D-sub connectors

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D-sub connectors

(D-SUBminiature connectors) A family of plugs and sockets widely used in communications and on earlier PCs. For example, the analog VGA monitor interface uses a D-sub 15-pin plug and socket. Also called "DB connectors" and "D-subs," they come in 9, 15, 25, 37 and 50 pin varieties. The D-sub designation defines the physical structure of the connector, not the purpose of each line.

Technically Not Always DB
In the international DIN 41625 standard, the letters A through E define the number of pins and follow the D. Although called "DB connectors," the only true DB is the DB-25, because B means 25 pins (see illustration below).

The female DB-25 was widely used in the past for the printer port on a PC (see printer cable). The male DB-25 was also the second serial port (COM2) on the PC when serial ports were popular. It is still widely used for RS-232 communications devices.

DB-9 (DE-9)
The male DB-9 connector (officially DE-9) was typically used for the first serial port on earlier PCs (COM1) as well as other communications devices. See serial port.

DB-15 (DA-15 and DE-15)
Two DB-15 connectors are widely used. The larger, two-row female DA-15 is the game port on a PC, and the smaller, three-row, female high-density DE-15 is the VGA port. See VGA and plugs and sockets.

References in periodicals archive ?
Digi-Data Corporation announces the immediate availability of the A-DB92G-2 Dual DB-9 to Dual GBIC Adapter Card, designed for use in 2-gigabit-per-second Fibre Channel RAID enclosures and Fibre Channel Storage Area Network (SAN) systems.
The A-DB92G Adapter Card's two internal DB-9 connectors can be connected with Fibre Channel copper cables to internal Fibre Channel devices, such as RAID controllers and hubs.
A primary use for the A-DB92G Fibre Channel Converter Card is in RAID enclosures, for example, connecting to the two DB-9 ports of a Fibre Channel RAID controller like the high performance Digi-Data Z-9552 RAID controller.