04-20-2021 06:25 AM
Hi,
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?
Thanks,
SeMathias14
Solved! Go to Solution.
04-23-2021 05:52 PM
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.
04-23-2021 05:56 PM
oops, my mistake, I was thinking you where refering to the Analog Outputs of the device.
04-23-2021 10:43 PM
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.
04-26-2021 01:09 PM - edited 04-26-2021 01:11 PM
Yeah right I was referring to the +5V power output. It can source up to 1A.
04-26-2021 01:13 PM
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.