I am working quite a while with an analog output module NI-6733 and I didn't have any problems so far. Now I'd like to power en external circuitry with the +5V on pin 8 or 14. According to the datasheet the +5V power source is able to drive up to 1A . The circuit isn't to complex, just an opamp as a voltage follower. When the circuit is connected the voltage breaks down to roughly 2 volts. I also checked the behavior with a resistive load of 15k which should draw a maximum of 330µA. In that case the voltage decreases even further down to approx. 200mV. Another test with NI-6358 in the same chassis showed a proper behavior. Do you have any idea what could be the reason for that?
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Don't know where you read that you can drive up to 1A; from the specs I get the following:
Those voltage outputs are good for a reference only not to provide power to circuits.
What do you measure on Pin 8 and 14 with respect to any of the DGND?
If you don't measure 5V with no load, it is highly possible that something is damaged on your board.
Thanks for the reply. Indeed the fuse was broken. I had to replace it. It is easy to find on the board. Actually I supposed to find a poly switch but it was a simple fuse.