Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 100–150 VDC); 24 VDC compatible with external adapter |
| Output Rails | +5 VDC / 5A (logic), ±15 VDC / 1A (each rail, adjustable ±10%), +24 VDC / 0.5A (auxiliary) |
| 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 |
| Regulation | Load regulation: ±0.5%; Line regulation: ±0.2%; Ripple: < 30mVpp (+5V), < 15mVpp (±15V) |
| Adjustment Range | ±15V rails adjustable ±10% (13.5V–16.5V) via onboard potentiometers |
| Monitoring | 2 analog feedback channels (voltage monitoring for +5V and +15V); 2 digital fault outputs (relay, 24V/0.5A) for system faults |
| Digital Interface | 2 digital inputs for external control; 4 digital outputs for status indication |
| 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 |
| Status LEDs | 6 indicators: INPUT OK (green), OUTPUT OK (green), SYSTEM OK (green), FAULT (red), AUX OK (green), ADJUST ACTIVE (blue) |
| Certifications | CE, UL 508 (non‑hazardous locations only) |
| Efficiency | ~78% at full load |
Critical note: The DS3800NVAA is a variable voltage analog power board with adjustable ±15V outputs. 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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Adjustable Analog Outputs – ±15V rails adjustable ±10% (13.5V–16.5V) via onboard potentiometers.
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Full Isolation – 1.5kV isolation protects sensitive analog circuits.
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Auxiliary +24V Output – 24V/0.5A for powering external devices.
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Two Fault Relays – Separate fault indication for system faults.
Typical Application Cases
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Instrumentation Cabinets – Powers precision analog circuits with adjustable voltage.
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Analog Signal Conditioning Racks – Provides adjustable power for signal conditioners.
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Calibration Equipment – Supplies adjustable analog power for calibration.
Selection Guidelines & Precautions
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Application Verification – Designed for analog power distribution with adjustable outputs.
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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, auxiliary features unavailable.
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Voltage Adjustment – Adjust ±15V rails via onboard potentiometers. Use precision voltmeter for calibration.
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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 2010. Request test report verifying outputs and adjustment range. Inspect for capacitor bulging or discoloration.
A-B 1756-TBCH
A-B 1756-TBCH
A-B 1756-N2
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