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Small Computer Systems Interface (SCSI)

 

Small computer systems interface (SCSI) is an intelligent I/O parallel peripheral bus with a standard, device-independent protocol that allows many peripheral devices to be connected to the SCSI port. A single SCSI bus can drive up to eight devices or units: the host adapter or controller, and seven other devices. Each device is assigned a different SCSI ID, ranging from 0 to 7. SCSI formats include SCSI-1, SCSI-2, SCSI-3, Wide SCSI, Fast SCSI, Wide Fast SCSI, Ultra SCSI, Ultra2 SCSI, Ultra3 SCI (Ultra160), Ultra 320 SCSI, and Ultra640 SCSI.

Products & Services
Motion Controllers
Motion controllers range from simple linear controllers to complex, user-programmable modules that act as controllers within complex integrated multi-axis motion systems.
DC Motor Drives
DC motor drives act as the interface and power supply between a motion controller and a DC motor.
AC Motor Drives
AC motor drives interface controllers to AC motors. They match the control signals (voltage and power levels) as well as the signal type (analog or digital). They also provide power conversion, amplification, and the sequencing of waveform signals.
GPIB Controllers and GPIB Interface Boards
GPIB controllers and GPIB interface boards are devices that enable communications between GPIB buses and GPIB networks.
GPIB Converters
GPIB converters translate data from the GPIB bus to another bus type, and vice versa. For instance, an RS232-to-GPIB converter translates serial commands generated by the RS232 interface into GPIB commands.
Topics of Interest

Compression Technology Video compression technology has enabled more data to be stored in much less space. The 25 Mb/s motion-JPEG (M-JPEG) systems of several years ago have now migrated to MPEG-2...

Overview This chapter begins with a look back on the perceptions of the SCSI interface as it emerged, matured and expanded its presence in the industry. As is common throughout this book, the...

SCSI-2 has significant improvements over SCSI-1 including faster data transfer rates, better connectors, wider bus path, better reliability via synchronous negotiation, and parity checking. SCSI-2 has...

Overview Not long after SCSI-1 was first introduced, its drawbacks became evident. Soon the need for a more advanced interface became obvious and the industry began what would be a long cycle of...

7.4 Storage technologies overview 7.4.1 Small computer systems interface (SCSI) When vendors introduced the first RAID controllers into the PC server marketplace in 1989, their drive...