Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 90–160 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 / 8A (precision logic), ±15 VDC / 2A (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: ±0.03%; Line regulation: ±0.01%; Temperature coefficient: < 30 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 |
| Monitoring | 6 analog feedback channels (voltage and current monitoring for outputs + battery voltage, current, and temperature); 4 digital fault outputs (relay, 24V/1A) for system faults and battery status |
| Digital Interface | 2 digital inputs for battery test and external control; 4 digital outputs for status indication |
| Operating Temperature | –30°C to +65°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 | 8 indicators: INPUT OK (green), OUTPUT OK (green), BATTERY OK (green), BATTERY CHARGING (amber), BATTERY ACTIVE (blue), FAULT (red), OVERTEMP (yellow), BATTERY LOW (red flash) |
| Certifications | CE, UL 508, CSA Class I Div 2 |
| Efficiency | ~80% at full load |
Critical note: The DS3800NTBD1C1D is a temperature‑compensated power board with battery backup offering higher capacity, lower temperature drift, and advanced battery management compared to baseline NTBD. 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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Higher Capacity – +5V at 8A and ±15V at 2A—higher than baseline NTBD (6A, 1.5A).
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Lower Temperature Drift – < 30 ppm/°C (improved from < 50 ppm/°C).
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Advanced Battery Management – Programmable charge current, battery temperature monitoring, and low battery warning.
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Automatic Transfer – < 5ms transfer on input loss.
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Comprehensive Monitoring – Six analog channels for outputs and battery status.
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Four Fault Relays – Separate fault indication for system faults and battery status.
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Wide Temperature Range – –30°C to +65°C.
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CSA Div 2 Certification – Suitable for hazardous locations.
Typical Application Cases
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Critical Instrumentation Cabinets – Powers precision instruments requiring both power continuity and temperature stability.
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Calibration Laboratories – Supplies power to calibration equipment with battery backup.
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High‑Precision Measurement Systems – Powers vibration analysis and other critical measurement systems.
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Remote Locations – Provides power continuity during temporary input loss.
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Upgrade from Baseline NTBD – Offers significant performance upgrade without changing rack configuration.
Competitive Comparison
| Aspect | DS3800NTBD1C1D (GE) | DS3800NTBD (baseline) | DS3800NRTB (GE) |
|---|---|---|---|
| +5V Output | 8A | 6A | 8A |
| ±15V Output | 2A each | 1.5A each | 2A each |
| Temperature Coefficient | < 30 ppm/°C | < 50 ppm/°C | < 30 ppm/°C |
| Battery Backup | Yes (programmable) | Yes (fixed) | No |
| Battery Monitoring | V+I+T | V only | N/A |
| Transfer Time | < 5ms | < 10ms | N/A |
| Price (refurb) | ~$5,000–$7,500 | ~$4,000–$6,000 | ~$4,800–$6,800 |
The DS3800NTBD1C1D offers superior temperature stability, higher capacity, and advanced battery management for critical instrumentation applications.
Selection Guidelines & Precautions
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Application Verification – Designed for precision instrumentation with battery backup.
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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 (default: 1A).
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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 55°C; derate to 90% at 55–60°C, 80% at 60–65°C. Do not operate above 65°C.
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Spare Sourcing – Production ended in 2018. Request test report verifying outputs, battery transfer, and temperature stability. Inspect for capacitor bulging or discoloration.
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