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1x Serial USB

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Gearmo 16 Inch USB to Serial RS232 Win10 FTDI Adapter w/LED

In Stock & ready to ship.
This 16 inch USB to Serial adapter is a tool of choice when supporting serial peripherals in newer computers without serial support. Now supported by Windows 10, this is an ideal solution for device support.
Part# GM-FTDI-LED16
$21.95
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USB to RJ45 RS232 FTDI 6FT Roll Over Console Cable Windows Mac

Limited stock, please call or email for status.
Light blue color 28AWG USB to RJ45 serial RS232 flat console cable cable for data terminal equipment such as Cisco console connections. Using FTDI integration the cable's superior operation is great for network engineers and technicians.
Part# URJ45CCBLU
$14.95
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36 inch USB to Serial RS232 FTDI professional adapter

In Stock & ready to ship.
36 inch rs232 serial adapter with a quality FTDI chipset FT232RL and incorporates a noise reducing ferrite core ring for a clean serial signal. Works with Windows 10 and works with applications such as industrial, lab, and office environments.
Part# GM-FTDI2-A36
$21.95
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12 inch USB to RS232 adapter with FTDI chip

In Stock & ready to ship.
New rs232 12 inch adapter designed to be sleek with a ferrite core ring for noise reduction. The USB adapter includes a FTDI chipset, LED indicators for power, TX, and RX signals and is USB 2.0 compliant with easy plug and play installation.
Part# GM-FTDI2-A12
$18.95
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USB to Serial RS-232 adapter with LED indicators

In Stock & ready to ship.
Newly designed USB to rs232 adapter with full LED serial activity indicators, a new sleek design and modified color scheme give this serial adapter a great look to suit any application. It follows the standard DB9 pinout with hex nut screw lock mechanisms.
Part# GM-FTDI2-LED
$22.95
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USB to RS232 Serial Adapter 3ft. Cable

In Stock & ready to ship.
The GM-FTDI-36 is a 3ft. long USB to RS-232 serial adapter that is compatible with most GPS or PDA. Use your office equipment like modems, scanners, and printers that make use of serial communication. No hassles with installation!
Part# GM-FTDI-36
$19.95
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USB to RS-232 Serial Adapter DB9 - 8 Inch Short Cable

★★★★★
In Stock & ready to ship.
This USB to RS-232 Serial adapter is Windows 10 supported. This standard USB to RS-232 Serial Adapter unit is compatible with most GPS and PDA devices including Garmin, Magellan, and Palm.
★★★★★ Part# USA-FTDI-8
$18.95
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PRO Single Port USB to Serial Adapter with Activity LED 3ft

★★★★★
In Stock & ready to ship.
USB to RS-232 Serial Adapter for Windows 7 32/64 bit FTDI Chip Pro Adapter with LED
★★★★★ Part# USA-FTDI-A36
$19.99
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Windows 7/8 Compatible 36 inch FTDI CHIP DB-9 Serial Adapter High Speed USB SERIAL RS-232

In Stock & ready to ship.
Supports Windows 7 and 8 and Vista (32 and 64-Bit) with Microsoft Certified Drivers. This FTDI CHIP Adapter is with RX/TX and Power LED and supports OS X and VISTA! Want to connect your GPs, modem, or digital camera easily?
Part# USBG-RS232-F36
$19.95
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USB to RS232 TTL | CMOS Adapter Cable with Terminal Block

In Stock & ready to ship.
USB to RS232 TTL voltage settings just got easier! Up until now you've had to make a choice between USB to TTL adapters and their voltage with either or selections. This USB to RS232 TTL/CMOS adapter cable eliminates that by allowing you to choose a voltage setting.
Part# USB-232TTLMOS
$29.95
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Isolated USB to RS232 RS422 RS485 Mountable Terminal Block Adapter

Limited stock, please call or email for status.
RS232 / 422 / 485 Isolated Terminal block adapter, The CM-422485-TBi Isolated USB to serial interface adapter features 2.5kV isolation to ensure these serial devices via the terminal block.
Part# CM-422485-TBi
$89.99
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Isolated USB to RS-232 / RS-422 / RS-485 Adapter DB-9 Male

Limited stock, please call or email for status.
Isolated RS232 / RS422 / RS485, The CM-422485-i Isolated USB to serial interface adapter features 2.5kV isolation to ensure these serial devices by DB-9 port connected require long range or multi-drop capabilities won't be damaged between the PC and serial applications.
Part# CM-422485-i
$69.99
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GearMo Windows 10, 8, 7 Compatible USB Serial Adapter FTDI Chip RS232 DB-9 920K with TX/RX LED

★★★★★
In Stock & ready to ship.
This USB 2.0 RS-232 Serial Adapter is the easiest way to add a serial port to your computer. Newer computers today are unequipped to support peripherals requiring a serial RS-232 connection because they lack serial ports; this affects PDA, digital camera, and GPS type equipment that may be used on your system.
★★★★★ Part# GM-FTDI-LED
$22.95
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16 Port RS232 to USB 2.0 Rackmountable Industrial Hi-Speed Serial Adapter with FTDI Chipset

Limited stock, 4 available.
USB to Serial CG-16COM-MINI 16-Port Industrial RS232 High Speed Serial Adapter is meant to be streamlined and adapted into your existing serial communication architecture. This USB 2.0 to RS232 Adapter is an intelligent expansion. The USB to Serial adapter is mountable to any 19 inch rack and uses screw lock mechanism connectors.
Part# 16COM-MINI
$279.00
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Industrial USB 2.0 to 12-Port DB9 Serial Adapter

Limited stock, please call or email for status.
Rugged 12-Port Serial Adapter, The Industrial USB to 12-Port serial interface adapter ensures 12 serial devices by DB-9 port connected require long range or multi-drop capabilities.
Part# CM-12RS232A
$169.00
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Industrial USB 2.0 to 12-Port DB9 Serial Adapter with Isolation

Limited stock, please call or email for status.
Rugged 12-Port Serial Adapter, The Industrial USB to 12-Port isolated serial interface adapter ensures 12 serial devices by DB-9 port connected require long range or multi-drop capabilities.
Part# CM-12RS232A-ISO
$279.99
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DB9 to Terminal Block 5 Pin Passive Adapter

In Stock & ready to ship.
Passive DB9 Connect to 5-Pin Terminal Converter, The US-485TBP is a serial DB9 to Terminal signal converter from RS232 to a RS485 interface designed for PC, Workstation, Thin Client or.
Part# US-485TBP
$19.95
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FTDI USB to RS-232 / RS-422 / RS-485 Pro Grade Adapter Selectable via Software

In Stock & ready to ship.
USB to RS-232/422/485 Adapter, The USB to serial interface adapter offers an easy way to connect a DB9 serial device to a USB port. All configuration and electrical interface selections are handled through the driver.
Part# CM-RSDB9-PRO
$39.99
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USB to Terminal Wire RS422 RS485 Mini FTDI Plug-in Adapter

In Stock & ready to ship.
The USBG-422MINI is a surge and static protected Mini USB to RS-422/485 Plug-in Adapter using terminal wire connection. The USB to Industrial Single RS-422/485 Plug-in Adapter is designed to make port expansion easy.
Part# USBG-422MINI
$29.95
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USB RS485 Adapter to RJ45 FTDI chip inside

In Stock & ready to ship.
USB to RS-485 adapter provides an extra Serial Com port via USB connection and can be configured to work with RS-485 peripherals such as POS and Industrial Control devices.
Part# USB-RS485-RJ
$15.09
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USB to RS-485 Adapter W/Terminal Block Changer FTDI chip inside

In Stock & ready to ship.
Professional grade USB to RS485 Converter optimized for Windows 7/8/10 and Server 2003/2008. High-Speed and Interface compliance,USB1.1,2.0,3.0, EIA/TIA RS-485.
Part# USB-RS485-AT
$22.98
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USB to Serial RS232 Adapter DB9 Male for Windows 10, 8, 7

In Stock & ready to ship.
USB-COM-PL - 1-Port RS-232 USB-to-Serial Plugin Adapter no Cable included.
Part# USB-COM-PL
$17.95
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Industrial Professional USB Serial Adapter RS232 FTDI with 5Volt Out

In Stock & ready to ship.
USB Serial Adapter RS232 with 5Volt Output Option on Pin9 Selectable Via Jumper, Great for Barcode Scanners and POS devices. FTDI Chip with Windows 7 Drivers Supports Windows 7 and Vista (32 and 64-bit)
Part# USBG-COM-X
$17.29
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USB 2.0 Industrial Adapter User Selectable RS232/422/485 FTDI Chip

Limited stock, 8 available.
USB-COMi+ (USB-COMiPLUS) 1-Port RS-232/422/485 USB-to-Serial Adapter features Easy Mode Setting by Hidden DIP Switch Adds one RS-232, RS-422 or RS-485 serial port by connecting to a USB.
Part# USB-COMiPLUS
$46.99
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USB to Serial RS-422/RS-485 Industrial Single Port Adapter w/FTDI

In Stock & ready to ship.
The USB-COMi-TB USB-to-RS-422/485 Industrial Serial Adapter is designed to make industrial communication port expansion quick and simple. Connecting to a USB port on your computer or USB hub.
Part# USB-COMi-TB
$44.99
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FTDI 6ft. Long USB to Serial Adapter Cable with Screws and Three LED display

★★★★★
In Stock & ready to ship.
FTDI Unique USB to serial adapter cable with screw style db-9 male connector and shielded 6ft. long USB cable that uses the FTDI Chip it also has three color LED display/.
★★★★★ Part# USBG-6ft232-STF
$21.23
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FTDI 10ft. Long USB to Serial Adapter Cable with Screws and Three LED display

In Stock & ready to ship.
FTDI Unique 10ft. USB to serial adapter cable with screw style db-9 male connector and shielded 10ft. long USB cable that uses the FTDI Chip it also has three color LED display.
Part# USBG-10ft232-STF
$26.23
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10ft USB to Serial Adapter Cable with Screws and Three LED display

In Stock & ready to ship.
Unique 3m Prolific USB to serial adapter cable with screw style db-9 male connector and shielded 10ft. long USB cable that uses the Prolific PL-2303 Chip it also has three color LED display.
Part# USBG-3M232-STP
$16.23
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USB to 32 COM RS-232 Serial Adapter Metal case with DIN-Rail FTDI CHIP

In Stock & ready to ship.
USB to 32 Port COM Serial Adapter RS-232 has a Metal Rackmount case that also supports DIN-Rail mounting. The RS232 Serial ports on USB-32com-RM allow further use of existing devices.
Part# USB-32COM-RM
$589.89
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USB to Serial isolated 16 COM RS-232/422/485 adapter with DIN-Rail

The USB-16COMi-RM is an isolated USB to 16 Port COM serial adapter for RS-232 422/485 communication devices. Includes rack mounting kits for industrial use. High speed serial port with the 128 byte FIFO allow high speed communication, even in heavy loaded systems.
Part# USB-16COMi-RM
$549.89
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Isolated USB to 16 COM RS-422/485 Serial Adapter Metal case - DIN-Rail

Limited stock, please call or email for status.
Optically Isolated USB to 16 Port COM Serial Adapter RS-422/485 with Metal case, Rackmount and DIN-Rail mountable, supports RS232/422/485 DB9 male ports with Speed up to 921.6kbps.
Part# USB-16COMi-M
$399.89
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USB-8COMi-M USB to 8X DB-9 Port RS-422/485 Metal case with DIN-Rail

Limited stock, 3 available.
USB-8COMi-M USB to RS-422/485 Adapter connectivity through a Single USB adding up to eight serial port converters with DB9 (9-pin male) connectors, metal housing. (RS-422/RS-485)
Part# USB-8COMi-M
$239.78
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Premium FTDI Chip 4-Port USB to RS232 Serial Converter Cable 6ft.Long

Limited stock, please call or email for status.
Quad Port (4x DB-9 Serial Ports) High Speed USB Serial Adapter FTDI Chip Built in Driver Support for Windows Vista 32/64 and XP 32/62 as well as Windows 7. This USB RS-232-Port DB9 Serial Adapter provides the perfect solution for using all of your legacy serial devices.
Part# 4-Port-FTDI
$56.99
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Premium FTDI Chip USB - RS232 Serial Converter Cable 6ft.Long

Limited stock, please call or email for status.
6ft. USB to RS232 Serial converter cable with FTDI Chip Built in Driver Support for Windows Vista 32/64 and XP 32/62 as well as Windows 7.
Part# FTDI-USB-Serial
$26.99
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USB to Serial 5Volt (TTL level) converter cable which allows for a simple way to connect TTL interface devices to USB

Limited stock, please call or email for status.
The TTL-232R-WE ("wire ended") is a USB to Serial (TTL level) converter cable which allows for a simple way to connect TTL interface devices to USB. The TTL-232R-WE uses a FT232RQ device which is housed inside the USB 'A' connector.
Part# TTL-232R-WE
$26.99
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USB to Serial (TTL level) converter cable 3.3Volt 6ft. Long

In Stock & ready to ship.
The TTL-232R-3V3-WE (wire ended) is a USB to Serial (TTL level) converter cable which allows for a simple way to connect TTL interface devices to USB. This version of FTDI's USB to TTL serial adapter cable has it's I/O pins configured to operate at 3.3V levels.
Part# TTL-232R-3V3-WE
$19.99
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USB to RS485 levels serial converters 6ft.Long

Limited stock, please call or email for status.
USB-RS485-WE The USB-RS485 cables are USB to RS485 levels serial converters. The cables include FTDI's FT232RQ USB to serial UART interface IC device, which handles all the USB signalling, and protocols, plus an appropriate transceiver.
Part# USB-RS485-WE
$19.99
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USB to RS422 levels serial converter 6ft.Long

Limited stock, please call or email for status.
The USB-RS422 cables are USB to RS422 levels serial converter. The cables include FTDIs FT232RQ USB to serial UART interface IC device, which handles all the USB signalling, and protocols, plus an appropriate transceiver. The cable provides a fast, simple method to connect equipment with an RS422 interface to USB.
Part# USB-RS422-WE
$19.99
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USB to RS-232 Communication Cable 6ft.Long

Limited stock, please call or email for status.
USB-RS232-WE cable USB to RS-232 Bare End Cable USB-RS232 converter cable provides a USB to RS232 serial interface with customized end connectors. Features: " Entire USB protocol handled by the electronics encapsulated in USB connector.
Part# USB-RS232-WE
$26.99
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USB to RS-232 DB-9 serial adapter COM port retention Win/Mac/Linux

In Stock & ready to ship.
USB to RS232 Professional, this is the Best and most reliable USB to RS232 adapter anywhere backed by a Five Year Warranty from a USB Company that has been selling USB product for over a decade.
Part# USB-TO-SERIAL-PRO
$24.95
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USB-4COMi-M USB to Quad RS-422/485 Metal case with DIN-Rail

In Stock & ready to ship.
USB-4COMi-M USB to Quad RS-422/485 Serial Adapter for Windows 10, 8, 7 and Server 2003/2008 is housed in a metal chassis to protect the item. External dip switches to easily configure the item.
Part# USB-4COMi-M
$149.78
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RS-232 to RS-485 Converter

In Stock & ready to ship.
This RS232 to RS485 converter is compatible with the RS232C and RS485 standard. It is able to convert RS232 signals to RS485 balanced differential signals and extend the communication distance to 1.2 km.
Part# US-485C
$24.95
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4 Port USB to RS-232/422/485 Auto Setup Adapter Windows Linux Mac

Limited stock, please call or email for status.
4 Port RS232/422/485, software configurable VScom USB-4COM-PRO Transfer Speed up to 921.6kbps RS232, up to 3Mbps RS422/RS485 with Metal case and DIN-Rail mountable.
Part# USBG-4COM-PRO
$299.98
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6ft. Long FTDI CHIP DB-9 Serial Adapter High Speed USB SERIAL RS-232

In Stock & ready to ship.
Supports windows 7 (32 and 64-Bit) FTDI CHIP Adapter with RX/TX and Power LED . Now Supports OS X and VISTA! Want to connect your GPS to your PC but dont have a 9-pin serial port connection? This cable will get you hooked.
Part# USBG-RS232-F72
$26.99
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12 inch DB-9 Serial RS232 FTDI CHIP Adapter Windows 7/8 Compatible

In Stock & ready to ship.
Supports Windows 7 and 8 and Vista (32 and 64-Bit) Microsoft Certified Drivers. FTDI CHIP Adapter with RX/TX and Power LED . Now Supports OS X and VISTA! Want to connect your GPS to your PC that doesn't have a 9-pin serial port connection.
Part# USBG-RS232-F12
$16.99
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Prolific 16 inch USB Serial RS-232 DB-9 Serial Adapter High-Speed

In Stock & ready to ship.
USB to serial Prolific 16 inch RS232 high speed serial adapter with DB9 male connector supports Windows and Mac OS directly from the host USB Port for communication applications.
Part# USBG-RS232-P12
$11.19
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3ft. DB-9 Serial Adapter High Speed USB SERIAL RS-232

In Stock & ready to ship.
This cable will get you hooked. Using this converter cable and the PC interface cable for your unit, you can transfer maps, waypoints, routes and tracks between MapSource and your GPS. USB to RS232 converter cable your computer shows it like a standard COM port!
Part# USBG-RS232-P36
$22.99
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6ft. DB-9 Serial Adapter High Speed USB SERIAL RS-232

In Stock & ready to ship.
Supports windows 7 (32 and 64-Bit) The Only Adapter with RX/TX and Power LED Using Prolific Chip. Now Supports OS X and VISTA! Want to connect your GPS to your PC but dont have a 9-pin serial port connection?
Part# USBG-RS232-P72
$18.99
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Prolific USB to Serial Adaptor DB-9 Serial RS-232 for XP/Vista/7

In Stock & ready to ship.
USB Serial Adapter is designed to make serial port expansion quick and simple. Connecting to a USB port on your computer or USB hub, this USB Serial Adapter instantly adds a serial communication port to your system.
Part# PL-232-03
$29.98
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USB to DB9 RS232 Serial Adapter for Windows XP and VISTA

Limited stock, please call or email for status.
USB Serial Adapter instantly adds a serial communication port to your system with easy plug-and-play and hot-plug features. Plugging the USB Serial Adapter into the USB port, the adapter is automatically detected.
Part# P9-232-RS
$29.98
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USB RS-232 Industrial Adapter Isolated and Surge Protected FTDI Chip

In Stock & ready to ship.
USB Optical isolation & surge protection Adapter RS-232 USB to RS-232 Adapter provides 1 RS232 Serial Port over USB Port, easy Serial Port Expansion over USB Port.
Part# USBG-SSRS1
$59.78
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Prolific USB to Serial USB adapter Cable RS232 DB-9 Male 3ft converter

In Stock & ready to ship.
Prolific Chip serial adapter Works with Windows 7 and Vista 32-bit and Vista 64-Bit as well as XP Home and XP Pro. The USB converter is housed in a strong molded enclosure.
Part# CA-232-1MB
$12.14
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DB-9 Serial Adapter High Speed USB SERIAL RS-232 30inch

In Stock & ready to ship.
DB9 30 inch USB to serial adapter with RX/TX and power LED using Prolific Chip. No external power required and works strictly from the host computer type-A port.
Part# U232-P9AP
$21.95
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USB RS-232 Serial Adapter USB Serial Adaptor Converter Prolific Chip

In Stock & ready to ship.
Mini Prolific RS232 serial adapter that works with Windows 10, 8, 7, and ealier versions of Windows supports a USB to DB9 interface for working with GPS, PDA, POS and other serial devices. This is the perfect way to enable RS232 communications from laptop or PC with no COM port capability.
Part# USBG-4
$12.95
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USB to Serial 16-Port RS-232 Adapter metal case w/DIN-Rail

In Stock & ready to ship.
This 16-Port Serial Adapter is designed for industrial applications to make serial port expansion quick and simple and no IRQ or COM port conflicts, since the ports don't require any additional IRQ, DMA, memory as resources on the system.
Part# USB-16COM-RM
$349.89
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USB-8COMi-RM USB to Octal RS-232/422/485 adapter metal case w/DIN-Rail

Limited stock, 4 available.
This Industrial Grade Rack Mount 8-Port USB Serial Adaptor Metal Case with Built-In 100-240Volt Power Supply uses FTDI chip USB serial Converters part number FT2232C.
Part# USB-8COMi-RM
$279.78
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USB-4COMi-SI-M USB to Quad RS-422/485 Metal case with DIN-Rail

In Stock & ready to ship.
Optical isolated Quad RS-422/485 Serial Adapter is designed to make serial port expansion quick and simple. Connecting to a USB port on your computer or USB hub, the USB Serial Adapter instantly adds four RS-422, or RS-485 serial communication ports to your system.
Part# USB-4COMi-SI-M
$249.78
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USB to RS-232 Optically Isolated Industrial Adapter with DIN-Rail

In Stock & ready to ship.
USB to RS232 serial adapter designed for industrial applications manufactured with a full metal chassis and included Din rail brackets. The serial adapter includes optical isolation of 2000V and 25KV of ESD protection.
Part# USB-COM-SI-M
$59.50
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USB to Serial 2.0 High-Speed USB RS-232 Industrial Adapter w/DIN-Rail

In Stock & ready to ship.
High speed serial adapter for single port RS232 communication via a USB 2.0 connection utilizing FTDI chipset. Designed with an industrial chassis the serial adapter can be mounted with Din rail brackets and supports LED status indicators for power, TxD, and RxD signals.
Part# USB-COM-M
$34.25
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USB-COMi-SI-M USB-to-Optical isolated RS-422/485 Industrial Adapter

In Stock & ready to ship.
optically isolated and sure protected RS422/485 serial adapter with full metal chassis and Din rail support for mounting. It is with Dip switch control for easily controlling the signal parameters to work with. It is very compact and easily installed into any Windows operating system.
Part# USB-COMi-SI-M
$89.78
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1-Port USB to RS-232 Selectable RS-422 or RS-485 Industrial Adapter

★★★★★
In Stock & ready to ship.
Expand your serial port out with this RS232, RS422, RS485 adapter by plugging the Adapter to the USB port, the adapter is automatically detected and installed as a standard Windows COM port ready for use. Provides a unique feature of supplying power output of 5V/150mA through pin-5 of the terminal block to serial device
★★★★★ Part# USB-COMi-M
$54.89
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USB to Serial Adapter RS-232 Cable DB-9 Male for Windows and Mac

★★★★★
In Stock & ready to ship.
Extremely compact but powerful mini serial adapter with DB9 male connector and LED activity monitoring. the adapter is with a translucent blue shell and is very portable, can be used for stenography, point-to-point, and bar code scanning in commercial or industrial use applications.
★★★★★ Part# USBG-232MINI
$18.95
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6ft. Long USB RS-232 Serial Adapter DB-9 Male 32/64 bit WIn 7/ XP

In Stock & ready to ship.
RS232 adapter 6ft. Version works with Windows Vista. USBGear New USB to Serial Adapter USB serial I/O product provides a single USB to RS-232 serial port for providing USB connectivity to legacy or non-USB compliant devices via a DB9 connector.
Part# USBG-232MM
$19.13
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USB to Serial Adapter RS-232 DB-9 Male - Windows 10, 8, 7 and Mac

★★★★★
In Stock & ready to ship.
USB Serial Adapter Supports Windows 8, 7 and Vista (32 and 64-Bit) Install as a standard Windows COM port, Full RS-232 modem control signals, RS-232 data signals; TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND.
★★★★★ Part# USBG-232
$18.09
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USB to Serial RS-232 DB-25 Adapter Cable Detachable cable

Limited stock, please call or email for status.
USB to serial RS-232 DB-25 adapter with detachable cable converts a USB port into a 25-pin male RS-232 serial port capable of speeds up to 230,400 bps.
Part# 765289
$31.97
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USB to Serial RS-232 DB9 FTDI Mini Adapter with Extension Cable

★★★★★
In Stock & ready to ship.
USB to Serial RS-232 DB9 mini adapter with USB 2.0 extension cable is a FTDI based adapter that converts a USB port into a RS232 serial port capable of speeds up to 921,600 bps. It is designed to make serial port expansion easy with plug and play and built-in drivers for older Windows systems. It is installed as a standard Windows COM port.
★★★★★ Part# 765288
$13.13
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USBGear DB-9 Serial PDA Adapter Cable

In Stock & ready to ship.
USBgear DB-9 serial PDA adapter cable provides a single DB-9 serial port for connecting to PDA devices /Palm, Sharp and Windows CE organizers.
Part# USBG-232s
$19.95
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USB to USB Null Modem RS-232 Communication Cable 30ft. Long

Limited stock, please call or email for status.
On modern PCs the legacy COM Port connector is rapidly disappearing as USB becomes the multi-function communication port of choice. However, this presents a dilemma in application areas that previously relied on legacy COM Ports for inter-PC communication.
Part# USBG-NULL-30
$26.99
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USB to USB Null Modem RS-232 Communication Cable 15ft. Long

Limited stock, please call or email for status.
15ft USB to USB Null Modem RS-232 communication cable, each of the USB sockets conceal a small PCB with a FT232RQ based USB-UART converter IC plus support components inside.
Part# USBG-NULL-15
$22.99
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USB to USB Null Modem RS-232 Communication Cable 8ft. Long

Limited stock, please call or email for status.
In the era of legacy PCs with onboard RS232 COM Ports, it was common practice to establish a simple communications network between PCs using a cable popularly known as a Null-Modem cable. Typically, such a cable would have DB9 female connectors on each end with the TX / RX and handshaking.
Part# USBG-NULL-08
$36.99
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MCT USB to RS232 Converter Cable for Garmin GPS Units

Limited stock, please call or email for status.
Want to connect your GPS to your PC but don't have a 9-pin serial port connection? This cable will get you hooked. Using this converter cable and the PC interface cable for your unit, you can transfer maps, waypoints, routes and tracks between Map Source and your GPS.
Part# Garmin-GPS
$23.95
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8 Port USB to RS-232/422/485 Auto Setup Adapter for Windows & Linux

Limited stock, please call or email for status.
8 Port RS232/422/485, software configurable VScom USB-8COM PRO Transfer Speed up to 921.6kbps RS232, up to 3Mbps RS422/RS485 USB PRO Series Software & Hardware Configurable.
Part# USBG-8COM-PRO
$499.98
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2 Port USB to RS-232/422/485 Auto Setup Adapter for Windows Linux and Mac

Limited stock, please call or email for status.
Windows 10, 7/8 Certified Drivers Provided, 2 Port RS232/422/485, software configurable VScom USB-2COM PRO with transfer Speed up to 921.6kbps RS232, up to 3Mbps RS422/RS485.
Part# USBG-2COM-PRO
$159.98
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USB to RS-232/422/485 Auto Setup Adapter for Windows Linux and Mac

Limited stock, please call or email for status.
1 Port RS232/422/485, software configurable USB to Serial Adapter. Overview: Serial ports on USB allow further use of existing devices, even when the computer doesn't offer serial ports.
Part# USBG-COM-PRO
$89.98
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MCT U232-P9 DB-9 Serial Adapter High Speed 230K USB to RS-232

Limited stock, please call or email for status.
Please note that as of late 2015 this product now ships with a Prolific chipset rather than the original Phillips chip.
Part# U232-P9
$23.95
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USB 2 Port 1xSerial DB-9 RS-232 and 1xDB-25 Parallel Printer Adapters with Prolific Chipset

Limited stock, please call or email for status.
Full compliance with the USB Specification V2.0 & USB V1.1 , Plug and Play. Data Transfer Rate : 12Mbps of USB.
Part# USBG-2X1S1P
$48.95