Description
DS3800HSDD1F1G Product Overview
The DS3800HSDD1F1G is a high-speed data and solenoid-driver board used inside GE Mark IV turbine and EX2000 exciter control racks. It occupies a 6BA Euro-card slot and acts as the power interface between the 5 V CPU and 24 Vdc field loads: it buffers high-speed data lines, converts logic-level commands into isolated 24 Vdc outputs, and drives solenoid valves, brake coils and auxiliary contactors under sequence control. Because all copper traces are fully encapsulated in high-temperature epoxy, the board is treated as a line-replaceable module—any internal fault requires a complete card swap rather than component-level rework. The module is fully hot-swappable when the rack is powered down, and its 1.0 lb weight allows adjacent-slot population without additional support brackets.
The DS3800HSDD1F1G is a high-speed data and solenoid-driver board used inside GE Mark IV turbine and EX2000 exciter control racks. It occupies a 6BA Euro-card slot and acts as the power interface between the 5 V CPU and 24 Vdc field loads: it buffers high-speed data lines, converts logic-level commands into isolated 24 Vdc outputs, and drives solenoid valves, brake coils and auxiliary contactors under sequence control. Because all copper traces are fully encapsulated in high-temperature epoxy, the board is treated as a line-replaceable module—any internal fault requires a complete card swap rather than component-level rework. The module is fully hot-swappable when the rack is powered down, and its 1.0 lb weight allows adjacent-slot population without additional support brackets.
GE DS3800HSDD1F1G
DS3800HSDD1F1G Technical Specifications
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Model Number: DS3800HSDD1F1G
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Manufacturer: General Electric
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Product Type: High-Speed Data / Solenoid Driver Board
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Series: DS3800, Mark IV Speedtronic
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Form Factor: 6BA Euro-card (≈ 233 × 160 mm)
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Daughter-Card Mate: DS3800DSWA1A1A (terminal & surge block)
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Back-Plane Connector: Dual 40-pin header (J1/J2)
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Output Type: Isolated 24 Vdc solenoid driver, 2 A per channel (current-limited)
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Update Rate: 2 ms (synchronized to CPU scan)
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Isolation: 1500 Vdc channel-to-ground; opto-coupled status lines
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Power Demand: +5 V @ 0.8 A, +24 V @ 2 A (field) from rack 2PL bus
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Operating Temperature: 0 – 60 °C
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Weight: ≈ 1.0 lb (≈ 0.45 kg)
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Construction: Epoxy-sealed copper traces—non-repairable
Core Features & Customer Value
High-Speed Solenoid Drive: Each channel can sink 2 A at 24 Vdc with <1 ms turn-on delay. For the turbine operator this means fuel-trip solenoids and brake coils actuate immediately when the sequence demands, preventing overspeed or mechanical coasting that would otherwise extend start-up time.
Epoxy-Sealed Construction: All internal copper is encapsulated in high-temperature epoxy. In environments with high humidity, dust, or conductive contamination the seal prevents trace-to-trace shorting that would otherwise cause random “SOLENOID DRIVER FAIL” alarms after ten-plus years of service. The trade-off is non-repairability—any internal fault requires a whole-card exchange—but this is offset by reduced troubleshooting time and the fact that plants stock one spare instead of maintaining a repair bench.
Plug-and-Play Daughter-Card Interface: The board is normally sold together with terminal block DS3800DSWA1A1A, providing screw-clamp landing for field wires and on-board MOVs for surge suppression. For maintenance crews this translates to a three-minute replacement instead of a half-shift re-wiring job.
GE DS3800HSDD1F1G
Typical Applications
In combined-cycle power plants the board is installed in the Mark IV turbine control core where it drives the main fuel-trip solenoid, the auxiliary lube-oil pump contactor, and the hydraulic brake coil. The on-board opto-isolators keep 480 V switching transients from walking into the 5 V CPU data bus.
On utility-scale EX2000 static exciters the same card is used to energize the field-discharge contactor and the cooling-fan starter. Because the outputs are group-isolated, a shorted solenoid coil will not drag down the entire digital I/O rack.
Frequently the same part number is used on mechanical-drive gas compressors to drive the inlet-guide-vane hydraulic actuator and the fail-safe brake. Its ability to mix high-speed data buffering with isolated 24 V outputs on one card makes it a universal “solenoid driver” for any Mark IV loop that needs deterministic, contactor-level control.
