Active Terminators provide a much more stable form of termination than Passive Terminators and are suitable for those longer, higher data rate SCSI cable runs. Terminators designated as 'Active' use a voltage regulator to optimize signal voltage as opposed to those designated 'Passive', which only regulate the line impedance.
- Centronics 50 Male
Centronics 50 Male
At one time this was one of the most common SCSI connectors. Used for scsi-1 applications:
older scanners, controllers, external scsi device cases.
The Centronics 50 connector has 50-pins arranged in two rows one on top of the other.
The top row has 25 pins and the lower row has 25 pins. Used mostly with older 5 MB SCSI-1
Systems. Often called Low-Density SCSI-1 connector. Most SCSI SLOW (5 Mbyte/sec) computers
and host adapters use the Centronics type 50-pin connector. Also some 8-bit Fast computers
and host adapters.
- SCSI 1 - The original standard that was derived from SASI and formally adopted in 1986 by ANSI.
SCSI-1 features an 8-bit bus (with parity), running asynchronously at 3.5 MB/s or 5 MB/s
in synchronous mode, and a maximum bus cable length of 6 meters (just under 20 feet --
compare that to the 18 inch (0.45 meter) limit of the ATA interface). A variation on the
original standard included a high-voltage differential (HVD) implementation whose maximum
cable length was many times that of the single-ended versions.