Digital guide
You are here:
GE DS3800NPSF
Product Name: GE DS3800NPSF Secondary / Auxiliary Power Supply Board
Product Overview: The DS3800NPSF functions as a secondary or auxiliary power supply board in the Mark IV Speedtronic rack. It mounts via edge connectors to the parallel backplane and distributes conditioned DC voltages to adjacent control and I/O cards, converting and regulating rack input power into stable outputs for logic and analog circuits.
Detailed content
Technical Specifications:
- Model Number: DS3800NPSF1C1B
- Brand: General Electric (GE)
- Type: Power Supply Board
- Input Voltage: 120 V AC / DC (typical Mark IV rack)
- Operating Temperature Range: -30 °C to +65 °C
- Mounting Style: Rack-mounted PCB with edge connectors
- Dimensions: Approximately 8.25 in × 4.18 in (standard DS3800 form factor)
- Weight: Approximately 0.8 lb
- Interface/Bus: Mark IV parallel backplane
- Compliance: UL, CSA (typical for era)
- Typical Power Draw: ~10–15 W
Functional Features:
- Incorporates filtering components to suppress ripple and transients common in turbine electrical environments
- Includes overcurrent protection, fuse points, and test points for verification
- Works alongside primary units like NPSY or NPSE variants, feeding the common bus that supports TMR voting among processor cards
- Supports both simplex and redundant configurations without external protocols
Application Scenarios: Legacy GE Speedtronic Mark IV turbine control systems in power generation; high-vibration environments such as gas or steam turbine halls.
Usage Notes: Aging power supplies often exhibit capacitor degradation or fuse issues, leading to unstable ±15 V, +5 V, or +24 V rails that affect processor voting, I/O accuracy, and overall system fault tolerance. Accessible fuses and test points enable quick diagnostics without rack disassembly.
