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DB9 Serial Cable - 1.5m

SER-DB9-1-5M

A serial lead for equipment that is configured over an RS-232 port.

Length: 1.5 m
Connectors: DB9-F / DB9-M

In-depth technical details

DB9/RS-232 has 9 pins, but a basic connection only needs 3: pin 2 = RXD (receive), pin 3 = TXD (transmit), pin 5 = GND. The remaining pins carry modem-control signaling most simple serial links don't use.

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From its box

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End A

DB9 (RS-232) (Female)

01 9 pins A 9-pin serial port, but a basic connection only needs 3: pin 2 = RXD (receive), pin 3 = TXD (transmit), pin 5 = GND. The remaining pins carry modem-control handshaking most simple serial links don't use.
02 D-shaped shell The D profile only fits one way round, so the plug cannot be inserted upside-down and bend its pins.
03 Thumbscrews Hand-tightened to hold the plug home. A loose one is why a picture flickers, or loses one colour channel.
04 Strain-relief boot Stops the wires flexing where they leave the plug — the exact point most cables fail.
05 Outer jacket The outer sheath protecting the conductors inside from abrasion and moisture.

Technical illustration, not a photo of the actual product

End B

DB9 (RS-232) (Male)

01 9 pins A 9-pin serial port, but a basic connection only needs 3: pin 2 = RXD (receive), pin 3 = TXD (transmit), pin 5 = GND. The remaining pins carry modem-control handshaking most simple serial links don't use.
02 D-shaped shell The D profile only fits one way round, so the plug cannot be inserted upside-down and bend its pins.
03 Thumbscrews Hand-tightened to hold the plug home. A loose one is why a picture flickers, or loses one colour channel.
04 Strain-relief boot Stops the wires flexing where they leave the plug — the exact point most cables fail.
05 Outer jacket The outer sheath protecting the conductors inside from abrasion and moisture.

Technical illustration, not a photo of the actual product

From the published standard

How it works

A DB9 cable carries an RS-232 serial signal: one pin transmits, one receives, one is ground, and the rest handle control handshaking. Today it is mainly used for configuring older equipment or industrial gear that has no newer interface.

Connector: DB9, 9 pins
Standard: RS-232

This information comes from published sources about this type of product, not from the supplier.

en.wikipedia.org

Technical specifications

Length	1.5 m
Connectors	DB9-F / DB9-M

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