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USB-6251 Screw Terminal
USB-6251 Screw Terminal Pinout
Figure A-15 shows the pinout of the USB-6251 Screw Terminal.
AI 0 (AI 0+)
1
AI 8 (AI 0-)
2
AI GND
3
AI 1 (AI 1+)
4
AI 9 (AI 1-)
5
AI GND
6
AI 2 (AI 2+)
7
AI 10 (AI 2-)
8
AI GND
9
AI 3 (AI 3+)
10
AI 11 (AI 3-)
11
AI GND
12
AI SENSE
13
AI GND
14
AO 0
15
AO GND
16
Counter/Timer Signal
CTR 0 SRC
CTR 0 GATE
CTR 0 AUX
CTR 0 OUT
CTR 1 SRC
Figure A-15. USB-6251 Screw Terminal Pinout
17
AI 4 (AI 4+)
18
AI 12 (AI 4-)
19
AI GND
20
AI 5 (AI 5+)
21
AI 13 (AI 5-)
22
AI GND
23
AI 6 (AI 6+)
24
AI 14 (AI 6-)
25
AI GND
26
AI 7 (AI 7+)
27
AI 15 (AI 7-)
28
AI GND
29
APFI 0
30
AI GND
31
AO 1
32
AO GND
Table A-15. Default NI-DAQmx Counter/Timer Pins
CTR 0 A
CTR 0 Z
CTR 0 B
P0.0
65
P0.1
66
P0.2
67
P0.3
68
P0.4
69
P0.5
70
P0.6
71
P0.7
72
PFI 0/P1.0
73
PFI 1/P1.1
74
PFI 2/P1.2
75
PFI 3/P1.3
76
PFI 4/P1.4
77
PFI 5/P1.5
78
PFI 6/P1.6
79
PFI 7/P1.7
80
Default Pin Number (Name)
81 (PFI 8)
83 (PFI 9)
85 (PFI 10)
89 (PFI 12)
81 (PFI 8)
83 (PFI 9)
85 (PFI 10)
76 (PFI 3)
© National Instruments | A-31
M Series User Manual
81
PFI 8/P2.0
82
D GND
83
PFI 9/P2.1
84
D GND
85
PFI 10/P2.2
86
D GND
87
PFI 11/P2.3
88
D GND
89
PFI 12/P2.4
90
D GND
91
PFI 13/P2.5
92
D GND
93
PFI 14/P2.6
94
D GND
95
PFI 15/P2.7
96
+5 V
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