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ni 8431 output voltage

ni 8431 output voltage

‎08-12-2019 02:10 PM

hi,

I am using ni 8431 serial board for rs-485.

when i login windows there is a constant output voltage on TX+ line.

image.png

how can i disable the output voltage and activate it again after certain setup on my UUT ?

regards

gilad

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Re: ni 8431 output voltage

‎08-13-2019 09:25 AM

In the case of NI 843x RS-232 devices, the voltage output signal level is of +/-5.5 volt logic. Moreover, +5.5 volts represents a logic low and -5.5 volts represents a logic high. These output levels cannot be changed.  

 

See http://www.ni.com/product-documentation/54555/en/ for more info.

 

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