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GE DS3800HRIA1A1A
Product Name: GE DS3800HRIA1A1A Mark IV Analog I/O Isolator Board
Product Introduction: The GE DS3800HRIA1A1A is an analog I/O isolator board in the DS3800 series for GE Mark IV Speedtronic turbine and EX2000 exciter control racks. It serves as the analog “front end” between field transducers and the 5 V CPU, accepting ±10 V or 4–20 mA signals, providing 1500 V DC group isolation, buffering the result to the NDIA data bus, and clamping incoming surges with on-board MOVs.
Detailed content
Technical Specifications:
- Manufacturer: GE (GE Fanuc)
- Model: DS3800HRIA1A1A
- Product type: Analog I/O isolator / signal buffer board
- Series: DS3800, Mark IV Speedtronic
- Form factor: 6BA02 Euro-card (≈ 233 × 160 mm)
- Input range: ±10 V or 4–20 mA (jumper-selectable)
- Isolation: 1500 V DC channel-to-ground
- Update rate: 2 ms scan interval
- Power demand: +5 V @ 0.6 A, ±15 V @ 0.2 A (from rack PSU)
- Operating temperature: 0 °C to 60 °C
- Construction: Epoxy-sealed, non-repairable board
- Daughter-card mate: DS3800DSWA terminal block (screw-clamp landing)
- Weight: approximately 0.22 kg
Functional Features:
- Group-isolated analog front end
- Signal buffering between field transducers and CPU
- Surge clamping with on-board MOVs
- Elimination of ground-loop noise
- Epoxy-sealed construction for environmental protection
Material Composition:
- Fully encapsulated in high-temperature epoxy (all copper traces)
- 6BA02 Euro-card form factor
- Line-replaceable module construction
Structural Features:
- 6BA02 Euro-card slot form factor
- Epoxy-sealed non-repairable construction
- Typically paired with DS3800DSWA terminal block
- Low-profile epoxy package allows adjacent-slot population without additional cooling
Application Scenarios: GE Mark IV Speedtronic gas and steam turbine control racks, GE EX2000 exciter control racks — used wherever clean signal isolation is required between field analog signals and the 5 V CPU.
Working Principle: The board sits between field transducers and the CPU. It accepts ±10 V or 4–20 mA analog signals, provides 1500 V DC group isolation to eliminate ground loops, buffers the conditioned signal onto the NDIA data bus, and clamps incoming surges using on-board metal oxide varistors (MOVs). The result is clean, isolated analog data delivered to the Mark IV CPU with a 2 ms scan interval.
Installation Requirements:
- Install in the Mark IV rack with DS3800DSWA terminal block mated to the daughter-card connector
- Verify rack power supply (+5 V, ±15 V) before replacing the board
- Power down the rack and isolate power — do NOT hot-swap
- Verify full part number, terminal block match, rack compatibility, and signal range before installation
