SCSI Cables, Adapters & Terminators
SCSI: Connectors, Types, Lengths
SCSI (Small Computer System Interface) standard has become on of the key ways of interfacing data storage devices. There are three levels for this cabling standard: SCSI-1, SCSI-2, and SCSI-3. The
most popular connectors used are DB25, 50-Pin Centronics, High Density DB50, 50-Pin IDC, 68-Pin Micro D, 68-Pin Micro Centronics and Ultra High Density 68-Pin.
There are two basic types of
SCSI devices: Single-Ended and Differential. It is important to know that Single-Ended devices can be connected only to other Single-Ended devices. In the same fashion Differntial devices are
compatible with Differential Devices only.
Most frequently the only information required to get the proper SCSI cable for your devices are the two
connector types on the devices to be connected. Only in limited situations it may be necessary to provide to our Sales or Technical Support group the manufacturer and device number for the devices in
SCSI has important distance limitations, however these limitations vary depending on wether or not the
devices being connected are single-ended or differential. Differential cables can be significantly longer
than the single-ended cables. Our Technical Support specialists will provide you with specific guidance on your particular configuration.
The SCSI standard uses a daisy-chain method of connecting the various SCSI devices, and the SCSI chain needs to end with a
terminator. It is recommended that passive terminators be used on systems with a short bus, or when only a few devices are connected on the bus. Active terminators provide optimum termination for almost
all SCSI 2 and SCSI 3 applications. Force perfect terminators should be used when recommended bus lengths are exceeded, or for very high speed applications.
We carry not only a large selection of SCSI cables and adapters but also a complete line of
terminators to provide for all your SCSI configurations needs. We stock the largest variety of SCSI cable types and cable lengths for equipment from all major manufacturers. Our SCSI cables are
constructed to meet or exceed ANSI SCSI 2 and SCSI 3 specifications. With any questions what-so-ever please call our Sales or Technical Support specialists .