Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | 125 VDC nominal (range 100–150 VDC); 24 VDC compatible with external adapter |
| Output Rails | Main Output: 5–24 VDC / 5A (adjustable), +5 VDC / 2A (logic), ±15 VDC / 0.5A (each rail, 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 |
| Regulation | Load regulation: ±0.5%; Line regulation: ±0.2%; Ripple: < 30mVpp (main), < 20mVpp (±15V) |
| Adjustment Range | Main output adjustable 5–24 VDC via onboard potentiometer |
| Monitoring | 4 analog feedback channels (voltage and current monitoring for main output and +5V); 4 digital fault outputs (relay, 24V/0.5A) for system faults and diagnostic alerts |
| Diagnostic Features | Onboard diagnostic engine for power supply health monitoring; event logging (2,000‑event buffer) |
| Digital Interface | 4 digital inputs for external control; 6 digital outputs for status indication |
| Communication Interface | RS‑485/Modbus for external device communication; communicates with main CPU via backplane |
| 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 | 8 indicators: INPUT OK (green), OUTPUT OK (green), SYSTEM OK (green), FAULT (red), ADJUST ACTIVE (blue), AUX OK (green), DIAGNOSTIC ALERT (orange), COMM ACTIVE (white) |
| Certifications | CE, UL 508 (non‑hazardous locations only) |
| Efficiency | ~78% at full load |
Critical note: The DS3800NVCD is a variable voltage converter board with diagnostics and communication. 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 Main Output – 5–24 VDC adjustable via onboard potentiometer.
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Diagnostic Engine – Onboard diagnostics for power supply health monitoring.
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Event Logging – 2,000‑event buffer for failure analysis.
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Communication Interface – RS‑485/Modbus for external device communication.
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Full Isolation – 1.5kV isolation protects sensitive circuits.
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Multiple Outputs – Main output plus fixed +5V and ±15V rails.
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Four Fault Relays – Separate fault indication for system faults and diagnostic alerts.
Typical Application Cases
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Auxiliary Control Cabinets – Provides flexible voltage conversion with diagnostics.
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Test Equipment – Supplies adjustable voltage with health monitoring.
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Field Device Power Distribution – Powers devices with varying voltage requirements.
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System Integration Projects – Used when adjustable voltage and diagnostics are required.
Selection Guidelines & Precautions
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Application Verification – Designed for flexible voltage conversion with adjustable output 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. If backplane lacks P2, auxiliary features unavailable.
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Voltage Adjustment – Adjust main output via onboard potentiometer. Use precision voltmeter for calibration.
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Communication Configuration – Configure RS‑485/Modbus parameters via backplane communication using GE Service Tool Software.
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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, adjustment range, and diagnostic functions. Inspect for capacitor bulging or discoloration.
A-B 1756-TBCH
A-B 1756-TBCH
A-B 1756-N2
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