NI USB-6221/6229/6251/6259 OEM User Guide 2 ni.com
Dimensions

Figure 2 shows the dimensions of the USB-6221/6251 OEM device.

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)
4.780 (121.41)
6.200 (157.48)
6.400 (162.56)
0.393 (9.98) 0.200 (5.08)
0.918 (23.32)
4.110 (104.39)
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)
2.535 (64.39)
5.080 (129.03)
5.290 (134.37)
5.760 (146.30)
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
2X Ø 0.156 (3.96)
7X Ø 0.125 (3.18)
4X Ø 0.110 (2.79)