Decisive Tactics
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DB-9 Connector Pinout - Decisive Tactics, Inc.
Below is the pinout of a typical 9 pin RS-232 connector, this connector type is also referred to as a DB-9 connector. A computer's COM port (DTE) is usually male, and any peripheral devices you connect to this port usually have a female connector (DCE).
IC-Components
ic-components.com › blog › DB9-Connector-Explained-Pinout,RS-232-Wiring,Types,Uses,and-Specifications.jsp
DB9 Connector Explained: Pinout, RS-232 Wiring, Types, Uses, and Specifications
Inside are nine metal pins arranged in two rows within an insulated insert. Because it is compact, the DB9 connector is used for RS-232 serial communication between electronic devices. The connector comes in male and female types so devices and cables fit properly.
Connecting female 9 pin D-type
I have a 9 pin D-type female, with wires soldered to pins 2, 3 and 5. What is the simplest way of hooking this up to the Yun so I can address serial data received through it? Thank you, More on forum.arduino.cc
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May 5, 2014DB9 to RJ45 serial connect to switch - correct pinout?
This pinout worked for me: RJ45 -> DB9 RTS 1 -> 8 CTS DTR 2 -> 6 DSR TXD 3 -> 2 RXD GND 4 -> 5 GND GND 5 -> 5 GND RXD 6 -> 3 TXD DSR 7 -> 4 DTR CTS 8 -> 7 RTS IIRC, I had to leave one of the ground pins unplugged. http://i.imgur.com/O3RRKQC.jpg *Edit: Here's another picture for clarity. Also, you can push the pins back out with something like a small flathead screwdriver (~1mm). http://i.imgur.com/7hWniXb.jpg More on reddit.com
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July 27, 2017CAN connector pinout
Hi, We have Drive Xavier board. What is the pinout of DB9 CAN connectors ? Each of the connector now carries two CAN buses (at least 4 pins are used), but I cannot find the pinout in documentation. More on forums.developer.nvidia.com
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November 15, 2018serial - Standard pinout for RS-422? - Electrical Engineering Stack Exchange
I am making a custom connector that will carry several signals to a test board including RS-422 RX+/RX- and TX+/TX-. The strange thing is that I didn't find a standard pinout for the DB9 connector ... More on electronics.stackexchange.com
Videos
06:14
DB9 Soldering: Step-by-Step Guide for Perfect Connections - Easy ...
08:27
RS232 DB9 Termination + Testing - Step-by-Step Guide - YouTube
01:43
RS232 Serial Cable Female to Female 9 Pin - YouTube
08:10
DB9 male connector with housing | 9 pin RS-232 - YouTube
02:15
DB9 Female to 3-pin Female cable - YouTube
00:40
DB9 Female Crimp Connector #569 - YouTube
Cable Tester
cable-tester.com › home › pin out › rs232 pin out
RS232 Pin Out | Connector Reference Guide
January 5, 2020 - D-Sub 9 pins female connector for RS232 is typically used on an electronic device (slave). RS232 standard was also implemented using a D-Sub 20pins connector. Nowadays is quite rare to use such a big connector.
Alicat
documents.alicat.com › pinouts › DOC-PINOUT-DB9.pdf pdf
DB9 (Male and Female) Standard Pinout
DB9 (Male and Female) Standard Pinout · Always identify proper wiring via continuity check & color when using multi-strand cables. The calibration certificate for the device should be used as the definitive reference for custom wiring options. Note: Do not connect RS-485 to RS-232 units or cables. Damage will occur. Check part number or contact factory to verify RS-485 functionality. 1 · 6 · 9 · 5 · 5 · 9 · 6 · 1 · Male Connector ·
Metabee
metabee.com › home › blog › d-sub
What is a DB9 Connector? An Essential Guide
September 23, 2025 - The true power of the DB9 connector lies in its standardized pinout, which enables devices from different manufacturers to communicate reliably.
Arduino Forum
forum.arduino.cc › official hardware › classic › yún
Connecting female 9 pin D-type - Yún - Arduino Forum
May 5, 2014 - I have a 9 pin D-type female, with wires soldered to pins 2, 3 and 5. What is the simplest way of hooking this up to the Yun so I can address serial data received through it? Thank you,
Facebook
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DB9 Female Connector PinOUT
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RS Online
assets.rs-online.com › v1698763915 › Datasheets › 6992f1c745a2628f97defd57c329a84b.pdf pdf
DB9-USB-RS232 Module Male & Female Datasheet
February 19, 2010 - (according to TIA standards Male DB9 connectors are to be used only with wiring DTE to UART). The · female DB9-USB-RS232-F module is designed to replace a female DB9 connector of a DCE device
Aggsoft
aggsoft.com › rs232-pinout-cable › nullmodem-db9-to-db9.htm
RS232 Null Modem Cable Pinout (DB9-DB9)
Discover the pinout and signal configurations for creating a reliable RS232 null modem cable, connecting devices with 9-pin DB9 connectors.
ShowMeCables
showmecables.com › blog › post › DB9-Connector-Pinout
DB9 Connector Pinout | ShowMeCables.com
June 28, 2023 - When building or repairing DB9 cable assemblies many customers request a DB9 connector pinout reference drawing in order to determine where each conductor of the cable should be terminated to. There are several primary types of DB9 connector pinout schemes that we will review in blog post. ... First, we will take a look at the DB9 connector pin locations for a male and female DB9 connector.
Juniper Networks
juniper.net › documentation › us › en › hardware › mx2020 › srx4600 › topics › concept › port-rj45-db9-adapter-pinout.html
RJ-45 to DB-9 Serial Port Adapter Pinout Information | Juniper Networks
If your laptop or desktop PC does not have a DB-9 plug connector pin and you want to connect your laptop or desktop PC to the device, use a combination of the RJ-45 to DB-9 socket adapter along with a USB to DB-9 plug adapter. Table 1 provides the pinout information for the RJ-45 to DB-9 serial port adapter.
Virtual COM Port Driver
virtual-serial-port.org › virtual serial port driver › articles › what is serial port › rs232 pinout
All you have to learn about serial connector pinouts
October 3, 2024 - RS232 manages communication flowing between the DTE and DCE using serial pinouts of either the DB9 or DB25 variety. These D-sub connectors can terminate with an RS232 female pinout or DB25 or DB9 male connector pins. Each pin in a 9 or 25 serial connector pinout has its own distinct function.
Reddit
reddit.com › r/networking › db9 to rj45 serial connect to switch - correct pinout?
r/networking on Reddit: DB9 to RJ45 serial connect to switch - correct pinout?
July 27, 2017 -
I ordered a DB9 to RJ45 converter so I can connect to old switches with DB9 female connector.
I ordered two, but I failed the pin-out on the first one. And can't pull back plugs once they're pushed in. Does anyone know the correct scheme to get this working with an old HP 3500 switch to be specific?
http://imgur.com/a/jOFAS picture of the module.
Top answer 1 of 5
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This pinout worked for me: RJ45 -> DB9 RTS 1 -> 8 CTS DTR 2 -> 6 DSR TXD 3 -> 2 RXD GND 4 -> 5 GND GND 5 -> 5 GND RXD 6 -> 3 TXD DSR 7 -> 4 DTR CTS 8 -> 7 RTS IIRC, I had to leave one of the ground pins unplugged. http://i.imgur.com/O3RRKQC.jpg *Edit: Here's another picture for clarity. Also, you can push the pins back out with something like a small flathead screwdriver (~1mm). http://i.imgur.com/7hWniXb.jpg
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There is a DB9 Pin Removal Tool . I don't know if it helps you but now you know. I agree w/ DataX as far as the pinout.
NVIDIA Developer Forums
forums.developer.nvidia.com › autonomous vehicles › drive agx xavier › drive agx xavier general
CAN connector pinout - DRIVE AGX Xavier General - NVIDIA Developer Forums
November 15, 2018 - Hi, We have Drive Xavier board. What is the pinout of DB9 CAN connectors ? Each of the connector now carries two CAN buses (at least 4 pins are used), but I cannot find the pinout in documentation.
US Converters
usconverters.com › index.php
RS232 Pinout : U.S. Converters LLC, Serial Data Communication
Below is the pinout of a typical standard male and female 9-pin RS232 connector, this connector type is also referred to as a DB9 connector.
TD RETAIL
techdelivers.com › home › search › db9 9pin female right angled connector
DB9 9Pin Female Right Angled Connector
DB9 Female Right Angle Connector is the most common type of electrical connector. DB 9 connector is part of the D-sub miniature (D-sub) connector plug and socket family for computer and communication devices. DB-9 pins are arranged in rows of two, as one five-pin row above a four-pin row.
Extron
extron.com › download › files › userman › RS-232cablecard68-1353-01A.pdf pdf
9-pin D Male to Female RS-232 Cable Guide
shorts an input's pin on a remote connector to ground.
Metabee
metabeeai.com › home › blog › rectangular connectors › d-sub connectors › db9 to db25 pinout and wiring explained: how rs232 connections work?
DB9 to DB25 Pinout and Wiring Explained - MetabeeAI
February 25, 2026 - A computer’s COM port (DTE) is ... has a female connector (DCE). Because the RS232 protocol defines signal names from the perspective of the DTE, the following description focuses on the pinout of PC serial ports. The column marked “Direction” shows the signal direction with respect to the DTE. Related Post: DB9 Pinout: The ...
Top answer 1 of 4
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From Wikipedia:
RS-422 only specifies the electrical signaling characteristics of a single balanced signal. Protocols and pin assignments are defined in other specifications. The mechanical connections for this interface are specified by EIA-530 (DB-25 connector) or EIA-449 (DC-37 connector), however devices exist which have 4 screw-posts to implement the transmit and receive pair only. The maximum cable length is 1500 m. Maximum data rates are 10 Mbit/s at 12 m or 100 kbit/s at 1200 m. RS-422 cannot implement a truly multi-point communications network such as with EIA-485, however one driver can be connected to up to ten receivers.
So, according to the Wiki, there indeed is no standard for the pin assignments of RS-422 on a DB-9 connector.
In addition to that, different websites say different things:
So there probably indeed is no standard.
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Most Professional broadcast equipment will use a D-Sub9 with the standard set by Sony:
7 - TX+
2 - TX-
6 - GND
3 - RX+
8 - RX-
4 - GND
The above pinout is for a "Controlled" device such as a VTR. (for a "Controlling" device, TX becomes RX and vice versa).
But as the other contributors have said, you always need to check with the manufacturer. And however things are pinned out, be sure to keep the +/- pairs on the same twisted pair cables. If you, for example, accidentally pair TX+ with RX- on the twisted pair you will get intermittent errors which are nasty to figure out.
Amazon
amazon.com › db9-serial-pinout › s
Amazon.com: Db9 Serial Pinout
DTECH RS232 DB9 to RJ45 Serial Adapter DB-9 Female/Male to RJ-45 Female Ethernet Converter (2 Pack) · DTECH 15 ft Straight Through Serial DB9 Cable Female to Female 9 Pin COM Port Cord for Data Communication (5 Meter. Black) · DTECH 1.5 ft Straight Through Serial DB9 Cable Female to Female ...