Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 85–165 VDC); 24 VDC compatible with external adapter |
| Battery Backup | Integrated battery charger (for external 12V/24V battery); automatic transfer to battery on input loss (< 5ms) |
| Output Rails | +5 VDC / 10A (precision logic), ±15 VDC / 2.5A (each rail, precision analog) |
| Isolation | Full isolation (1.5kV input‑to‑output, 2.0kV output‑to‑ground) |
| Protection | Overcurrent protection (adjustable per output via jumpers), short‑circuit protection, transient suppression (6kV surge), reverse polarity protection, input undervoltage lockout, battery reverse protection |
| Regulation | Load regulation: ±0.02%; Line regulation: ±0.01%; Temperature coefficient: < 25 ppm/°C |
| Ripple | < 3mVpp (+5V), < 2mVpp (±15V) |
| Temperature Compensation | Active dual‑zone temperature compensation with heatsink‑mounted sensor for improved thermal tracking |
| Battery Features | Automatic transfer (< 5ms), battery status monitoring (voltage, current, temperature), battery health indication, charger status, programmable charge current, battery capacity estimation |
| Diagnostic Features | Onboard diagnostic engine for power supply and battery health monitoring; predictive failure indicators (capacitor ESR, MOSFET health); event logging (5,000‑event buffer) |
| Monitoring | 8 analog feedback channels (voltage and current monitoring for outputs + battery voltage, current, and temperature + input monitoring); 6 digital fault outputs (relay, 24V/1.5A) for system faults, battery status, and diagnostic alerts |
| Digital Interface | 6 digital inputs for battery test and external control; 8 digital outputs for status indication |
| Operating Temperature | –40°C to +70°C |
| Form Factor | 6U × 6HP (30mm) – requires 1.5 slots |
| Backplane Connector | Standard VME 96‑pin P1 + reinforced 60‑pin P2 (for battery connection) |
| Status LEDs | 10 indicators: INPUT OK (green), OUTPUT OK (green), BATTERY OK (green), BATTERY CHARGING (amber), BATTERY ACTIVE (blue), FAULT (red), OVERTEMP (yellow), PREDICTIVE ALERT (purple), BATTERY LOW (red flash), BATTERY TEST (white) |
| Certifications | CE, UL 508, CSA Class I Div 2, IEC 61508 SIL 2 (TÜV‑certified) |
| Efficiency | ~84% at full load |
Critical note: The DS3800NTBH is a temperature‑compensated power board with battery backup and advanced diagnostics offering high capacity, ultra‑low temperature drift (< 25 ppm/°C), and SIL 2 certification. It is physically wider (6HP) than standard 4HP boards and requires 1.5 adjacent slots. Hot‑swapping is not supported.
Key Features & Advantages
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Highest Capacity in NTB Family – +5V at 10A and ±15V at 2.5A.
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Ultra‑Low Temperature Drift – < 25 ppm/°C with dual‑zone compensation.
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Advanced Battery Management – Programmable charge current, battery temperature monitoring, and capacity estimation.
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Automatic Transfer – < 5ms transfer on input loss.
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Predictive Analytics – Monitors capacitor ESR and MOSFET health; purple LED warns before failure.
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Event Logging – 5,000‑event buffer for failure analysis.
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Comprehensive Monitoring – Eight analog channels for outputs, battery, and input status.
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Six Fault Relays – Separate fault indication for system faults, battery status, and diagnostic alerts.
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SIL 2 Certification – TÜV‑certified for functional safety.
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Wide Temperature Range – –40°C to +70°C.
Typical Application Cases
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Critical Instrumentation Cabinets – Powers precision instruments requiring power continuity, temperature stability, and diagnostics.
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Calibration Laboratories – Supplies power to calibration equipment with battery backup and diagnostic monitoring.
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High‑Precision Measurement Systems – Powers vibration analysis and other critical measurement systems.
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Safety‑Related Systems – SIL 2 certification makes it suitable for safety‑critical applications.
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Remote Locations – Provides power continuity during temporary input loss.
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Upgrade from Lower NTB Revisions – Offers the ultimate performance upgrade without changing rack configuration.
Competitive Comparison
| Aspect | DS3800NTBH (GE) | DS3800NTBG1A1A (GE) | DS3800NTBD1C1D (GE) |
|---|---|---|---|
| +5V Output | 10A | 6A | 8A |
| ±15V Output | 2.5A each | 1.5A each | 2A each |
| Temperature Coefficient | < 25 ppm/°C | < 50 ppm/°C | < 30 ppm/°C |
| Monitoring Channels | 8 | 4 | 6 |
| Fault Relays | 6 | 2 | 4 |
| Predictive Analytics | Yes | No | No |
| SIL 2 | Yes | No | No |
| Price (refurb) | ~$6,500–$9,500 | ~$4,200–$6,000 | ~$5,000–$7,500 |
The DS3800NTBH offers the highest capacity, ultra‑low temperature drift, and comprehensive monitoring for critical instrumentation applications.
Selection Guidelines & Precautions
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Application Verification – Designed for precision instrumentation with battery backup, diagnostics, and SIL 2.
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Physical Compatibility – 6HP wide, requires 1.5 adjacent slots.
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Backplane Compatibility – Uses P1 and P2 for battery connection. If backplane lacks P2, battery features unavailable.
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Battery Connection – Connect external battery to P2 connector. Use proper gauge wiring and fusing (10A slow‑blow recommended).
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Charge Current Programming – Configure charge current via onboard jumper (JP1) based on battery capacity.
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Temperature Compensation – Requires 30‑minute warm‑up to achieve specified temperature coefficient.
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Thermal Derating – Full output to 60°C; derate to 90% at 60–65°C, 80% at 65–70°C. Do not operate above 70°C.
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SIL 2 Compliance – Follow GE safety manual GEI‑101055 for installation and proof‑test intervals.
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Spare Sourcing – Production ended in 2021. Request test report verifying outputs, battery transfer, diagnostic functions, predictive analytics, and temperature stability. Inspect for capacitor bulging or discoloration. Prioritize this for the most demanding precision instrumentation applications requiring maximum capacity and ultra‑low temperature drift.
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