SCSI cable is a cable used to connect two or more SCSI interfaces, so that data can be transferred between different SCSI devices. Here are some details about SCSI cable:

Introduction:

SCSI (Small Computer System Interface) is a small computer system interface, mainly used for the connection of storage units. SCSI cable was developed by Shugart in the United States in 1979 and recognized by the American Standards Institute (ANSI) in 1986.

Features:

SCSI cable has the characteristics of high-end, high-speed and high-performance. It is a special bus structure that can flexibly allocate and dynamically complete multiple tasks required by the system at the same time.

The SCSI bus defines standard physical and electrical connections, making the application of various peripheral devices more convenient. Its communication protocol regards peripheral devices as logical devices using a set of defined command sets, thereby eliminating hardware incompatibility.

Interface type:

The interface part of the SCSI cable is divided into internal and external. The internal data cable is mainly used to connect optical drives and hard disk devices, while the external data cable is used to connect SCSI devices outside the computer. Common specifications include SCSI 14P, 20P, 26P, 36P, 50P, 68P, and some customers use SCSI 100P.

Application:

SCSI cables have been extended from traditional computer applications to many fields, such as high-speed railways, shipbuilding, industrial equipment, aviation and aerospace, due to their reliable high-speed transmission performance. They are widely used in servo control lines, LVDS line cables and MDR cables.

Cable type:

SCSI cables are divided into two types: internal and external. Internal cables are generally used inside computers and often use twisted pair braided cables to reduce signal interference. External cables are used outside computers and are more beautiful and sturdy in appearance.

Technical details:

The wires in SCSI cables may produce undesirable effects, such as signal reflections and unbalanced loads on the wires connecting the drives. To reduce these effects, terminal matching resistors must be connected to the two physical ends of the SCSI cable.

SCSI uses an interlocked symbol exchange method to send data to the entire bus. Data is transmitted in parallel on the bus one byte at a time. The typical asynchronous transmission rate is about 2 megabytes per second, and the synchronous transmission rate can reach up to 5 megabytes per second.

Selection considerations:

When selecting a SCSI cable, the most important consideration is whether the SCSI connector is suitable, including the number of pins, the shape of the interface, and whether the male and female heads meet the needs of the user’s SCSI device. In addition, the length of the cable and the maximum bus speed supported also need to be considered