Appendix B Connecting I/O Signals
© National Instruments Corporation B-5 NI 781xR User Manual
Connecting to SSR Signal Conditioning
NI provides cables that allow you to connect signals from the NI 781xR
directly to SSR backplanes for digital signal conditioning.
The NSC68-5050 cable is designed to connect the signals on the NI 781xR
DIO connectors directly to SSR backplanes for digital signal conditioning.
This cable has a 68-pin male VHDCI connector on one end that plugs into
the NI7 81xR DIO connectors. The other end of this cable provides two
50-pin female headers.
Each of these 50-pin headers can be plugged directly into an eight-, 16-,
24-, or 32-channel SSR backplane for digital signal conditioning. One of
the 50-pin headers contains DIO lines <0..23> from the NI 781xR DIO
connector. These lines are mapped to slots <0..23> on an SSR backplane in
sequential order. The other 50-pin header contains DIO lines <24..39> from
the NI7 81xR DIO connector. These lines are mapped to slots <0..15> on
an SSR backplane in sequential order. You can connect to an SSR
backplane containing a number channels that does not equal the number of
lines on the NSC68-5050 cable header. In this case, you have access only
to the channels that exist on both the SSR backplane and the NSC68-5050
cable header you are using.
Figure B-3 shows the connector pinouts when using the NSC68-5050
cable.