Disable internal pullups on FIO pin | LabJack
 

Disable internal pullups on FIO pin

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Richard Goldberg
r.goldberg's picture
Disable internal pullups on FIO pin

Is there a way to disable the internal pullups on one of the FIO pins? I want a high impedance input with no pullups.

LabJack Support
LabJack Support's picture
There is no way to disable

There is no way to disable the pull-up resistors. There should be a way to interface properly with your output; what sort of output do you need to connect to the FIO?

One way to work with an "open" output state such as with a PNP output would be to use a pull-down resistor to overpower the internal pull-up:

https://labjack.com/support/app-notes/open-collector-signals