National Instruments USB-622 Series User manual

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USER GUIDE
NI USB-622x/625xOEM
M Series USB-6221/6225/6229/6251/6255/6259 OEM Devices
This document provides dimensions, pinouts, and information
about the connectors, switch, LEDs, and chassis ground of the National
Instruments USB-6221 OEM, USB-6225 OEM, USB-6229 OEM,
USB-6251 OEM, USB-6255 OEM, and USB-6259 OEM devices. It also
explains how to modify the USB device name in Microsoft Windows.
Caution There are no product safety, electromagnetic compatibility (EMC), or
CE marking compliance claims made for the USB-622x/625xOEM devices. Conformity
to any and all compliance requirements rests with the end product supplier.
Figure 1 shows the USB-6221/6251 OEM and USB-6225/6229/6255/6259
OEM devices.
Figure 1. USB-6221/6251 OEM and USB-6225/6229/6255/6259 OEM Devices
Refer to the NI 622x Specifications document for USB-6221/6225/6229
specifications and the NI 625x Specifications document for
USB-6251/6255/6259 specifications. Refer to the M Series User Manual
for more information about USB-622x/625xdevices. You can find all
documentation at ni.com/manuals.
USB-6221/6251 USB-6225/6229/6255/6259

NI USB-622x/625x OEM User Guide 2 ni.com
Dimensions
Figure 2 shows the dimensions of the USB-6221/6251 OEM device.

©National Instruments Corporation 3 NI USB-622x/625x OEM User Guide
Figure 2. USB-6221/6251 OEM Dimensions in Inches (Millimeters)
0.436 (11.07)
0.392 (9.96)
0.362 (9.19)
0.162 (4.11)
0.062 (1.57)
0.000 (0.00)
0.396 (10.06)
0.304 (7.72)
0.256 (6.50)
0.116 (2.95)
0.000 (0.00)
6.950 (176.53)
4x 6.718 (170.63)
6.270 (159.26)
6.140 (155.96)
5.930 (150.62)
0.000 (0.00)
0.200 (5.08)
2.072 (52.63) 3.296 (83.72)
6.200 (157.48)
6.400 (162.56)
0.000 (0.00) 6.400 (162.56)
0.393 (9.98) 0.200 (5.08)
0.918 (23.32) 3.734 (94.84) 3.730 (94.74) 3.180 (80.77) 3.220 (81.79) 3.198 (81.22) 6.013 (152.74) 5.900 (149.86) 5.210 (132.33) 0.390 (9.91)
1.057 (26.85) 1.750 (44.45) 2.300 (58.42) 2.606 (66.19) 3.080 (78.23)
0.200 (5.08)
5.290 (134.37)
6.140 (155.96)
0.304 (7.72)
0.515 (13.08)
2X Ø 0.140 Cutout
in Panel for LEDs
Ø 0.330 Cutout in Panel
for Power Connector
7X Ø 0.125 (3.18)
4X Ø 0.110 (2.79)
0.609 (15.47)
0.442 (11.23)

NI USB-622x/625x OEM User Guide 4 ni.com
Figure 3 shows the dimensions of the USB-6225/6229/6255/6259 OEM
device.
Figure 3. USB-6225/6229/6255/6259 OEM Dimensions in Inches (Millimeters)
0.436 (11.07)
0.392 (9.96)
0.362 (9.19)
0.162 (4.11)
0.062 (1.57)
0.000 (0.00)
0.396 (10.06)
0.304 (7.72)
0.256 (6.50)
0.116 (2.95)
0.000 (0.00)
6.950 (176.53)
4x 6.718 (170.63)
6.270 (159.26)
6.140 (155.96)
5.930 (150.62)
5.839 (148.31)
5.499 (139.67)
0.000 (0.00)
0.200 (5.08)
2.072 (52.63) 3.296 (83.72)
6.200 (157.48)
6.400 (162.56)
0.000 (0.00) 6.400 (162.56)
0.393 (9.98) 0.200 (5.08)
0.918 (23.32) 3.734 (94.84) 3.730 (94.74) 3.180 (80.77) 3.220 (81.79) 3.198 (81.22) 6.013 (152.74) 5.900 (149.86) 5.210 (132.33) 0.390 (9.91)
1.057 (26.85) 1.750 (44.45) 2.300 (58.42) 2.606 (66.19) 3.080 (78.23)
0.200 (5.08)
5.290 (134.37)
6.140 (155.96)
0.304 (7.72)
2X Ø 0.140 Cutout
in Panel for LEDs
Ø 0.330 Cutout in Panel
for Power Connector
7X Ø 0.125 (3.18)
4X Ø 0.110 (2.79)
0.515 (13.08)
0.609 (15.47)
0.442 (11.23)

©National Instruments Corporation 5 NI USB-622x/625x OEM User Guide
I/O Connector Pinouts
Figures 4 through 9 show the connector pinouts for the USB-6221 OEM,
USB-6225 OEM, USB-6229 OEM, USB-6251 OEM, USB-6255 OEM,
and USB-6259 OEM devices.
Refer to the M Series User Manual at ni.com/manuals for more
information about USB-622x/625xsignals and how to connect them.

NI USB-622x/625x OEM User Guide 6 ni.com
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 SENSE
AI GND
AI 11
AI 4
AI GND
AI 13
AI 6
AI GND
AI 15
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
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 13
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
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
Bank 0
Bank 0
Bank 0
50-Pin Digital Connector
34-Pin Analog Connector
NC = No Connect
Bank 0

©National Instruments Corporation 7 NI USB-622x/625x OEM User Guide
Figure 5. USB-6225 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 SENSE
AI GND
AI 11
AI 4
AI GND
AI 13
AI 6
AI GND
AI 15
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
AI GND
AI 24
AI 17
AI GND
AI 26
AI 19
AI GND
AI 28
AI 21
AI 30
AI GND
AI 31
AI 32
AI 33
AI 42
AI GND
AI 43
AI SENSE 2
AI GND
AI 25
AI GND
AI 27
AI 20
AI GND
AI 16
AI 18
AI 29
AI 22
AI 23
AI 40
AI GND
AI 41
AI 34
AI 35
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
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 13
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
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
AI 36
AI GND
AI 37
AI 38
AI 47
AI GND
AI 56
AI 49
AI 50
AI 59
AI GND
AI 60
AI 53
AI 54
AI 63
AI GND
AI 72
AI 65
AI 66
AI 75
AI GND
AI 76
AI 69
AI 70
AI 79
AI 44
AI GND
AI 46
AI 48
AI 57
AI GND
AI 58
AI 45
AI 39
AI 51
AI 52
AI 61
AI GND
AI 62
AI 55
AI 64
AI 73
AI GND
AI 74
AI 67
AI 68
AI 77
AI GND
AI 78
AI 71
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
Bank 0
Bank 0
50-Pin Analog/Digital
Connectors
34-Pin Analog Connectors
Bank 1
Bank 1
Bank 1
Bank 0
Bank 1
Bank 0
NC = No Connect

NI USB-622x/625x OEM User Guide 8 ni.com
Figure 6. USB-6229 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 SENSE
AI GND
AI 11
AI 4
AI GND
AI 13
AI 6
AI GND
AI 15
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
AO 2
AO 3
AI GND
AI GND
AI GND
AI 24
AI 17
AI GND
AI 26
AI 19
AI GND
AI 28
AI 21
AI GND
AI 30
AI 23
AI GND
AO GND
AO GND
NC
AI 16
AI GND
AI 25
AI 18
AO GND
AI SENSE 2
AI GND
AI 27
AI 20
AI GND
AI 29
AI 22
AI GND
AI 31
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
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 13
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
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
P0.8
P0.9
P0.10
P0.11
P0.12
P0.13
P0.14
P0.15
P0.16
P0.17
P0.18
P0.19
P0.20
P0.21
P0.22
P0.23
P0.24
P0.25
P0.26
P0.27
P0.28
P0.29
P0.30
P0.31
+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
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
Bank 0
Bank 0
50-Pin Digital Connectors
34-Pin Analog Connectors
Bank 1
Bank 1
NC = No Connect NC = No Connect
Bank 1
Bank 0
Bank 1
Bank 0

©National Instruments Corporation 9 NI USB-622x/625x OEM User Guide
Figure 7. USB-6251 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
APFI 0
AI 0
AI GND
AI 9
AI 2
AO GND
AI SENSE
AI GND
AI 11
AI 4
AI GND
AI 13
AI 6
AI GND
AI 15
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
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 13
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
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
Bank 0
Bank 0
50-Pin Digital Connector
34-Pin Analog Connector
Bank 0
Bank 0

NI USB-622x/625x OEM User Guide 10 ni.com
Figure 8. USB-6255 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
APFI 0
AI 0
AI GND
AI 9
AI 2
AO GND
AI SENSE
AI GND
AI 11
AI 4
AI GND
AI 13
AI 6
AI GND
AI 15
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
AI GND
AI 24
AI 17
AI GND
AI 26
AI 19
AI GND
AI 28
AI 21
AI 30
AI GND
AI 31
AI 32
AI 33
AI 42
AI GND
AI 43
AI SENSE 2
AI GND
AI 25
AI GND
AI 27
AI 20
AI GND
AI 16
AI 18
AI 29
AI 22
AI 23
AI 40
AI GND
AI 41
AI 34
AI 35
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
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 13
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
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
AI 36
AI GND
AI 37
AI 38
AI 47
AI GND
AI 56
AI 49
AI 50
AI 59
AI GND
AI 60
AI 53
AI 54
AI 63
AI GND
AI 72
AI 65
AI 66
AI 75
AI GND
AI 76
AI 69
AI 70
AI 79
AI 44
AI GND
AI 46
AI 48
AI 57
AI GND
AI 58
AI 45
AI 39
AI 51
AI 52
AI 61
AI GND
AI 62
AI 55
AI 64
AI 73
AI GND
AI 74
AI 67
AI 68
AI 77
AI GND
AI 78
AI 71
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
Bank 0
Bank 0
50-Pin Analog/Digital
Connectors
34-Pin Analog Connectors
Bank 1
Bank 1
Bank 1
Bank 0
Bank 1
Bank 0

©National Instruments Corporation 11 NI USB-622x/625x OEM User Guide
Figure 9. USB-6259 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
APFI 0
AI 0
AI GND
AI 9
AI 2
AO GND
AI SENSE
AI GND
AI 11
AI 4
AI GND
AI 13
AI 6
AI GND
AI 15
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
AO 2
AO 3
AI GND
AI GND
AI GND
AI 24
AI 17
AI GND
AI 26
AI 19
AI GND
AI 28
AI 21
AI GND
AI 30
AI 23
AI GND
AO GND
AO GND
APFI 1
AI 16
AI GND
AI 25
AI 18
AO GND
AI SENSE 2
AI GND
AI 27
AI 20
AI GND
AI 29
AI 22
AI GND
AI 31
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
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 13
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
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
P0.8
P0.9
P0.10
P0.11
P0.12
P0.13
P0.14
P0.15
P0.16
P0.17
P0.18
P0.19
P0.20
P0.21
P0.22
P0.23
P0.24
P0.25
P0.26
P0.27
P0.28
P0.29
P0.30
P0.31
+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
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
Bank 0
Bank 0
50-Pin Digital Connectors
34-Pin Analog Connectors
Bank 1
Bank 1
Bank 1
Bank 0
Bank 1
Bank 0

NI USB-622x/625x OEM User Guide 12 ni.com
Attaching External LEDs
USB-622x/625xOEM devices have two LEDs that reflect the device state.
The green READY LED indicates when the device is powered on and
configured as a USB device. The yellow ACTIVE LED indicates USB bus
activity.
Three connectors on the device allow you to connect an external LED
circuit to the device, as shown in Figure 10. To connect an external READY
LED, use E1 as the positive connection (+3.3 V) and E2 as the negative
connection. To connect an external ACTIVE LED, use E1 as the positive
connection and E3 as the negative connection. E1 is current limited with
a 100 Ωresistor to the 3.3 V internal supply. This configuration limits
the current to approximately 16 mA into a single external LED or
approximately 8 mA each when both LEDs are lit. You also can limit this
current further by using external resistors, also shown in Figure 10.
Figure 10. Schematic for External LED Circuits
E1
External
READY
LED
External
ACTIVE
LED
E2
E3
100 Ω
3.3 V
OEM (On-Board)
E1E2E3

©National Instruments Corporation 13 NI USB-622x/625x OEM User Guide
Power Switch
The power switch on the USB-622x/625xOEM device powers the device
on and off. Figure 11 shows the pins on the power switch and circuitry.
Figure 11. Schematic for the Power Switch
Pin 1, VDC In, is connected to VDC through the fuse (reference designator
XF1). The VDC is the voltage provided by the power supply through the
power connector (reference designator J4/J6/J81) and must be 11–30 VDC,
20 W.
Pin 2, VDC Out, provides power to the circuitry on the device. When the
switch is in the On position, the VDC power supply from pin 1 is routed to
pin 2.
Pin 3, 100 kΩto Ground, connects pin 2 to ground through a 100 kΩ
resistor when the switch is in the Off position.
1 The power connector is designated as J4 on USB-6225/6255 OEM devices, J6 on USB-6221/6229 OEM devices, and J8 on
USB-6251/6259 OEM devices.
J4/J6/J8
VDC Out VDC In
XF1
Switch
123
NC NC
100 kΩ
SW1
Outer
Shell
SW1 XF1
FUSE
3
Power to
Device
J4/J6/J8
Power
Connector
1
2
100 kΩ
100 kΩ
to Ground

NI USB-622x/625x OEM User Guide 14 ni.com
Connecting the USB-622x/625xOEM Device to Your
Chassis
The USB-622x/625xOEM device includes several plated mounting holes
that are designed for customer grounded connections, as shown in
Figure 12.
Caution Do not use the holes labeled A in Figure 12 as mounting holes.
Figure 12. Customer Mounting Holes (USB-6225/6229/6255/6259 OEM Shown)
Mounting Hole Connected
to Chassis Ground
A
A
A
Do Not Use These
as Mounting Holes
A

©National Instruments Corporation 15 NI USB-622x/625x OEM User Guide
Device Components
Table 1 contains information about the components used for interfacing
and interacting with the USB-622x/625xOEM device.
Modifying the USB Device Name in Microsoft Windows
You can change how the USB-622x/625xOEM device name appears when
users install the device in both the Found New Hardware Wizard that
appears when the device is initially installed and in the Windows Device
Manager.
Table 1. USB-622x/625xOEM Components
Component
Reference Designator(s)
on PCB Manufacturer
Manufacturer
Part Number
LEDs DS1 Dialight 553-0332
34-pin connectors (USB-6221/6251 OEM) J1 3M N2534-6002RB
(USB-6225/6229/6255/6259 OEM)
J1, J2
50-pin connectors (USB-6221/6251 OEM) P1 3M N2550-6002UB
(USB-6225/6229/6255/6259 OEM)
P1, P2
USB connector J3 AMP 787780-1
Power connector (USB-6221/6229 OEM) J6 Switchcraft 722RA
(USB-6225/6255 OEM) J4
(USB-6251/6259 OEM) J8
Power switch SW1 ITT Industries,
Cannon
E101J1A3QE2
F 2A L 250V fuse XF1 Littelfuse 217.002
68-pin connectors*(USB-6221 OEM) J8 Honda PCS-E68RLMD1+
(USB-6225/6229/6255 OEM) J7, J8
(USB-6251 OEM) J7
(USB-6259 OEM) J6, J7
*Optional mass termination connectors. These are not populated by default.

NI USB-622x/625x OEM User Guide 16 ni.com
Windows Vista/XP Users
Figure 13 depicts how a USB-6251 (OEM) device name appears in the
Found New Hardware Wizard and Windows Device Manager.
Figure 13. USB-6251 OEM Device in the Found New Hardware Wizard and
Device Manager (Windows Vista/XP)
To modify the device name in the Found New Hardware Wizard and
Windows Device Manager in Microsoft Windows Vista/XP, complete the
following steps.
Note Yo u must have NI-DAQmx 8.6 or later installed on your PC.
1. Locate the OEM
x .inf file in the y :\WINDOWS\inf\ directory,
where
x is the random number assigned to the INF file by Windows,
and
y :\ is the root directory where Windows is installed.
Note New security updates to Microsoft Vista and NI-DAQ 8.6 create random INF files
for NI hardware. Windows assigns random file numbers to all INF files, which causes the
user to search through several INF files until the correct file is located.
If you want to revert back, save a copy of this file as
OEM x _original.inf in a different location.

©National Instruments Corporation 17 NI USB-622x/625x OEM User Guide
2. Edit the device INF file by opening OEM x .inf with a text editor.
At the bottom of this file are the descriptors where Windows looks to
identify the device. Locate the two lines of text that contain in quotes
the descriptors for the device name you are modifying. Change the
descriptor on both lines to the new device name, as shown in Figure 14.
Figure 14. INF File Descriptors Changed to “My Device” (Windows Vista/XP)
3. Save and close the INF file.
4. Go to the Windows Device Manager.
(Windows Vista) In the Device Manager, notice that the OEM device
now appears as My Device, as shown in Figure 15.
(Windows XP) In the Device Manager, right-click the OEM device under
Data Acquisition Devices, and select Uninstall. Power down the OEM
device and disconnect the USB cable from your PC.
When you reconnect and power on the device, it appears as My Device in
the Found New Hardware Wizard and Windows Device Manager, as shown
in Figure 15.
Note When the device is initially installed, the Windows alert message may display the
following: Found New Hardware: M Series USB 62
xx (OEM). This message appears
for a few seconds until the custom name appears and the Found New Hardware Wizard is
launched. This alert message device name cannot be changed.
Original File
Modified File

NI USB-622x/625x OEM User Guide 18 ni.com
Figure 15. “My Device” in the Found New Hardware Wizard and
Device Manager (Windows Vista/XP)
Note Modifying the INF file will not change the USB-622x/625xOEM device name in
Measurement & Automation Explorer (MAX).

©National Instruments Corporation 19 NI USB-622x/625x OEM User Guide
Windows 2000 Users
Figure 16 depicts how a USB-6251 (OEM) device name appears in the
Found New Hardware Wizard and Windows Device Manager.
Figure 16. USB-6251 OEM Device in the Found New Hardware Wizard and
Device Manager (Windows 2000)
To modify the device name in the Found New Hardware Wizard and
Windows Device Manager in Windows 2000, complete the following steps.
Note Yo u must have NI-DAQmx 8.6 or later installed on your PC.
1. Locate the nimioxsu.inf file in the
x :\WINNT\inf\ directory,
where
x :\ is the root directory where Windows is installed.
If you want to revert back, save a copy of this file as
nimioxsu_original.inf in a different location.
2. Edit the device INF file by opening nimioxsu.inf with a text editor.
At the bottom of this file are the descriptors where Windows looks to
identify the device. Locate the two lines of text that contain in quotes
the descriptors for the device name you are modifying. Change the
descriptor on both lines to the new device name, as shown in Figure 17.