Appendix B Connecting I/O Signals
© National Instruments Corporation B-7 NI PXI-7831R User Manual
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Figure B-3. Connector Pinouts When Using NSC68-262650 Cable

The NSC68-5050 cable is designed to connect the signals on the NIPXI-78 31R 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 PXI-7831R 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 8-, 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 PXI-7831R 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 PXI-7831R 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
2
4
6
8
10
12
14
16
18
20
22
24
26
1
3
5
7
9
11
13
15
17
19
21
23
25
AO0
AOGND0
AO1
AO2
AOGND2
AO3
AO4
AOGND4
AO5
AO6
AOGND6
AO7
NC
NC
NC
AOGND1
NC
NC
AOGND3
NC
NC
AOGND5
NC
NC
AOGND7
NC

AO 0–7 Connector

Pin Assignment
2
4
6
8
10
12
14
16
18
20
22
24
26
1
3
5
7
9
11
13
15
17
19
21
23
25
AI0+
AIGND0
AI1+
AI2+
AIGND2
AI3+
AI4+
AIGND4
AI5+
AI6+
AIGND6
AI7+
AISENSE
AI0–
AI1–
AIGND1
AI2–
AI3–
AOGND3
AI4–
AI5–
AOGND5
AI6–
AI7–
AOGND7
NC

AI 0–7 Connector

Pin Assignment
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
NC
NC
NC
NC
NC
NC
NC
NC
DIO15
DIO14
DIO13
DIO12
DIO11
DIO10
DIO9
DIO8
DIO7
DIO6
DIO5
DIO4
DIO3
DIO2
DIO1
DIO0
+5V
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND

DIO 0–15 Connector

Pin Assignment