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GE DS3815PLNI
Overview: The DS3815PLNI is a high-reliability 125 VDC input power supply board from GE’s DS3815 family, built for Mark IV / IS200 turbine control system backplanes. The “N/I” suffix denotes premium industrial-grade component screening (the highest grade of industrial screening GE applied to this family). Supplier catalogs also list this part number under the DS3800 series as a 16-channel 24 VDC digital input module — source documents vary on the exact configuration, so the 125 VDC PSU identity is presented here based on the most detailed technical documentation.
Detailed content
Technical Specifications (125 VDC PSU configuration):
- Manufacturer: General Electric
- Model: DS3815PLNI
- Input Voltage: 125 VDC
- Total Power Output: 250 W
- Hold-up Time: 30 ms (vs. 20 ms for standard variants)
- Output Ripple: < 15 mV (vs. < 20 mV for standard variants)
- Component Screening: 100% temperature cycle testing (−40 °C to +125 °C, 100 cycles minimum) on all semiconductors; precision resistors ±0.5% with low temperature drift
- Coating: MIL-spec coating
- Temperature Rating: Extended temperature rating for harsh industrial environments
- Redundancy: Supports active current sharing for N+1 redundant configuration
- Status Indicators: DC OK (green), Overload (yellow), Overtemperature (red) LEDs
- Derating: At 75 °C ambient, capacity de-rates to ~187 W (about 25% loss)
Key Features:
- Premium N/I industrial components for maximum reliability in harsh environments
- Tighter voltage regulation and lower ripple than standard variants
- Enhanced filtering with MIL-spec conformal coating
- Expected service life of 7–10 years continuous operation in harsh industrial environments (offshore, high temperature, vibration)
- Proprietary backplane connector and output ramp timing — not replaceable by standard DIN-rail supplies
Application Scenarios: Critical industrial turbine applications where maximum performance and reliability are essential — power generation, offshore platforms, high-temperature and high-vibration environments. Suitable for powering fully populated Mark VI 15-slot racks (within thermal limits).
