With the development of computer and network technology, servers, network communication equipment, and other equipment are moving towards miniaturization, networking, and rack ization. The demand for Jinan chassis and cabinet management in computer rooms will continue to grow. Cabinets/racks will no longer be just containers used to accommodate devices such as servers, and will no longer be low value, ancillary products in IT applications. In the field of integrated wiring, cabinets are becoming an important component of their construction and are receiving increasing attention. Let's talk about the basic content below.
The concept of capacity "u"
The height occupied by the installation of equipment in the 19 inch standard chassis cabinet is represented by a special unit "u", where 1u=44.45mm. U refers to the effective internal usage space of the cabinet, which refers to the number of units that can be installed in 19 inch standard equipment. The panels of standard equipment using 19 inch standard cabinets are generally manufactured according to the specifications of n units,
The concept of grounding
Grounding includes signal grounding and case grounding. The function of signal grounding of equipment is to provide the level reference plane of some or all circuits of the equipment. The ideal grounding plane is a physical entity with zero potential and zero impedance. When any current passes through it, there will be no voltage drop. Generally, signal grounding is realized by a special grounding copper bar; The enclosure grounding is to realize the safe grounding of equipment and prevent electric leakage to protect the safety of operators. Another function is to discharge the accumulated charge on the enclosure due to electrostatic induction, so as to avoid the discharge caused by potential rise, so as to improve the safety of equipment.
The difference between network cabinets and server cabinets
The power cabinet and server cabinet are both 19 inch standard cabinets. The server cabinet is used to install 19 "standard equipment such as servers, monitors, UPS, and non 19" standard equipment. There are requirements for the depth, height, and load-bearing of the cabinet, with a width of 600mm and a depth of 900mm or more. Due to the large heat dissipation capacity of internal equipment, the front and rear doors are equipped with ventilation holes; The network cabinet is mainly used to store network equipment and accessories such as routers, switches, distribution frames, etc. The depth is generally less than 800mm, and the width is both 600 and 800mm. The front door is usually a transparent tempered glass door, which has low requirements for heat dissipation and environment.
Differences between racks and cabinets
They are all used to accommodate 19 inch equipment, but the rack is open and there are no doors in the front, back, left, and right for the installation and construction of related equipment. However, the dust resistance is relatively poor, and compared to the cabinet, it has higher requirements for the external environment. The load-bearing capacity of a 4-pillar rack is greater than that of a 2-pillar rack. The 2-pillar rack accessories are all cantilever mounted and fixed at 2 points. The 4-pillar rack accessories are installed in the same way as the cabinet, fixed at 4 points, while the cabinet is enclosed, which is conducive to protecting internal equipment.
That's all for the answers to some basic knowledge about chassis and cabinets. If you have any doubts or needs about this, please come to our website Consult!