Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 90–160 VDC); 24 VDC compatible with external adapter |
| 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 |
| 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 |
| Analytics Features | Onboard system analytics engine for performance monitoring, trend analysis, and health scoring; event logging (5,000‑event buffer); system‑level diagnostics; communicates with main CPU via backplane |
| Monitoring | 6 analog feedback channels (voltage and current monitoring for outputs + input monitoring); 4 digital fault outputs (relay, 24V/1A) for system faults and analytics alerts |
| Digital Interface | 4 digital inputs for external control; 6 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 |
| Status LEDs | 8 indicators: INPUT OK (green), OUTPUT OK (green), SYSTEM OK (green), FAULT (red), ANALYTICS ACTIVE (blue), HEALTH ALERT (orange), OVERTEMP (yellow), PREDICTIVE ALERT (purple) |
| Certifications | CE, UL 508, CSA Class I Div 2, IEC 61508 SIL 2 (TÜV‑certified) |
| Efficiency | ~80% at full load |
Critical note: The DS3800NTSA1B1A is a temperature‑compensated power board with system analytics and SIL 2 certification, offering higher capacity and lower temperature drift than the baseline NTSA. 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 NTSA (6A, 1.5A).
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Lower Temperature Drift – < 30 ppm/°C with dual‑zone compensation (improved from < 50 ppm/°C).
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System Analytics Engine – Onboard analytics for performance monitoring, trend analysis, and health scoring.
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Event Logging – 5,000‑event buffer for performance data and failure analysis.
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Predictive Analytics – Monitors capacitor ESR and MOSFET health; purple LED warns before failure.
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Health Scoring – Provides health score for power supply condition assessment.
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Exceptional Regulation – Load regulation of ±0.03% and line regulation of ±0.01%.
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Full Isolation – 1.5kV isolation protects sensitive circuits.
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Four Fault Relays – Separate fault indication for system faults and analytics alerts.
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SIL 2 Certification – TÜV‑certified for functional safety.
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Wide Temperature Range – –30°C to +65°C.
Typical Application Cases
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Critical Instrumentation Cabinets – Powers precision instruments requiring temperature stability and system analytics.
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Calibration Laboratories – Supplies power to calibration equipment with health 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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Predictive Maintenance Programs – Enables condition‑based maintenance through health scoring.
Competitive Comparison
| Aspect | DS3800NTSA1B1A (GE) | DS3800NTSA (baseline) | DS3800NTEA1A1A (GE) |
|---|---|---|---|
| +5V Output | 8A | 6A | 5A |
| ±15V Output | 2A each | 1.5A each | 1A each |
| Temperature Coefficient | < 30 ppm/°C | < 50 ppm/°C | < 50 ppm/°C |
| Event Logging | 5,000 events | 2,000 events | 1,000 events |
| SIL 2 | Yes | No | No |
| Price (refurb) | ~$5,500–$8,000 | ~$4,200–$6,000 | ~$3,800–$5,500 |
Selection Guidelines & Precautions
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Application Verification – Designed for precision instrumentation with system analytics 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. If backplane lacks P2, analytics features unavailable.
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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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SIL 2 Compliance – Follow GE safety manual GEI‑101115 for installation and proof‑test intervals.
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Spare Sourcing – Production ended in 2021. Request test report verifying outputs, analytics functions, predictive analytics, and temperature stability. Inspect for capacitor bulging or discoloration. Prioritize this over baseline NTSA for applications requiring higher capacity and lower temperature drift.
A-B 1756-BA1
A-B 1756-TBCH
A-B 1756-TBNH
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