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Appendix B Connecting I/O Signals
© National Instruments Corporation B-5 NI 7831R User Manual
Connecting to 5B and SSR Signal Conditioning
NI provides cables that allow you to connect signals from the NI 7831R
directly to 5B backplanes for analog signal conditioning and SSR
backplanes for digital signal conditioning.
The NSC68-262650 cable connects the signals on the NI 7831R MIO
connector directly to 5B and SSR backplanes. This cable has a 68-pin male
VHDCI connector on one end that plugs into the NI 7831R MIO connector.
The other end of this cable provides two 26-pin female headers plus one
50-pin female header.
One of the 26-pin headers contains all the NI 7831R analog input signals.
You can plug this connector directly into a 5B backplane for analog input
signal conditioning. The NI 7831R AI<0..7> correspond to the 5B
backplane channels <0..7> in sequential order. Configure the AI channels
to use the NRSE input mode when using 5B signal conditioning.
The other 26-pin header contains all the NI 7831R analog output signals.
You can plug this connector directly into a 5B backplane for AO signal
conditioning. The NI 7831R AO<0..7> correspond to the 5B backplane
channels <0..7> in sequential order.
The 50-pin header contains the 16 DIO lines available on the NI 7831R
MIO connector. You can plug this header directly into an SSR backplane
for digital signal conditioning. DIO lines <0..15> correspond to the 5B
backplane Slots <0..15> in sequential order.
The 5B connector pinouts are compatible with eight-channel 5B08
backplanes and 16-channel 5B01 backplanes. Because the NI 7831R has
eight AI channels, you have access to the first eight channels in a
16-channel backplane. The SSR connector pinout is compatible with
eight-, 16-, 24-, and 32-channel SSR backplanes. You can connect to an
SSR backplane containing a number of channels unequal to the 16 DIO
lines available on the 50-pin header. In this case, you have access to only
the channels that exist on both the SSR backplane and the NSC68-262650
cable 50-pin header.
Figure B-3 shows the connector pinouts when using the NSC68-262650
cable.