Best Startech Serial Adapters in 2026

Product 1: MAXIMIZED PORTABILITY: This USB to serial RS232 adapter with FTDI features a single cable design removing the need for additional adapters and cables

Product 1: CORRECT DTE/DCE CONFLICTS: Convert your available USB port into a null modem RS232 DB9 serial port, resolving any DTE/DCE conflicts

Product 1: BROAD COMPATIBILITY: Compatible with your USB 1.0 or 2.0 ports, this RS232 converter works with your Windows, Mac or Linux systems

MAXIMIZED PORTABILITY: This USB to serial RS232 adapter with FTDI features a single cable design removing the need for additional adapters and cables

CORRECT DTE/DCE CONFLICTS: Convert your available USB port into a null modem RS232 DB9 serial port, resolving any DTE/DCE conflicts

BROAD COMPATIBILITY: Compatible with your USB 1.0 or 2.0 ports, this RS232 converter works with your Windows, Mac or Linux systems

Converts standard, straight wired cables to null modem wiring

Null modem configuration with pin 9 open.

Slimline design reduces leverage strain on computer ports

Convert your DB9 male connector into an RJ45 female connector

Used for modular RS232 RS422 and RS485 connections

Can be used to make customized serial connections

BROAD COMPATIBILITY: The USB to VGA adapter offers a professional grade solution for connecting legacy or industrial RS232 serial devices to a laptop or desktop computer through USB.

COM RETENTION: The USB to serial RS232 adapter retains assigned serial COM port values in nonvolatile memory to automatically be assigned to the adapter serial port if disconnected and reconnected.

EASY INTEGRATION: A versatile connectivity solution for legacy serial peripheral devices, the USB to RS232 adapter cabler offers broad OS compatibility including Windows, Linux and Mac OS.

MAXIMIZED PORTABILITY: This USB to serial RS232 adapter converts a USB port into an RS232 DB9 serial port to connect to, monitor, and control a serial device

BROAD COMPATIBILITY: Compatible with your USB 1.0 or 2.0 ports, this USB to RS232 converter works with your Windows, Mac or Linux system

FAST TRANSFER SPEEDS: Experience fast speeds with this USB to DB9 serial adapter, supporting a Baud Rate up to 921.6Kbps

M/F

Serial adapter

DB-9 (M) to RJ-45 (F)

F/M

Serial adapter

DB-9 (F) to DB-25 (M)

INDUSTRIAL STRENGTH: Built to withstand harsh environments, this 4 port USB to serial RS232 adapter has a rugged all-metal enclosure for added durability in industrial settings

COM RETENTION CAPABILITIES: For added convenience, this FTDI USB to DB9 RS232 hub features COM retention so COM port assignments are maintained during reboots

PLUG AND PLAY INSTALLATION: This DB9 serial converter is powered by an available USB port / cable so no external power adapter is required

USB TO RS232 SERIAL – 5ft in length serial adapter. Connect legacy DB-9 serial communications devices to a modern computer with USB

EASY TEST - Easy test RS-232 host to device link. With a full LED, dual color display, tester output. This will make testing your connections with ease.

COMPATABILITY - With support on multiple OS platforms this makes our USB RS- 232 very versatile. Supported OS platforms are Windows 7, 8, 10, and 11 as well as Linux and MacOS 10.X

Add an RS232 serial port to a notebook or desktop computer with this Plug-and Play USB adapter cable

USB to Serial

USB to RS232

F/F

Null modem adapter

DB-9 (F) to DB-9 (F)

Product 1: MAXIMIZED PORTABILITY: This USB to serial RS232 adapter converts a USB port into an RS232 DB9 serial port to connect to, monitor, and control a serial device.

Product 1: MAXIMIZED PORTABILITY: This USB to serial RS232 adapter converts a USB port into an RS232 DB9 serial port to connect to, monitor, and control a serial device.

Product 1: MAXIMIZED PORTABILITY: This USB to serial RS232 adapter converts a USB port into an RS232 DB9 serial port to connect to, monitor, and control a serial device.

USB-C TO SERIAL: Interface with Serial RS-232 (DB9) equipment using this black USB Type-C Serial adapter converter cable; Male DB9 connector features screw-lock nuts; Cable length of 16" [40 cm]

TECH SPECS: 921.6 Kbps baud | 512 byte FIFO | Data bits of 5/6/7/8 and stop bits 1/1.5/2 | Parity Modes of None, Xon/Xoff, RTS/CTS, DTR/DSR | Flow control options Odd/Even/Mark/Space/None

APPLICATIONS: Using your laptop's USB-C port, control serial equipment such as PLCs, scanners, sensors, oscilloscopes, medical, scales or receipt printers; Use in manufacturing, scientific, automation

USB-C TO SERIAL ADAPTER CABLE: Interface with Serial RS-232 (DB9) equipment using this USB Type-C Serial adapter converter cable w/ COM port retention; Male DB9 connector features screw-lock nuts; Cable length of 16" [40 cm]

TECH SPECS: 921.6 Kbps baud | 512 byte FIFO | Data bits of 5/6/7/8 and stop bits 1/1.5/2 | Parity Modes of None, Xon/Xoff, RTS/CTS, DTR/DSR | Flow control options Odd/Even/Mark/Space/None | Black

COM PORT CONFIGURATION RETENTION: Using built in, non-volatile memory, this adapter is able to save assigned serial COM port values and automatically re-assign them, even when reconnected to a different port

USB TO SERIAL: Connect serial RS232 (DB9) devices to a computer with this USB to serial adapter. Secure the cable using the screw-lock nuts located on the male serial DB9 connector. Reach peripherals with extended cable length 3 ft (0.91 m)

DEVICE COMPATIBILITY: Use this USB to RS232 serial adapter to reliably connect, configure, and monitor serial devices. Compatible with barcode readers/scanners, network switches, receipt printers, PLCs, medical devices, oscilloscopes, scales, etc.

APPLICATIONS: This USB to serial cable is ideal for IT applications such as server rooms, industrial control/automation, logistics, POS, AV installations, laboratories, etc. Continue using legacy hardware with modern systems, using this USB to RS232 cable

Add one serial RS-232 port with com retention to any laptop or computer with a USB port

USB to Serial

USB to RS232

USB 2.0 TO RS232 SERIAL – 3ft in length serial adapter. Connect legacy DB-9 serial communications devices to a modern computer with USB

EASY TEST - Easy test RS-232 host to device link. With a full LED, dual color display, tester output. This will make testing your connections with ease.

FEATURES - Supports reversible USB type-C connection only, can not be connected to any other USB port. ESD Protection for RS-232 I/O’ +-15KV RS-232 for DTE Mode. PDA RS-232 Port support 56K Modem support Serial Mouse support+ Serial PC camera support.

Convert a DB25 male connector to a DB25 female connector

DB25 Slimline Gender Changer F/F

Serial/Parallel gender changer

Product 1: OPTIMAL CONNECTIVITY: The USB 3.0 to Gigabit Ethernet Adapter adds an RJ45 port to your USB-enabled computer delivering a connection to gigabit Ethernet networks

Product 1: BUILT-IN FEATURES: The Ethernet USB dongle helps conserve system resources through built-in Checksum, Large Send Offload support and Jumbo Frames, with Crossover Detection & Auto-Correction (Auto MDIX) ensuring a reliable connection

Product 1: MAXIMUM COMPATIBILITY: USB to RJ45 adapter is IEEE 802.3, 802.3u and 802.3ab (10BASE-T, 100BASE-TX, and 1000BASE-T) compatible

Add an RS232 Serial Port to any system with an available USB motherboard header

USB to Serial

USB to RS232

USB TO RS232 SERIAL – 5ft in length serial adapter. Connect legacy DB-9 serial communications devices to a modern computer with USB

EASY TEST - Easy test RS-232 host to device link. With a full LED, dual color display, tester output. This will make testing your connections with ease.

COMPATABILITY - With support on multiple OS platforms this makes our USB RS- 232 very versatile. Supported OS platforms are Windows 7, 8 and 10 as well as Linux and MacOS 10.X