Description
DS3800DFEB1C1B: Product Overview
The DS3800DFEB1C1B is a daughterboard-grade analog input conditioner that plugs onto a motherboard carrier inside the GE Speedtronic Mark IV rack. It sits electrically between field sensors and the central CPU, converting low-level analog signals (mV to ±10 V) from RTDs, pressure transducers, and position sensors into conditioned voltage/current outputs that the CPU can use for speed control, temperature limiting, and protective tripping. Because it is hardware-deterministic (no firmware), the card delivers bit-exact timing across all three legs of a TMR string, making it suitable for SIL-2 / API 670 safety loops.
The board belongs to the DS3800 daughterboard architecture, allowing hot-swap replacement without rewiring the turbine deck. Gold-plated edge fingers, conformal coat, and –40 °C to +85 °C rating ensure 25-year service life in coal-dust, salt-fog, or high-vibration environments.
DS3800DMPK1E1D
DS3800DFEB1C1B: Technical Specifications
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Model Number: DS3800DFEB1C1B
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Manufacturer: General Electric (GE)
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Product Type: Analog Input / Signal Conditioning Board
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System Compatibility: Speedtronic Mark IV (6BA06 slot)
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Input Supply Voltage: 24 V DC (field-side)
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Input Signal Range: ±10 V, 0–10 V, 0–5 V, 4–20 mA (jumper-selectable)
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Isolation: 1500 V AC channel-to-ground, 500 V channel-to-channel
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Filter: 2-pole Butterworth, 10 Hz–10 kHz jumper-selectable
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Connectors: 20-pin ribbon (field side) + VME edge fingers (back-plane side)
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Power Consumption: <1 W per channel
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Operating Temperature: -40 °C to +85 °C
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Dimensions: 10 cm × 5 cm × 2 cm (approx.)
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Weight: <100 g
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Built-in Diagnostics: Channel health LEDs, over-range detection
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Certifications: CE, RoHS, IEEE 344 seismic qualified
Core Features & Customer Value
Hardware-Deterministic Timing
No firmware means every channel responds with bit-exact timing across all three TMR legs, eliminating scan-to-scan jitter that could introduce voter disagreement. You get SIL-2 / API 670 confidence for overspeed, over-temperature, or flame-detection loops without external safety relays.
No firmware means every channel responds with bit-exact timing across all three TMR legs, eliminating scan-to-scan jitter that could introduce voter disagreement. You get SIL-2 / API 670 confidence for overspeed, over-temperature, or flame-detection loops without external safety relays.
Hot-Swap Ready
Daughterboard form allows you to extract and insert the card while the turbine remains on-line (provided the carrier is in a TMR string). Mean-time-to-repair is <5 minutes, so you avoid forced outages and start-up delays.
Daughterboard form allows you to extract and insert the card while the turbine remains on-line (provided the carrier is in a TMR string). Mean-time-to-repair is <5 minutes, so you avoid forced outages and start-up delays.
Field-Calibratable Without Software
On-board trim pots let you adjust offset and gain on the turbine deck using only a screwdriver and a DMM. This eliminates the need for a laptop or OEM service call when you swap sensors, change cable runs, or recalibrate after a major overhaul.
On-board trim pots let you adjust offset and gain on the turbine deck using only a screwdriver and a DMM. This eliminates the need for a laptop or OEM service call when you swap sensors, change cable runs, or recalibrate after a major overhaul.
Surge-Hardened for Harsh Sites
TVS diodes on every input clamp >500 V spikes from lightning, VFD switching, or exciter flash-over. The 1500 V galvanic isolation barrier prevents ground-fault currents from propagating into the low-voltage CPU domain, extending card life beyond 25 years in coal-dust, salt-fog, or high-vibration environments.
TVS diodes on every input clamp >500 V spikes from lightning, VFD switching, or exciter flash-over. The 1500 V galvanic isolation barrier prevents ground-fault currents from propagating into the low-voltage CPU domain, extending card life beyond 25 years in coal-dust, salt-fog, or high-vibration environments.
DS3800DMPK1E1D
Typical Applications
Gas Turbine Bearing & Combustor Monitoring
In large combined-cycle plants, DS3800DFEB1C1B is widely used to condition bearing-metal RTDs and combustion-can pressure transmitters. The 24 V DC supply and –40 °C rating allow it to run directly on the turbine deck without HVAC, while the 10 cm × 5 cm footprint keeps the rack footprint small.
In large combined-cycle plants, DS3800DFEB1C1B is widely used to condition bearing-metal RTDs and combustion-can pressure transmitters. The 24 V DC supply and –40 °C rating allow it to run directly on the turbine deck without HVAC, while the 10 cm × 5 cm footprint keeps the rack footprint small.
Steam Turbine Governor & Extraction Control
The card’s 4–20 mA capability makes it the preferred interface for steam-valve position LVDTs and exhaust-pressure transmitters. During load ramps, the deterministic update rate prevents valve dither, extending servo life beyond 100 000 cycles while maintaining ±0.1 % pressure control accuracy.
The card’s 4–20 mA capability makes it the preferred interface for steam-valve position LVDTs and exhaust-pressure transmitters. During load ramps, the deterministic update rate prevents valve dither, extending servo life beyond 100 000 cycles while maintaining ±0.1 % pressure control accuracy.
Island-Mode & Black-Start Sites
On offshore platforms or remote peaking plants, the built-in diagnostics and 24 V DC supply allow the card to run from station batteries. Battery-backed operation is supported because the card draws <1 W and continues to deliver accurate readings when external transmitters are powered from station DC.
On offshore platforms or remote peaking plants, the built-in diagnostics and 24 V DC supply allow the card to run from station batteries. Battery-backed operation is supported because the card draws <1 W and continues to deliver accurate readings when external transmitters are powered from station DC.
