DEM9SK

Shell Material, Finish:	Steel, Yellow Chromate Plated Zinc
Backset Spacing:	--
Contact Material:	Copper Alloy
Wire Gauge:	--
Housing Material:	Polycyclohexylenedimethylene Terephthalate (PCT)
Contact Form:	Machined
Color:	Black
Voltage Rating:	--
Operating Temperature:	-55°C ~ 125°C
Current Rating:	7.5A
Material Flammability Rating:	UL94 V-0
Ingress Protection:	--
Contact Finish Thickness:	Flash
Contact Finish:	Gold
Series:	D*M
Features:	--
Termination:	Solder
Flange Feature:	Housing/Shell (Unthreaded)
Mounting Type:	Panel Mount, Through Hole, Right Angle
Contact Type:	Signal
Shell Size, Connector Layout:	1 (DE, E)
Number of Rows:	2
Number of Positions:	9
Connector Type:	Receptacle, Female Sockets
Connector Style:	D-Sub
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

D-Sub connectors are electrical connectors with contact pins or sockets in two rows. They are usually supplied as male (pins) or female (sockets). Commonly used as power connectors for medium and high-power applications, D-Sub connectors are also sometimes called D-subminiatures, or D-Subs. In this article, we focus on the D-Sub connector and its application in the 9 pin configuration.

D-Sub Connectors

The D-sub connector itself is composed of two elements: the contacts and the shell. The contact pins are often plated with either gold or nickel, while the shell is typically manufactured from either steel or plastic. The shell is generally threaded or tabbed for mechanical fastening to the mating connector and to secure the contacts in place mechanically.The DB-9 standard was originally developed by IBM in the 1970s as a connector specification for the RS-232 serial protocol. A DB-9 connector consists of a 9-pin (3 rows of 3) connector, plus a metal shielding shell. The DB-9 specification was eventually superseded by the DB-25, but it remains a popular connector for certain applications, such as MIDI.

DB9 Application Field

The DB-9 connector is widely used in the fields of computer networking, automation, industrial control, video and audio equipment, and point of sale terminals. It is one of the most popular connectors used in computer serial ports. The DB-9 is often found connected to modems, scanners, printers, terminal controllers, digital-to-analog converters, and many other data-handling devices.DB-9 connectors are also used in serial-controlled robotic systems, where they are used in conjunction with servo motors and other actuators. They are used to convey command signals from the controller to the actuators, and feedback signals from the actuators back to the controller. Such systems often employ the RS-232 serial communication protocol, which requires a DB-9 connector.

DB9 Working Principle

A DB-9 connector consists of nine metal contact pins arranged in a 1x9 line. When mated with its mating half, it allows electrical signals to pass between two components over wire or cable. The most common wiring configuration is called “straight through”, and is designed to mate with a similarly wired cable.In straight-through wiring, pins 1 to 8 are connected to their corresponding pins (1 to 8) on the mating connector. Pin 9 is usually either the common ground or the signal shielding ground, depending on the configuration. The connector pairs are kept in close contact with each other with a plastic locking tab, so that they remain mated when connected.

Conclusion

The D-Sub connector is an extremely versatile and widely used type of electrical connector. This article discussed the DB-9 connector, its application field, and its working principle. It is a useful and reliable connector for a variety of applications in computer networking, automation, industrial control, video and audio equipment, and point of sale terminals.

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