty units: outputs high-energy pulses to ignition transformers and flame scanner power supplies during start-up, ensuring reliable light-off and flame confirmation.
Primary firing driver for Frame 7/9 heavy-duty units: outputs high-energy pulses to ignition transformers and flame scanner power supplies during start-up, ensuring reliable light-off and flame confirmation.
Steam Turbine Ignition & Exciter Field
Firing pulses drive exciter field contactors and black-start diesel starter solenoids during island-mode black-start, maintaining generator voltage build-up when grid is unavailable.
Firing pulses drive exciter field contactors and black-start diesel starter solenoids during island-mode black-start, maintaining generator voltage build-up when grid is unavailable.
Remote Site & Island Mode Operation
Local firing pulses remain active during grid loss and battery-only operation, providing critical ignition energy when remote SCADA is offline .
Local firing pulses remain active during grid loss and battery-only operation, providing critical ignition energy when remote SCADA is offline .
