SCSI connectors

One of the oldest SCSI connectors, the 25-pin DSub connector is the same plug as found on many parallel ports, but SCSI is not interchangeable. It features two rows of low-density pins and thumbscrews.

DB50 - 50 Pin D-Sub

The 50-pin DSub SCSI connector features three rows of low-density pins and thumbscrews. Because of the bulkiness and width of this connector, it is fairly uncommon.

CN50 - 50 pin Centronics

A common SCSI connector on devices is the Centronics 50-pin connector, which features a slot of contacts and wire securing snaps. It is of similar construction to the 36-pin Centronics connector found on parallel printers, but is much wider to accomodate 50 pins. This connector is commonly referred to as SCSI-1.

DH50 - 50 Pin High-Density

Also known as SCSI-2, this connector features two rows of high-density pins with clamping braces. This higher density connector provides the bandwidth of the previous models in much less space.

HS50 - 50 Pin Ribbon

This is the internal companion to the above 50-pin connector sets. The HS50 connector is a crimping connector to mount on ribbon cables, and is almost exclusively used on internal components such as hard drives and optical media drives.

DH68 - 68 Pin High Density

The most common SCSI interface is the 68-pin high-density connector, which features two rows of high-density pins. This connector is known as SCSI-3 and is found on both internal and external components. This connector can also be used for Low-Voltage Differential (LVD) buses.

VHDCI / UHD - 68 pin Ultra-High Density

The Ultra-High Density SCSI connector is an extremely compact 68-pin connector with a slot of contacts and securing screws. This connector is also compatible with LVD buses, and can also be referred to as SCSI-4.