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Voltage Specification for RS-232, RS-422 and RS-485 Ports on NI cRIO 906x

Updated Mar 21, 2024

Reported In

Hardware

  • cRIO-9063
  • cRIO-9064
  • cRIO-9065
  • cRIO-9066
  • cRIO-9067
  • cRIO-9068

Issue Details

What are the maximum and minimum voltage for RS-232, RS-422 and RS-485 ports on my NI cRIO 906x? I am unable to find it on my hardware's specification sheet.

Solution

RS-232, RS-422 and RS-485 ports on NI hardware complies to serial communication regulation. However, please take note that the voltage measure across a serial communication line will vary based on the load and cable length. Please refer to picture below.
 
Rs-232, Rs-422 and Rs-485 Port Specification

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