Sometimes power supplies have USB and RS232 interfaces, what is the reason?


In this video of eev blog, david jones was doing a teardown of one which has rs232 and usb interfaces..

  • \$\begingroup\$ Can you give us a link to an example? \$\endgroup\$ – The Photon Oct 30 '16 at 15:47
  • \$\begingroup\$ @ThePhoton check the edit.. \$\endgroup\$ – iMohaned Oct 30 '16 at 15:56
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    \$\begingroup\$ Suppose you make a product and your datasheet says it works at 5 V +/- 10%. How would you imagine testing that capability? Suppose you have to test 100 (or 1000) units per hour? \$\endgroup\$ – The Photon Oct 30 '16 at 16:01

This would typically be to allow them to be remotely programmable from a PC, e.g. this TDK-Lambda Z+400 supply which provides USB, RS-232 and RS-485 interfaces.

Programmability is very useful in setting up automated testing. Sort of like having a DAC with a large current capability.

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