4 Port

Serial Adapters - Offering a wide variety of USB to Serial Adapters, USB CAN, and IO Cards providing up to 32 ports

4-Port USB to RS232 Adapter FTDI Cable
CAN BUS
Ethernet to Serial
Serial Cards

Protocol

USB to RS-232
USB to RS-422
USB to RS-485
USB to TTL

Port COunt

1x
2x
4x
8x
16x
32x

4 Port Serial Adapters

4 port USB 2.0 to Serial Industrial Adapter for business or rugged industrial use with mounting options for stability while in operation. We offer many different styles and form factors to support any serial application.

4-Port USB to RS232 Adapter FTDI Cable4-Port USB to RS232 Adapter FTDI Cable
Out of stock

4-Port USB to RS232 Adapter FTDI Cable

RS-232 | FTDI Expand Your Serial Capabilities: Connect your legacy 9-pin serial devices through a USB-A port to add legacy functionality to newer technologies with…

Model# CG-4X232FTDI

$98.95

Out of Stock
USB2-4COM-M 4-Port Serial Adapter4-Port USB 2.0 to RS-232 DB-9 Serial Adapter w/ 15kV ESD Protection & FTDI Chipset

4-Port USB 2.0 to RS-232 DB-9 Serial Adapter w/ 15kV ESD Protection & FTDI Chipset

RS-232 | 384 Bytes Receive | 128 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with optional mountable flanges, the serial adapter…

Model# USB2-4COM-M

$109.95

In stock
USB2-4comi-SI-TB 4-port serial adapterUSB 2 to 4-Port RS232-422-485 Serial TB Adapter B Port

4-Port Industrial USB 2.0 to RS-232 / 422 / 485 Serial TB Adapter w/ Optical Isolation & Surge Protection

RS-232 | RS-422 | RS-485 | 2,000 Bytes Receive | 2,000 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with built in mountable…

Model# USB2-4COMi-SI-TB

$249.99

In stock
Industrial 4-Port RS-232 to Ethernet Data Gateway TCP/IP4-Port Industrial RS-232 to Ethernet Data Gateway TCP/IP Ethernet Data Gateway

4-Port Industrial RS-232 to Ethernet Data Gateway TCP/IP

RS232 to Ethernet The Industrial 4-Port RS-232 to Ethernet Data Gateway adapter addresses the need to connect individual RS-232C devices to an IP-based Ethernet LAN.…

Model# MSD-SRF4X

$219.95

Not in stock - Backorder allowed
USB to RS232 Cable Windows 104-Port USB DB-9 Serial Adapter Solution

4-Port USB DB-9 Serial Adapter Solution

USB to RS232 Cable Windows 11 The USBG-4X2FTDI 4-Port USB DB-9 Serial Adapter is a rugged plastic USB to Serial adapter that allows you to add 4 RS-232…

Model# USBG-4X2FTDI

$76.95

Not in stock - Backorder allowed
4 port USB Serial Adapter w/ Isolation and Surge Protection4 port USB Serial Adapter Type-B Port

4 Port RS-232 USB to Serial Adapter w/ Optical Isolation & Surge Protection

RS-232 | 512 Bytes Receive | 512 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with built in mountable flanges, the serial adapter…

Model# CM-41042

$269.95

In stock
USB to RS232 - 4 Port FTDI Serial - USBG-4FTDI-B4 Port USB to Serial Adapter RS-232 with FTDI Chip 4 Port DB-9 Adapter
Out of stock

4 Port USB to Serial Adapter RS-232 with FTDI Chip

FTDI USB RS232 DB9 Port Adapter The USBG-4FTDI-B 4-Port USB to Serial RS-232 Adapter for newer computers and laptops that no longer include host serial port…

Model# USBG-4FTDI

$87.95

EOL - Discontinued
USB 4-Port Serial AdapterUSB 4-Port Serial Adapter – USB 2.0 to DB-9 Port RS232 with FTDI CHIP DB-9 RS-232 FTDI Adapter

USB 4-Port Serial Adapter – USB 2.0 to DB-9 Port RS232 with FTDI CHIP

USB to RS232 Adapter - FTDI FT232RL Chipset The 4X232P1 USB 2.0 to Quad Serial Adapter features our USB 4-Port serial adapter allows 4 serial…

Model# USBG-4X232P1

$126.95

In stock
USBG-BAY4 - 4 port DB-9 RS232 Adapter to USB adapter imageUSB BAY-4 Port Serial DB-9 RS-232 Adapter with FTDI Chipset

USB BAY-4 Port Serial DB-9 RS-232 Adapter with FTDI Chipset

USB to RS232 Adapter - DB9 Male Ports The USBG-BAY4 is a 4 port DB-9 RS232 to USB serial adapter that is designed for PC,…

Model# USBG-BAY4

$139.95

In stock
USB2-4comi-TB serial adapterUSB2-4COMi-TB adapter connected

USB 2 to Industrial 4-Port RS232-422-485 Serial TB Adapter

Terminal block serial adapter for RS-232/422/485 Our series of Industrial USB 2.0 to terminal block serial adapters support RS-232, RS-422, and RS485 and are designed…

Model# USB2-4COMi-TB

$189.99

In stock
4-Port RS-232 USB to Serial Adapter Data Control Box db-9 male serialUSB-4COM RS232 4 Port Serial Adapter Size Comp

4-Port RS-232 USB to Serial Adapter Data Control Box

RS-232 | 128 Bytes Receive | 384 Bytes Transmit | FTDI Expand Your Serial Capabilities: Connect 4 legacy 9-pin serial devices through a USB-A port…

Model# USB-4COM

$109.95

In stock
USB-4COMi-M USB to 4 Port Serial Adapter4-Port RS-422 / 485 USB to Serial Adapter DIP Switch Controls
Out of stock

4-Port RS-422 / 485 USB to Serial Adapter

RS485 to USB Adapter Auto Transmit A 4-Port RS-422, RS-485 adapter for serial communication that utilizes four external DIP switches for easy access to the signal…

Model# USB-4COMi-M

$197.95

Out of Stock
USB 4 Port Serial DB-9 RS-232 Adapter Box – Prolific ChipsetUSB 4 Port Serial DB-9 RS-232 Adapter Box
Out of stock

USB 4 Port Serial DB-9 RS-232 Adapter Box – Prolific Chipset

USB to RS232 Adapter The USB-4X-RS232 USB to serial converter is designed for PC, thin client, or server to provide instant COM ports expansion via…

Model# USB-4XRS232

$97.95

EOL - Discontinued
USB 2.0 Optical Isolated RS-232 Serial AdapterUSB 2.0 Optical Isolated RS-232 Serial Adapter Power and B Port
Out of stock

USB 2.0 to 4 Port RS-232 Serial Adapter Optical isolated

USB to RS232 Serial Adapter USB 2.0 Serial Adapter with Optical isolation and surge protection is available on each serial port and is individually optically…

Model# USB2-4COM-SI-M

$274.95

EOL - Discontinued
USB to RS485 4 port adapterUSB to RS485 4 port adapter DIP switches

4 Port USB to RS485 High Speed Adapter w/12V DC Power Supply

USB to RS485 Adapter with Failed Signal Check The USB to RS485 adapter installs automatically once connected to a USB port. When a serial device…

Model# CG-UHS4P485

$172.95

In stock
4-Port RS-232 USB to Serial Adapter – Octopus Cable and DIN Rail4-Port RS-232 USB to Serial Adapter – Octopus Cable DIN Rail
Out of stock

4-Port RS-232 USB to Serial Adapter – Octopus Cable DIN Rail

USB to RS232 Industrial Serial Adapter Compact Industrial RS232 Serial Adapter bringing 4 DB9 RS232 Ports from one simple connection. Helps expand your system COM…

Model# USB2-4COM-M-CBL

$109.95

Out of Stock
USB to 4 port RS-422 485 Optically Isolated AdapterUSB to 4 port RS-422 485 Optically Isolated Adapter

4 Port USB to Quad RS-422 485 Optically Isolated Adapter

USB to Serial Adapter for RS422 and RS485 Applications The USB-4COMi-SI-M is a USB to Quad RS-422 485 Optical isolated serial adapter and is designed for…

Model# USB-4COMi-SI-M

$384.95

In stock
4 Port PCI Express RS422/485 w/ Breakout Cable44 Pin Breakout Cable Female Connector
Out of stock

4 Port PCI Express RS422/485 w/ Breakout Cable

PCI Express Card - 4 Port Serial The SG-PCIE4S422485OCT 4 Port PCI Express RS422 RS485 Card adds four new serial ports to your Work Station,…

Model# SG-PCIE4S422485OCT

$197.95

EOL - Discontinued
4 Port PCIe RS422/485 Breakout Cable – Optical ISO & Surge Suppression44 Pin Female Connector for Serial Breakout Cable
Out of stock

4 Port PCIe RS422/485 Breakout Cable – Optical ISO & Surge Suppression

PCI Express Card - RS422 Serial Applications The SG-PCIE4S422485OCTIS 4 Port RS422 Rs485 PCI Express designed to keep your serial applications electrically safe from damage.…

Model# SG-PCIE4S422485OCTIS

$329.95

EOL - Discontinued