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Appendix B
Connecting I/O Signals
©
National Instruments Corporation
B-5
Connecting to SSR Signal Conditioning
NI provides cables that allow you to connect signals from the NI 781
x
R
directly to SSR backplanes for digital signal conditioning.
The NSC68-5050 cable is designed to connect the signals on the NI 781
x
R
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 NI 781
x
R 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 781
x
R 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 NI 781
x
R 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.