USB-201 & USB-204 5V power (+VO) output drive capability
The following information applies only to the USB-201 & USB-204 models:
The +VO pin can supply the user with +5V power, up to 100 mA. However, note that drawing too much current can cause damage. Be sure to prevent the direct connection of +VO to ground. If after doing so, the unit's LED no longer illuminates, then the unit has been damaged and it requires factory repair.