500 Watt
Analog programming of output voltage and current
Self-test initiated at power-up
Electronic calibration from front panel
Five nonvolatile store and recall states
User-defined power-on state
Fan-speed control to minimize acoustic noise
Auto-parallel of up to three 655xAs
Over-voltage and over-current protection
Over-temperature protection
https://www.keysight.com/us/en/support/6551A/500-watt-dc-system-power-supply-8v-50a.html
