c omputer to scsi c ables cables apple macintosh? scsi cabling usb system mains products networking installation guide utp/stp networking coax networking fibre networking 28 te l : 020 8200 1122 fax: 020 8200 6494 scsi: an explanatory diagram computer scsi interfaces with the rapid development of the scsi system computers are now commonly fitted with a scsi port that can feature any of the following; standard 25 way d type half pitch 50 way d type (scsi ii) half pitch 68 way d type (scsi iii) half pitch 68 way centronics type (scsi v) the standard interface on the card is a female or socket therefore the link cables normally feature a male or plug connector at either end. to accomodate this we have listed the most common combinations. external scsi device interfaces the scsi device itself can have a number of different interfaces. essentially, with scsi v still in its infancy, they can be divided into 4 different generations; scsi i, scsi ii, scsi iii and scsi v. scsi i generation : 50 way centronics connector with transfer rates of up to 5 mbps on an 8 bit bus scsi ii generation: half pitch 50 way d connector with transfer rates of normally 10 mbps, however up to 20 mbps (depending on whether 16 or 32 bit) scsi iii generation: half pitch 68 way d connector with transfer rates up to 20 mbps on 16 bit bus (32 bit use is also possible) scsi v generation: very high density (0.8mm) 68 way centronics connector with transfer rates over 40 mbps on 32 bit bus the standard device output is a female connector, therefore normal link cables are of male to male design. computer (25d skt) to scsi device the 25 way d type is the most common connector found on the earlier computers before users became familiar with populating their own pcs with faster scsi cards in recognition that many new peripherals have much faster capabilities. features: ? zip drive compatible cables ? allows a 25 d type scsi interface to connect to all popular scsi level chain devices stock no. description 1+ 5+ 10+ scsi 1085 25 d plg to 25 d plg (1m) 4.45 3.95 3.45 1085-2 25 d plg to 25 d plg (2m) 4.95 4.45 3.95 1085-3 25 d plg to 25 d plg (3m) 5.95 5.45 4.95 scsi i 1500 25 d plg to 50 cent plg (0.6m) 4.95 4.45 3.95 1511 25 d plg to 50 cent plg (1m) 5.95 5.45 4.95 1512 25 d plg to 50 cent plg (2m) 7.95 7.45 6.95 1500-3 25 d plg to 50 cent plg (3m) 9.95 9.45 8.95 scsi ii 1562 25 d plg to half pitch 50 d plg (1m) 12.95 10.95 9.95 1562-2 25 d plg to half pitch 50 d plg (2m) 14.95 12.95 10.95 scsi iii 1844 25 d plg to half pitch 68 d plg (1m) 18.95 16.95 15.95 1844-2 25 d plg to half pitch 68 d plg (2m) 20.95 18.95 17.95 1085 1511 1562 1844
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