Description
DS3800HAIC1A1A: Product Overview
The DS3800HAIC1A1A is a daughterboard-grade analog input card that plugs onto a motherboard carrier inside the Mark IV rack. It samples ±10 V, 0–10 V, 0–5 V, or 4–20 mA signals from temperature transmitters, pressure transducers, position sensors, and remote DCS loops, conditions them (amplification, filtering, isolation), and streams 12-bit digital data to the CPU over the VME back-plane. The card is hardware-configured (no firmware) and deterministic, making it suitable for safety-related process monitoring when triple-redundant.
Physical implementation includes 12-bit successive-approximation ADCs, op-amp signal conditioners, galvanic isolation, and TVS surge suppressors. Nine gold-pinned jumpers select input range, filter corner, and channel enable; two front-access trim pots allow offset and gain calibration without removing the board. 20-pin ribbon carries analog inputs and digital outputs; keyed and gold-plated to prevent mis-insertion or fretting corrosion under decades of thermal cycling.
Environmental qualification meets –40 °C to +85 °C, IEEE 344 form-factor, and CE emissions, giving >25-year service life in baseload duty.
DS3800HRMD1C1B
DS3800HAIC1A1A: Technical Specifications
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Model Number: DS3800HAIC1A1A
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Manufacturer: General Electric (GE Energy)
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Product Type: Analog Input / ADC Board
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System Compatibility: Speedtronic Mark IV (6BA09 slot)
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Input Range: ±10 V, 0–10 V, 0–5 V, 4–20 mA (jumper-selectable per channel)
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ADC Resolution: 12-bit monotonic, ±½ LSB INL
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Sampling Rate: 100 kHz max (jumper-selectable 1 kHz, 10 kHz, 100 kHz)
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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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Trimmers: Offset and gain pots per channel (front-access)
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Connectors: 20-pin ribbon, keyed, gold-plated
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Power Rails: +5 V logic, ±15 V analog, <1 W per channel
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LEDs: Green = channel active, Red = over-range / fault
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Temp Range: -40 °C to +85 °C operational, -55 °C to +125 °C storage
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Certifications: CE, RoHS, Mark IV form-factor compatible
Core Features & Customer Value
Microsecond-Fast Sampling for Closed-Loop Control
100 kHz per-channel rate and <5 µs settling enable 10 kHz servo-loop bandwidth—critical for IGV positioners, fuel-metering valves, and steam-governor actuators that must track speed/load transients without overshoot.
100 kHz per-channel rate and <5 µs settling enable 10 kHz servo-loop bandwidth—critical for IGV positioners, fuel-metering valves, and steam-governor actuators that must track speed/load transients without overshoot.
Hot-Swappable in TMR Strings
Redundant Mark IV allows online replacement of one ADC 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 ADC card; remaining two legs continue voting. MTTR is <5 min—no outage, no load shed, no restart required.
Field-Calibrated Without Software
Offset and gain trimmers compensate for sensor drift, cable resistance, or amplifier offset—technician can trim full-scale and zero using only a screwdriver and a DMM, reducing commissioning time by >50 %.
Offset and gain trimmers compensate for sensor drift, cable resistance, or amplifier offset—technician can trim full-scale and zero 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, VFD switching, or exciter flash-over. 1500 V isolation prevents ground-fault propagation to CPU cards, reducing unplanned replacement by >60 % compared with non-isolated ADC cards.
TVS diodes and opto-isolators clamp >500 V spikes from lightning, VFD switching, or exciter flash-over. 1500 V isolation prevents ground-fault propagation to CPU cards, reducing unplanned replacement by >60 % compared with non-isolated ADC cards.
DS3800HRMD1C1B
Typical Applications
Gas Turbine Fuel & IGV Control
Drives ±10 V input to Woodward servo amplifiers for fuel-metering valves and IGV hydraulic actuators in Frame 7/9 units. 12-bit resolution achieves 0.025 % fuel-flow accuracy, essential for NOx compliance and part-load heat-rate optimization .
Drives ±10 V input to Woodward servo amplifiers for fuel-metering valves and IGV hydraulic actuators in Frame 7/9 units. 12-bit resolution achieves 0.025 % fuel-flow accuracy, essential for NOx compliance and part-load heat-rate optimization .
Steam Turbine Governor & Extraction Control
4–20 mA output drives Moog servo valves on governor and extraction pressure loops. Deterministic update rate prevents valve dither and mechanical wear, extending servo life to >100 k hours.
4–20 mA output drives Moog servo valves on governor and extraction pressure loops. Deterministic update rate prevents valve dither and mechanical wear, extending servo life to >100 k hours.
Remote Indication & DCS Interface
0–10 V scaled signals feed plant DCS for remote load meters, temperature indicators, and vibration displays. Isolation eliminates ground-loop noise that would corrupt 4–20 mA loops in large combined-cycle sites.
0–10 V scaled signals feed plant DCS for remote load meters, temperature indicators, and vibration displays. Isolation eliminates ground-loop noise that would corrupt 4–20 mA loops in large combined-cycle sites.
