©
National Instruments Corporation
5
NI USB-6221/6229/6251/6259 OEM User Guide
Figure 4.
USB-6221 OEM Connector Pinout
AO 0
AO 1
AI GND
AI GND
AI GND
AI
8
AI 1
AI GND
AI 10
AI
3
AI GND
AI 12
AI 5
AI GND
AI 14
AI 7
AI GND
AO GND
AO GND
NC
AI 0
AI GND
AI 9
AI 2
AO GND
AI
S
EN
S
E
AI GND
AI 11
AI 4
AI GND
AI 1
3
AI 6
AI GND
AI 15
2
4
6
8
10
12
14
16
1
8
20
22
24
26
2
8
3
0
3
2
3
4
1
3
5
7
9
11
1
3
15
17
19
21
2
3
25
27
29
3
1
33
P0.0
P0.1
P0.2
P0.
3
P0.4
P0.5
P0.6
P0.7
PFI 0
PFI 1
PFI 2
PFI
3
PFI 4
PFI 5
PFI 6
PFI 7
PFI
8
PFI 9
PFI 10
PFI 11
PFI 12
PFI 1
3
PFI 14
PFI 15
+5 V
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
D GND
+5 V
2
4
6
8
10
12
14
16
1
8
20
22
24
26
2
8
3
0
3
2
3
4
3
6
38
40
42
44
46
4
8
50
1
3
5
7
9
11
1
3
15
17
19
21
2
3
25
27
29
3
1
33
3
5
3
7
3
9
41
4
3
45
47
49
B
a
nk 0
B
a
nk 0
50-Pin Digit
a
l Connector
3
4-Pin An
a
log Connector
NC = No Connect
