D-sub connectors

(redirected from DB25)

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).

DB-25
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 ?
com)-- Electro Standards Laboratories (ESL), Cranston, RI, announces Model 8277 DB25 A/B Network Switch that allows access to two networks from one computer or workstation quickly and easily via its front panel rotary switch.
The TurtleCore expansion board connects directly to the Create via DB25 port, drawing power for and providing control to an Overo COM.
Out board--data can be directed to a PC or printer through standard USB "A" and "B" or DB25 connectors in the docking module.
The 26- and 28-pin M27 connector can be used for various industries, including pharmaceutical, replacing DB25 and DSUB style connectors where DB25 connectors are limited to 30V and low current.
A 10' DB9 extension cable is provided, as well as a DB9 to DB25 adapter.
without batteries, also features a rain-resistant sealed keyboard and case and rain-resistant DB25 connector.
Built-in RS-232, DB9 male and RS-232/ RS-422/ RS-485, DB25 female interfaces for PLC and other controllers communications
Three (3) DB25 female connectors labeled A, B and COMMON provide input/output for the DB25 channel.
Additional I/O ports provided via cable connections include two additional DB9 serial ports (for a total of four), two additional USB ports (for a total of four), a DB25 parallel port, three audio jacks (line in, line out and microphone in).
Other specifications included 24VDC power, ST fiber-optic connectors, and DB25 female electrical connectors.
Built-in RS-232/ RS-422/ RS-485, DB25 interfaces for PLC and other controller communications
com)-- Electro Standards Laboratories, Cranston, RI, announces the new Model 9451 DB25 A/B/C Switch.