SCSI Connector Guide

What are SCSI Connectors?

SCSI or Small Computer Systems Interface is technology designed to connect devices to a computer. SCSI is a bus technology, which means that all devices connect to a central bus and are "daisy-chained" together. The SCSI bus is controlled by a host controller which will typically be built into the motherboard, or it can be from a separate expansion card. A SCSI connector is either external or internal. The cabling/connector requirements depend upon the location of the SCSI bus. SCSI uses three different signaling types, Single-Ended (SE), Differential (HVD or high-voltage differential), and LVD (or low-voltage differential). The most important things to remember when selecting your SCSI cable is the type of connector required by your devices, and the location of the cable, either internal or external.


VHDCI .8mm 68-pin

Male:

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The Very High Density Cable Interconnect or VHDCI .8mm 68-pin connector has 68 pins arranged in two rows one on top of the other. The top row has 34 pins and the lower row has 34 pins. The pin arrangement closely resembles that of a Centronics type interface. This connector is typically used in SCSI-3 applications such as RAID.

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Micro DB68

Male:

Female:

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The Micro DB68 or MD68 connector has 68 pins arranged in two rows one on top of the other. The top row has 34 pins and the lower row has 34 pins. This connector is typically used in SCSI-3 applications such as scanners, removable storage drives, controllers, external CDR/CDRW, and Ultra/2. This connector is also known as High-Density or HD 68 and Half-Pitch or HP68.

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Micro DB50

Male:

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The Micro DB50 or MD50 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. This connector is typically used in SCSI-2 applications such as scanners, removable storage drives, controllers, external CDR/CDRW. This connector is also known as High-Density or HD50 & Half-Pitch or HP50.

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Micro Centronics 50

The Micro 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. This connector is typically used in proprietary SCSI-2 interface applications. This connector is rare.


Centronics 50

Male:

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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. This connector is typically used in SCSI-1 applications such as older scanners, controllers, and external SCSI device cases.

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DB50

The DB50 connector has 50 pins arranged in three rows one on top of the other. The top row has 17 pins, the middle row has 16 pins and the lower row has 17 pins. This connector is typically used in early SCSI applications such as older Sun Sparcstations.


Micro Centronics 60

The Micro Centronics 60 connector has 60 pins arranged in two rows one on top of the other. The top row has 30 pins and the lower row has 30 pins. This is typically used in SCSI applications such as an IBM® RS-6000.


Micro Centronics 68

The Micro Centronics 68 connector has 68 pins arranged in two rows one on top of the other. The top row has 34 pins and the lower row has 34 pins. This is typically used in SCSI applications such as an IBM® RS-6000.


HDI-30

The HDI-30 connector has 30 pins arranged in five rows one on top of the other. Each row has 6 pins. This connector is typically used in SCSI applications for the Apple® PowerBook.


Internal 50-pin SCSI

Male:

Female:

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The internal 50-pin SCSI 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. This connector is typically used in internal SCSI-1/SCSI-2 applications such as hard drives, CD-ROMs, and removable storage drives.

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Internal 68-pin SCSI

Male:

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The internal 68-pin SCSI connector has 68 pins arranged in two rows one on top of the other. The top row has 34 pins and the lower row has 34 pins. This connector is typically used in internal SCSI-2/SCSI-3 applications such as hard drives, CD-ROMs, and removable storage drives.

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