The BNC connector blocks that NI provides all have internal circuitry that is not compatible with R Series Multifunction RIO devices.
If you would like to manually create a BNC connector, you can use the SCB-68 and the CA-1000 to configure a custom, per-channel BNC connector solution. Alternatively, if you would like to create your own BNC connector block, NI offers 68-pin VHDCI connectors for use in custom applications.SMB (SubMiniature version B)
The SCB-68 HSDIO features pads next to each screw terminal onto which SMB connectors can be soldered. These SMB connectors will have to be purchased from a third-party provider. Information on recommended connectors (manufacturer and part number) are listed on page 6 of the NI SCB-68 HSDIO Connection Guide and Specifications
The NI SMB-2163 Single-Ended Digital I/O Accessory can also be used if soldering SMB connectors to the SCB-68 HSDIO is not practical. The DIO channels (0-31) are grounded, making these channels functional, even though the pinouts between SMB-2163 and R Series 78xx device may not match exactly.
The pinouts should still be compared to understand the caveats that may apply when using SMB-2163 with 78xx card. For example, SMB-2163 will work with PXIe-7820R with the following caveats:
1. PFI lines on the front of SMB-2163 will not have a useful function.
2. DDC CLK OUT on front of SMB-2163 will not be a DDC clock, it is connected to a GND pin on 7820R.
3. External Clock x (pin 67 on 7820R) is labeled on the SMB-2163 as STROBE.
This was determined by comparing the pinouts (SHC68-C68 type cable) of both devices, which are pictured below. The DIO channels match pins exactly so can be used as labeled on the SMB-2163. The caveats listed above are determined from the other, unmatched pins.