Will this TECHTOO USB to RS232 DB9 adapter work on my Windows or Mac laptop?

Yes, this adapter is designed to work with Windows (up to 10), macOS (10.X/11.X), and Linux. It uses a genuine FTDI chipset, ensuring broad driver support. After initial driver installation, it functions as plug-and-play, maintaining COM port assignments across reboots for seamless integration.

What is the difference between a straight-through and a null modem serial adapter?

This TECHTOO adapter is a straight-through serial adapter, meaning it connects a serial device (like a modem or printer) directly to a computer's USB port. A null modem adapter is used to connect two serial devices directly to each other, crossing transmit and receive lines.

Can I connect a serial mouse to this adapter?

No, this TECHTOO 4-port RS232 USB Serial Adapter does not support devices such as serial mice that require an IRQ number or I/O address. It is designed for devices that communicate directly via RS-232 serial ports without needing these specific hardware interrupts.

How do I install drivers for the TECHTOO USB to Serial adapter?

Driver installation is typically required once. The adapter uses an FTDI chipset, so you can download the latest drivers from the FTDI website or often from the TECHTOO product support page. Once drivers are installed, it should function as plug-and-play.

What devices are compatible with this USB to RS232 adapter?

This adapter is compatible with a wide range of serial devices including modems, GPS receivers, routers, firewalls, printers, cash registers, scanners, and industrial control equipment that use an RS-232 DB9 male port. It works with software like HyperTerminal and TeraTerm.

How to buy an original TECHTOO USB to Serial adapter in India?

Purchase this TECHTOO USB to RS232 DB9 Serial Adapter from crowcrowcrow.com to ensure you receive an authentic, factory-sealed product imported from authorized US retailers. All customs duties and GST are included in the listed price, and it ships via ExpressBox with tracking.

TECHTOO FTDI Chip USB to RS232 Serial Adapter DB9 Male

Name: TECHTOO FTDI Chip USB to RS232 Serial Adapter Cable DB9 Male to Male with Thumbscrews | 1 Mbps Data Transfer
Brand: TECHTOO
SKU: yez4666
Price: 5090.00 INR
Availability: InStock

About this item

The TECHTOO 4-Port USB to RS232 DB9 Serial Adapter bridges the gap between modern USB ports and older serial devices. It allows you to connect up to four RS-232 serial devices, such as modems, GPS receivers, routers, and printers, to your computer. This adapter is powered directly by the USB port, eliminating the need for an external power adapter, and offers plug-and-play functionality after initial driver installation.

Equipped with a high-performance FTDI chipset, this adapter ensures reliable data transfer speeds of up to 1Mbps. It supports automatic handshake and maintains COM port assignments across reboots, crucial for industrial control systems and point-of-sale devices. The adapter is compatible with a wide range of operating systems, including Windows (up to 10), macOS (10.X/11.X), and Linux, making it versatile for various computing environments.

This adapter is ideal for connecting legacy equipment that still relies on RS-232 ports, such as Cisco serial consoles, specific printers, or industrial instruments. While it offers robust connectivity for many devices, it does not support serial mice requiring IRQ or I/O addresses. Ensure your target device uses a standard DB9 male connector and requires RS-232 communication.

Key Features

The TECHTOO High-Speed 4-Port USB-to-DB9-Serial Adapter allows you to connect as many as four 9-pin serial devices to a computer or laptop with a USB Type-A port.
Configuring and sharing data among multiple modems, GPS devices, cellphones, hand-held scanners, point-of-sale systems, touch screens, medical and scientific instruments, industrial process control devices and UPS systems easily
USB to SERIAL RS232 DB9 Adapter (4-PORT): Add four RS232 serial ports to any laptop or desktop computer using a single USB port. The USB to Serial Converter is Powered by an Available USB Cable. No External Power Adapter is Required
COM RETENTION: COM Port assignments maintained across reboot. The USB to serial rs232 adapter plug and play. Compatible for Windows 10 & macOS 10.X / 11.X.
IMPORTANT Note: The TECHTOO 4 port RS232 USB Serial Adapter does not support devices such as serial mice that require an IRQ number or I/O address.

Why choose this product

Seamless Legacy Device Integration

This TECHTOO adapter bridges modern USB ports with essential legacy serial devices. Its FTDI chipset ensures broad compatibility with Windows, macOS, and Linux, supporting up to 1Mbps data transfer. Powered by USB, it offers plug-and-play convenience after driver installation. It's designed for reliable connectivity with modems, GPS units, industrial equipment, and POS systems, maintaining COM port assignments across reboots for uninterrupted operation.

Who It's For vs. Who Should Skip It

Ideal for IT professionals, engineers, and hobbyists needing to connect multiple legacy serial devices like routers, industrial controllers, or specific printers to a modern computer. Skip this adapter if your device requires an IRQ number or I/O address, such as some older serial mice, or if your device uses a different serial connector type (e.g., DB25).

How to use

Download the latest FTDI chipset drivers from the manufacturer's website for your specific operating system (Windows, macOS, or Linux). Install them before connecting the adapter. — Install Drivers
Plug the USB Type-A end of the adapter into an available USB port on your computer. Connect your serial devices to the four DB9 male ports using appropriate serial cables. — Connect Adapter
Your operating system should recognize the adapter and assign COM port numbers. Verify these in your Device Manager. Connect your serial device software (e.g., HyperTerminal) to the assigned COM ports. — Configure COM Ports

Example scenarios

Typical situations where TECHTOO 4-Port USB to RS232 DB9 Serial Adapter Cable Male-to-Male with FTDI Chip | Connects 4 Serial Devices helps — illustrative scenarios, not customer reviews.

Scenario 1

Illustrative example

Where it helps

Connecting legacy industrial equipment in a factory setting.

How this product helps

This 4-port adapter allows seamless integration of older machinery with modern PCs, ensuring reliable data logging and control without needing to replace functional equipment. FTDI chipset guarantees stability.

Scenario 2

Illustrative example

Where it helps

Setting up a point-of-sale system with multiple serial peripherals.

How this product helps

Connect cash drawers, receipt printers, and barcode scanners to a single USB port on a POS terminal. COM port retention ensures consistent device recognition for smooth transactions.

Technical specifications

Setup & usage

Supported Operating Systems	Windows 8.1/8/7/Vista/XP/2000, Android, Mac OS X 10.6+, Linux
Power Source	USB Port
Automatic Handshake	Supported
COM Port Retention	Yes
Plug and Play	Yes (after driver installation)
Maximum Baud Rate	1 Mbps

How we compare

Feature	TECHTOO 4-Port USB	Others
Chipset Reliability	Genuine FTDI chipset ensures broad OS compatibility and stable 1Mbps transfer speeds.	Local adapters may use generic or unbranded chipsets, leading to driver issues or lower transfer rates.
Port Count	Four RS232 DB9 male ports for connecting multiple legacy devices simultaneously.	Most local adapters offer only one or two serial ports, requiring multiple units for similar connectivity.
Driver Support & Stability	Microsoft-signed drivers and FTDI chipset provide robust, plug-and-play performance across Windows, macOS, and Linux.	Driver support for local adapters can be inconsistent, especially on newer OS versions, often requiring manual installation and troubleshooting.
Build Quality	Durable iron construction with thumbscrews for secure connections, designed for industrial environments.	Local adapters may use lighter plastic casings and lack secure locking mechanisms, potentially leading to connection failures.

SKU	yez4666
GTIN	0713458103734
Brand	TECHTOO
Model Number	USB to DB9 Cables
Connector Type	USB Type A
Serial Connector Gender	Male-to-Male
Number of Pins	9
Cable Length	3 feet (0.91 meters)
Material	Iron
Color	2 RS232 Port
Item Shape	Round
Country of Origin	Not stated by manufacturer — US retail version, sourced from authorized US retailers

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Spec
Price

TECHTOO FTDI Chip USB to RS232 Serial Adapter Cable DB9 Male to Male with Thumbscrews | 1 Mbps Data Transfer

Option: 2 RS232 Port / W/Thumbscrews

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About this item

Key Features

Why choose this product

How to use

Example scenarios

Technical specifications

Setup & usage

How we compare

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