© National Instruments | A-7
M Series User Manual
USB-6221 Screw Terminal
USB-6221 Screw Terminal Pinout
Figure A-3 shows the pinout of the USB-6221 Screw Terminal.
Figure A-3. USB-6221 Screw Terminal Pinout
Table A-3. Default NI-DAQmx Counter/Timer Pins
Counter/Timer Signal Default Pin Number (Name)
CTR 0 SRC 81 (PFI 8)
CTR 0 GATE 83 (PFI 9)
CTR 0 AUX 85 (PFI 10)
CTR 0 OUT 89 (PFI 12)
CTR 0 A 81 (PFI 8)
CTR 0 Z 83 (PFI 9)
CTR 0 B 85 (PFI 10)
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
AI 4 (AI 4+)
AI 12 (AI 4-)
AI GND
AI 5 (AI 5+)
AI 13 (AI 5-)
AI GND
AI 6 (AI 6+)
AI 14 (AI 6-)
AI GND
AI 7 (AI 7+)
AI 15 (AI 7-)
AI GND
NC
AI GND
AO 1
AO GND
AI 0 (AI 0+)
AI 8 (AI 0-)
AI GND
AI 1 (AI 1+)
AI 9 (AI 1-)
AI GND
AI 2 (AI 2+)
AI 10 (AI 2-)
AI GND
AI 3 (AI 3+)
AI 11 (AI 3-)
AI GND
AI SENSE
AI GND
AO 0
AO GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
PFI 8/P2.0
D GND
PFI 9/P2.1
D GND
PFI 10/P2.2
D GND
PFI 11/P2.3
D GND
PFI 12/P2.4
D GND
PFI 13/P2.5
D GND
PFI 14/P2.6
D GND
PFI 15/P2.7
+5 V
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
PFI 0/P1.0
PFI 1/P1.1
PFI 2/P1.2
PFI 3/P1.3
PFI 4/P1.4
PFI 5/P1.5
PFI 6/P1.6
PFI 7/P1.7
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
NC = No Connect
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