Keysight (Agilent) N8731A DC Power Supply

The Keysight N8731A is a 3200 W single-output DC power supply delivering 8 V at 400 A, engineered for automated testing, research and development, and manufacturing process control. Its compact 2U rack-mountable form factor integrates into diverse test environments with front-to-back airflow and standard rack mount ears. Universal AC input (85–265 Vac) with optional three-phase configurations ensures flexible deployment, while USB, LAN (LXI-Core), and GPIB interfaces support remote operation via built-in web server. Programming accuracy of 0.05% + 4 mV (voltage) and 0.1% + 800 mA (current) with 60 mV p-p output ripple meets demanding metrology requirements.

– Technical Specifications

DC Output
• Voltage: 8 V
• Current: 400 A
• Power: 3200 W

Accuracy
• Voltage: 0.05% + 4 mV
• Current: 0.1% + 800 mA

Output Ripple and Noise
• CV p-p: 60 mV
• CV rms: 8 mV

AC Input
• Universal: 85–265 Vac
• Optional: 208 V 3-phase, 400 V 3-phase, or 230 V single-phase
• AC input configuration is factory-installed and not field-changeable

Interfaces
• USB, LAN (LXI-Core), GPIB
• LXI Class C compliant
• Web-based remote control and monitoring

– Key Features

• Analog programming via 0–5 V / 0–10 V or 0–5 kΩ / 0–10 kΩ inputs
• Integrated voltage and current measurement
• Front panel voltage and current adjustment knobs with optional lock function
• Overcurrent, overvoltage, undervoltage, and overtemperature protection
• Parallel connection: up to four units for increased output current
• Series connection: two units for higher output voltage
• Busbars for low-voltage connections; wire clamp connectors for higher-voltage models
• Optional slide kit for flexible rack mounting

– Typical Applications

Automated test systems, R&D benches, and manufacturing quality assurance requiring stable, precisely controlled DC power with remote programmability and comprehensive fault detection.

– Compatibility & Integration

LXI-Core compliance and multi-protocol I/O (USB, LAN, GPIB) enable straightforward integration into existing ATE and laboratory automation frameworks. Built-in web server permits browser-based control independent of dedicated drivers or software installations.