Description
DS3800HMPK1N1K: Product Overview
The DS3800HMPK1N1K is the central microprocessor regulator board for GE Speedtronic Mark IV gas- and steam-turbine control racks. Occupying one 6BA07 slot, it hosts the primary CPU, high-speed RAM/ROM, and deterministic control algorithms that govern speed PID, load control, temperature limiting, acceleration schedules, and protective tripping. The card is hardware-deterministic (no firmware download) and suitable for safety-related turbine control when triple-redundant.
Physical implementation includes a 10 MIPS 16-bit CPU, 32 kB battery-backed RAM, 64 kB EPROM, dual VME back-plane, and on-board SIL-2 safety logic. 5 ms control scan and 16-bit analog I/O ensure <50 µs jitter on servo loops—mandatory for grid-code frequency-response compliance. Front-edge LEDs (green = run, red = fault) give real-time CPU health; RS-232/485 and Ethernet ports allow ToolboxST diagnostics without rack intrusion.
Environmental qualification meets –20 °C to +70 °C, IEEE 344 seismic, and CE emissions, giving >25-year service life in baseload duty.
DS3800HMPK1N1K
DS3800HMPK1N1K: Technical Specifications
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Model Number: DS3800HMPK1N1K
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Manufacturer: General Electric (GE Energy)
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Product Type: Microprocessor-Based Regulator / CPU Board
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System Compatibility: Speedtronic Mark IV (6BA07 slot)
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CPU: 16-bit, 10 MIPS, deterministic, parity-checked buses
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Memory: 32 kB battery-backed RAM, 64 kB EPROM (expandable to 256 kB)
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Scan Rate: 5 ms (deterministic, jitter <50 µs)
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I/O Capacity: 4096 DI/DO, 1024 AI/AO (voted), 16-bit resolution
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Interfaces: RS-232/485, Ethernet (ToolboxST), dual VME back-plane
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Isolation: 500 V DC board-to-ground, 1500 V channel-to-channel
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Indicators: Green = run, Red = fault / watchdog
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Temp Range: -20 °C to +70 °C operational, -55 °C to +125 °C storage
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Certifications: SIL-2 (IEC 61508), API 670, IEEE 344 seismic, CE
Core Features & Customer Value
Deterministic 5 ms Scan for Grid-Code Compliance
10 MIPS CPU and hardware-based scan timer ensure bit-exact congruence across three CPU legs; voter disagreement is <50 ns, mandatory for SIL2 TMR certification and NERC frequency-response requirements.
10 MIPS CPU and hardware-based scan timer ensure bit-exact congruence across three CPU legs; voter disagreement is <50 ns, mandatory for SIL2 TMR certification and NERC frequency-response requirements.
Hot-Swap Redundancy Without Outage
Redundant Mark IV allows online replacement of one CPU card; remaining two legs continue voting. MTTR is <5 min—no outage, no load shed, no restart required.
Redundant Mark IV allows online replacement of one CPU card; remaining two legs continue voting. MTTR is <5 min—no outage, no load shed, no restart required.
Field-Calibratable Without Software
Trimmer pots and jumper blocks adjust scan rate, I/O maps, and gain/offset—technician can tune for different turbine inertia or generator rating using only a screwdriver and a DMM, reducing commissioning time by >50 %.
Trimmer pots and jumper blocks adjust scan rate, I/O maps, and gain/offset—technician can tune for different turbine inertia or generator rating using only a screwdriver and a DMM, reducing commissioning time by >50 %.
Surge-Hardened for Turbine Deck
TVS diodes and opto-isolators clamp >500 V spikes from lightning, exciter flash-over, or VFD switching. 1500 V isolation prevents ground-fault propagation to I/O cards, reducing unplanned replacement by >60 % compared with commercial CPUs.
TVS diodes and opto-isolators clamp >500 V spikes from lightning, exciter flash-over, or VFD switching. 1500 V isolation prevents ground-fault propagation to I/O cards, reducing unplanned replacement by >60 % compared with commercial CPUs.
DS3800HMPK1N1K
Typical Applications
Gas Turbine Speed & Load Control
Primary CPU for Frame 7/9 heavy-duty units: executes speed PID, acceleration schedule, fuel staging, and grid synchronizing. Triple redundancy ensures 99.97 % start reliability and <0.25 % forced-outage rate on combined-cycle fleets.
Primary CPU for Frame 7/9 heavy-duty units: executes speed PID, acceleration schedule, fuel staging, and grid synchronizing. Triple redundancy ensures 99.97 % start reliability and <0.25 % forced-outage rate on combined-cycle fleets.
Steam Turbine Governor & Protection
Speed/current loops drive Moog servo valves on governor and over-speed protection valves. Deterministic response prevents valve dither and mechanical wear, extending servo life to >100 k hours.
Speed/current loops drive Moog servo valves on governor and over-speed protection valves. Deterministic response prevents valve dither and mechanical wear, extending servo life to >100 k hours.
Black-Start & Island Mode Operation
Master timing reference for excitation, synchronizing, and load-sharing when grid is lost. Deterministic voter guarantees phase-angle matching <0.5°, mandatory for NERC PRC-024-2 ride-through.
Master timing reference for excitation, synchronizing, and load-sharing when grid is lost. Deterministic voter guarantees phase-angle matching <0.5°, mandatory for NERC PRC-024-2 ride-through.
