Aggsoft
aggsoft.com › rs232-pinout-cable › RS232.htm
RS232 Port (DB-25). Pinout and Signals
Explore the complete pinout, wiring, and signal details for the RS232 DB25 serial port. Get the essential information you need to check or build a cable.
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 single mistake in wiring can cause failed communication or even device damage. This guide covers everything you need to know about the DB9 to DB25 pinout. It includes RS232 wiring diagrams, the difference between straight-through and null modem cables, and tips on choosing the right one for your devices.
Videos
19:52
How To Wire A DB25 Connector for Audio - YouTube
10:56
RS-232 Explained: Working Principle, Pinout, Cables & Applications ...
06:52
D-Sub Serial DB25 Tascam Macro Soldering Fast Way with pinout diagram.
07:15
Building an RS232 CNC Cable - YouTube
Making a RJ 45 - DB25 RS232 serial plug for Sun Server
Aggsoft
aggsoft.com › rs232-pinout-cable › serial-port-db25.htm
DB25 pinout and signals for the PC RS232 connector
Explore the DB25 pinout and signal configurations for RS232 connectors, essential for understanding PC COM and serial ports. Get detailed insights and diagrams here!
Romtronic
romtronic.com › home › rs232 cable pinout diagrams for embedded applications
RS232 Cable Pinout Diagrams for Embedded Applications | Romtronic
September 30, 2025 - Looking into a DB25 male connector (DTE), the essential pins are: ... Pins 12–19 and 21, 23–25 are secondary or reserved signals, and can usually be left unconnected. Just like DB9, if you only need a one-way link, connecting TX, RX, and ...
Scribd
scribd.com › document › 94216798 › RS232-Wiring-Diagrams
RS232 Wiring and Pinout Diagrams | PDF | Electrical Connector | Electronic Engineering
The document provides pinout diagrams for DB25 and DB9 connectors commonly used for RS232 serial ports. It also includes examples of how to wire connections between computers, modems, and printers, noting that handshake signaling varies and ...
Scribd
scribd.com › document › 507300563 › RS232-on-DB25-RJ45-ABB
RS232 to RJ45 Wiring Standards | PDF | Computer Science | Equipment
This document provides wiring standards and pinout diagrams for RS232 serial connections using DB25, DB9, and RJ45 connectors. It specifies the pin assignments and signals for straight-through and null modem cabling configurations between devices.
Aggsoft
aggsoft.com › rs232-pinout-cable › modem-db9-to-db25.htm
RS232 Serial Modem Cable (DB9-DB25)
Pinout and signals for building a cable for RS232 serial modem (9pin - 25pin). Wiring diagrams and signal details included.
Lammert Bies
lammertbies.nl › home › tutorials on computer interfacing › cables for data interfacing › rs232 serial cables pinout
RS232 serial cable pinout information - Lammert Bies
August 18, 2021 - RS232 serial cables and adapters. Pinout and wiring layout for many situations. DB9 to DB25 conversion and null modem wiring diagrams.
Electroniccircuitsdesign
electroniccircuitsdesign.com › pinout › rs232-db25-pinout.html
RS232 DB25 pinout
RS232 DB25 pinout description Pin No. Name Dir Notes/Description 1 - - Protective/shielded ground
Zytrax
zytrax.com › tech › layer_1 › cables › tech_rs232.htm
Tech Stuff - RS232 Cables and Wiring
Note: This DB25 is NOT the same as the DB25 Parallel port on a PC which is defined here. ... Leave all pins not specified above unconnected. We have received email suggesting that the above pinout looks like DTR from one side is driving into DSR/DCD on the other side - not normally a healthy situation.
Pccompci
pccompci.com › rs232-cable-technology.html
RS232 connector pin assignment - PCCOM
PCCOM RS232 RS422 RS485 Multi-port Serial card,Serial-TCP/IP Communication Product
shadeBlue Help Desk
support.shadeblue.com › hc › en-us › articles › 114094174832-RS232-RS422-RS485-DB9-DB25-serial-port-pinouts-and-loopback-wiring
RS232 / RS422 / RS485 DB9 & DB25 serial port pinouts and loopback wiring – shadeBlue Help Desk
October 27, 2016 - Pinout Diagram for RS232 DB9 serial ports · (Indigo) What will happen to my sessions, data files and preferences when I uninstall or upgrade? (Indigo) My serial port is not showing up in Indigo. Is there a way to access serial ports that are not automatically detected by Indigo?
Arduino Forum
forum.arduino.cc › forum 2005-2010 (read only) › hardware › interfacing
DB25 to RS232 pin wiring - Interfacing - Arduino Forum
March 8, 2009 - hi all, i have a video switcher im connecting via rs232. attached is a picture of the pin diagram, apart from the obvious rx,tx and ground. how can i use the other pins to allow for better connection (common=async?)
Digi International
digi.com › support › knowledge-base › edgeport-rs-232-db9-and-db25-pinout-information
Edgeport RS-232 DB9 and DB25 pinout information | Digi International
Select your product for firmware, drivers, software, knowledge base articles and manuals
Shrubbery Networks
shrubbery.net › ~heas › rs232 › rs232.html
RS232 Cables, Wiring and Pinouts
We have received email suggesting that the above pinout looks like DTR from one side is driving into DSR/DCD on the other side - not normally a healthy situation. The emails miss the point that since both ends are DTEs NEITHER should be attempting to drive the DSR/DCD signals. They are essentialy RX only signals on both sides. ... Use when connecting a DB9 (e.g. a PC) to a DB25 (e.g.
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 - The plugs contain sockets and pins, with each pin numbered and labeled. A serial pinout diagram is presented below. The RS232 protocol uses a 9 pin serial port that can have either male or female connectors.
PBXDom
pbxdom.com › blog › engineering › rs-232-cables-wiring-and-pinouts
RS-232 Cables, Wiring and PinoutsRS-232 Cables, Wiring and Pinouts - PBXDom
May 24, 2021 - These diagrams show the male (grey background) and female (black background) pin numbering for DB9 and DB25 sub-miniature connectors. Generally Pin 1 is marked on the front of the connector right next to the pin – though you may need a magnifying ...
Arduino Forum
forum.arduino.cc › other hardware › general electronics
DB25 serial cable pinout? - General Electronics - Arduino Forum
November 6, 2019 - Hi all, After an hour of googling, I concede to ask this seemingly dumb question here; How is a typical printer cable wired? Is it as I suspect; 17 usable signal pins, and 8 pins that are clustered together to be used as GND? Or are there components hidden in the connector?
Airborn
airborn.com.au › serial › rs232.html
RS232 pinouts and wiring - AirBorn Electronics
RS232 configuration - diagrams of PC connectors for conection of RS232 devices, with and without handshaking
Ciena
my.ciena.com › CienaPortal › s › question › 0D50z00005JK3UtCAL › pinout-diagram-for-the-db-25-craft-cable
Pin-out diagram for the db 25 craft cable
April 17, 2018 - I assume it would be a DB25 to DB9 Cable? Any help with this would be gratefully received. ... Oh, sorry, unfortunately I'm not familiar with Ciena Corestream. Hopefully someone else can help you find what you're looking for. ... I do use the 6500 for a lot of testing here so the pin-out diagram you provided is very useful. Thank you, ... From the CoreStream Turn-Up Test manual (009-2004-458), yes it would appear to be a standard RS232 DB-25 interface as indicated in the required tools section on Page 45 of the manual.