1、 Different chassis heights

Whether it is industrial control chassis or server chassis, the unit is u, and u represents the chassis height standard. The standard height of 1U is 1.75 inches, or 44.45 mm. There are usually 1U, 2U, 3U, 4U, 5u and 7U standard industrial control chassis and server chassis. The height difference between 2U chassis and 4U chassis is 2U, that is, 88.9mm

2、 Different space and different heat dissipation

2U chassis space is relatively small; The 4U chassis has large space and many air holes. The exhaust fan that can be installed is more casual, and the heat dissipation is better than that of 2U

3、 Different appearance

Compared with 4U chassis, 2U chassis is not so high. It is relatively small and beautiful. At the same time, the space occupied by 2U chassis is relatively small, so the hosting cost is lower than that of 4U chassis with large space