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AllPinouts
allpinouts.org › pinouts › cables › serial › 9-pin-to-25-pin-serial
9 Pin to 25 Pin Serial · AllPinouts
This adapter will enable you to connect a 25 pin serialcable to a 9 pin connector at the computer.
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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 - 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. You can also learn RS485 pinout.
Rating: 5 ​ - ​ 367 votes
Discussions

Help needed: 25 PIN to 9 PIN SERIAL connection
that has a 25 Pin serial Are you 100% sure it's actually RS-232 serial? DB-25 connectors are used for countless unrelated interfaces. More on reddit.com
🌐 r/retrocomputing
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February 12, 2021
DB25 serial card
Hey everyone. I'm needing to interface with a UIC Radial machine. It has a 25 pin console connector that plugs into a computer. I'm taking over from… More on reddit.com
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12
0
December 15, 2023
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Details Pin
detailspin.com › home › 25 to 9 pin serial adapter pinout
25 to 9 Pin Serial Adapter Pinout: A Comprehensive Guide
November 23, 2025 - In such cases, a 25 to 9 pin serial adapter comes to the rescue, acting as a bridge between the two different pin configurations. The purpose of this article is to provide a comprehensive understanding of the pinout arrangement in a 25 to 9 pin serial adapter.
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Gilson
gilson.com › default › serial-cable-9-pin-25-pin.html
Serial Cable, 9-Pin/25-Pin - Connect Gilson Instruments Easily
High-quality serial cable for connecting Gilson instruments in a system or to other devices. Reliable and efficient.
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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
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Pinout Guide
pinoutguide.com › SerialPortsCables › SerPrinter9to25_pinout.shtml
Serial Printer (9-25) cable pinout signals @ PinoutGuide. ...
May 30, 2017 - Pinout of Serial Printer (9-25) cable and layout of 9 pin D-SUB female connector and 25 pin D-SUB female connectorUse this cable between computer (DTE) and printer (DTE) devices.
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Spcanywhere
spcanywhere.com › serial-cable-connects-9-pin-to-rs232-gagemux-interface-db25-m-to-db9-f-6-foot-length
Serial Cable - Connects 9 Pin to RS232 GageMux® Interface; DB25-M to DB9-F; 6 foot length
Serial Cable - Connects 9 Pin to RS232 GageMux® Interface; DB25-M to DB9-F; 6 foot length
Overview · Product Description · Computer cable to connect GageMux® RS232 multiplexer 25-pin output to 9-pin computer serial port, 6 feet in length. · Product Videos · Custom Field · Product Reviews · Write a Review · × · Serial Cable - Connects 9 Pin to RS232 GageMux® Interface; DB25-M to DB9-F; 6 foot length
Price   $19.00
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Firewall.cx
firewall.cx › networking › network-cabling › network-serial-cable.html
Serial Direct Cable Connection, DB9, DB25, COM Ports and Pinouts
The 25 pin male connector is pretty much the same as the 9 pin, it's just bigger. Let's have a look at a serial port to see what we are talking about: Figure 2. Physical Serial interface - DB-9 (usually COM1) and DB-25 (usually COM2) Different pinouts are used for the DB-9 and DB-25 connectors ...
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Campbell Scientific
campbellsci.com › 10871-serial-adapter
10871 - RS-232 Data Cable Adapter, DB9 Pin (Male) to DB25 Socket (Female)
The 10871 provides a 9-pin pin (male) connector on one end and a 25-pin socket (female) connector on the other end. Typically,...
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Reddit
reddit.com › r/retrocomputing › help needed: 25 pin to 9 pin serial connection
r/retrocomputing on Reddit: Help needed: 25 PIN to 9 PIN SERIAL connection
February 12, 2021 -

Hello everyone, can someone give me the pinout of a Serial connection between an instrument (Metals Analyzer) that has a 25 Pin serial and a PC COM1 port 9 PIN serial? I think that Is a DCE -> DTE communication. All I seem to find on the internet is the exact opposite. I need the computer to recieve data from the instrument, the software that handles the data works only if the communication is ok, unless it does not load. I've already tried many cables and solutions, need help :(

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Campbell Scientific
campbellsci.com › 7026-cable
7026 - RS-232 Data Cable, DB9 Socket (Female) to DB25 Pin (Male)
The 7026 is a molded, jacketed, serial cable that connects a peripheral's 25-pin serial connector to a computer's 9-pin RS-232 port.
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Details Pin
detailspin.com › home › 9 to 25 serial adapter pinout guide
9 Pin to 25 Pin Serial Adapter Pinout: A Comprehensive Guide
November 21, 2025 - The 9 pin to 25 pin serial adapter serves as an intermediary link between devices equipped with a 9 pin serial port and those with a 25 pin serial port. Its primary function is to convert the pinouts of the two interfaces, ensuring compatibility and proper signal transmission.
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CableWholesale
cablewholesale.com › products › serial-modem-cable › at-modem-cables › product-10d1-02106.php
6ft Serial Cable, UL, DB9 Male to DB25 Male, RS232
Product Description Our 6 foot high quality serial cable features molded connectors and gold plated contacts for superior corrosion resistance ensuring a solid connection for the life of the cable. The connectors are DB9 male to DB25 male supporting 9 conductors. This cable is ideal for connecting ...
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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.
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Cable Tester
cable-tester.com › home › pin out › rs232 pin out
RS232 Pin Out | Connector Reference Guide - Cable Tester
January 5, 2020 - Reference pinout diagrams for DB9 ... serial data communication signaling protocol. D-sub 9pins or 25pins connector is commonly used for RS232....
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CableWholesale
cablewholesale.com › products › serial-modem-cable › at-modem-cables › product-10d1-02325.php
25ft DB9 Female to DB25 Male Serial Cable, UL rated
Product Description This 25 foot ... connection for the life of the cable. Our cable is ideal for connecting 25 pin serial devices to laptops, computers and expansion / interface cards that have a 9 pin serial port....
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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 - The original pinout for RS232 was developed for a 25 pins sub D connector. Since the introduction of the smaller serial port on the IBM-AT, 9 pins RS232 connectors are commonly used.
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Your Cable Store
yourcablestore.com › products › fba-db9-m-m-25
Your Cable Store 25 Foot DB9 9-Pin Serial Cable Male / Male RS232
Your Cable Store 25 Foot DB9 9-Pin Serial Cable Male / Male RS232
Features: - DB9 male connectors on each end - 25 Feet Long - Straight-through (Not a NULL modem cable)
Price   $13.97