Incorrect Readings From NI-6583

Updated Feb 27, 2020

Reported In

Hardware

  • NI-6583
  • CB-2162
  • SHC68-C68-D5

Software

  • Measurement & Automation Explorer (MAX)

Issue Details

I am using an NI-6583 FlexRIO Adapter Module along with an NI CB-2162 and SHC68-C68-D5 cable. While trying to acquire digital data, I observe multiple pins on the Terminal Block shorted to each other and hence showing erroneous data. Is this behavior expected?

Solution

You are observing wrong data on the setup as SHC68-C68-D5 cable is not the recommended accessory  for use with NI 6583. Using the SHC68-C68-D4 cable will help in getting the correct digital readings on the pins. 

Additional Information

The SHC68-C68-D5 cable is used to connect the NI PXI/PXIe-2515 switch module to a supported NI high-speed DIO device. According to the cable pinout, certain pins on both the connectors are internally shorted to serve as GND and will appear as unexpected shorting when used with CB-2162. 



Other recommended cables for use with NI-6583 are:
1. SHC68-H1X38 High-Speed Digital Flying-Leads Cable
2. C68-C68-D4 Unshielded Cable, 2X68-Position VHDCI