Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 100–150 VDC); 24 VDC compatible with external adapter |
| Battery Backup | Integrated battery charger (for external 12V/24V battery); automatic transfer to battery on input loss |
| Output Rails | +5 VDC / 5A (precision logic), ±15 VDC / 1A (each rail, precision analog) |
| Isolation | Full isolation (1.5kV input‑to‑output, 2.0kV output‑to‑ground) |
| Protection | Overcurrent protection (fixed), short‑circuit protection, transient suppression (4kV), reverse polarity protection, input undervoltage lockout, battery reverse protection |
| Regulation | Load regulation: ±0.05%; Line regulation: ±0.02%; Temperature coefficient: < 50 ppm/°C |
| Ripple | < 5mVpp (+5V), < 3mVpp (±15V) |
| Temperature Compensation | Active temperature compensation using precision reference ICs and thermistor‑based feedback networks |
| Battery Features | Automatic transfer (< 10ms), battery status monitoring, battery health indication, charger status |
| Diagnostic Features | Onboard diagnostic engine for power supply and battery health monitoring; event logging (1,000‑event buffer) |
| Monitoring | 4 analog feedback channels (voltage and current monitoring for outputs + battery status); 2 digital fault outputs (relay, 24V/0.5A) for system faults and battery status |
| Operating Temperature | –25°C to +60°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 | 6 indicators: INPUT OK (green), OUTPUT OK (green), BATTERY OK (green), BATTERY CHARGING (amber), BATTERY ACTIVE (blue), FAULT (red) |
| Certifications | CE, UL 508 (non‑hazardous locations only) |
| Efficiency | ~76% at full load |
Critical note: The DS3800NTBE1A1A is the baseline temperature‑compensated power board with battery backup and diagnostics. 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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Integrated Battery Backup – External battery connection with automatic transfer (< 10ms) on input loss.
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Precision Temperature Compensation – Maintains temperature coefficient of < 50 ppm/°C.
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Enhanced Diagnostics – Onboard diagnostic engine for power supply and battery health monitoring.
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Battery Health Monitoring – Monitors battery status and charger condition.
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Event Logging – 1,000‑event buffer for failure analysis.
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Exceptional Regulation – Load regulation of ±0.05% and line regulation of ±0.02%.
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Full Isolation – 1.5kV isolation protects sensitive circuits.
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Two Fault Relays – Separate fault indication for system faults and battery status.
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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Legacy Fleet Replacement – Baseline replacement for failed NTBE units in older Mark IV systems.
Competitive Comparison
| Aspect | DS3800NTBE1A1A (GE) | DS3800NTBE (later revision) | DS3800NTBD1C1D (GE) |
|---|---|---|---|
| +5V Output | 5A | 6A | 8A |
| ±15V Output | 1A each | 1.5A each | 2A each |
| Temperature Coefficient | < 50 ppm/°C | < 50 ppm/°C | < 30 ppm/°C |
| Diagnostic Engine | Yes | Yes | No |
| Price (refurb) | ~$3,800–$5,500 | ~$4,200–$6,000 | ~$5,000–$7,500 |
Selection Guidelines & Precautions
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Application Verification – Designed for precision instrumentation with battery backup and diagnostics.
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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.
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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 50°C; derate to 90% at 50–55°C, 80% at 55–60°C.
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Spare Sourcing – Production ended in 2005. Request test report verifying outputs, battery transfer, diagnostic functions, and temperature stability. Inspect for capacitor bulging or discoloration. Consider upgrading to later NTBE or NTBD revisions for higher capacity and improved features.
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