The LabJack has a nominal + 5 volt internal power supply. Power can be drawn from this power supply by connecting to the. 5V screw-terminals or the + +, 5V pins on the DB25 connector. The total amount of current that can be drawn from the + 5V, pins. Analog outputs and digital, outputs is 450, mA for most desktop computers and self-powered USB hubs. Some notebook computers. And bus-powered hubs will limit this available current to about 50 mA.The USB specification requires all hosts and hubs to have overcurrent protection. If the user puts too large a load on. + 5V (including a short circuit of + 5V to GND) of the LabJack U12 (a USB device), the host or hub is responsible for limiting. The current.
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