Serial Cards & Adapters

If you're looking for a simple, cost-effective way to connect serial devices in your industrial application or server room, our Serial Cards and Adapters make it easy to add Serial ports (RS-232, RS-422, RS-485 etc.) to your computer through common expansion ports such as PCI and PCI Express, as well as through USB.

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EC1S952

1 Port Native ExpressCard RS232 Serial Adapter Card with 16950 UART

Add a high-speed RS-232 Serial port to your laptop computer via an ExpressCard expansion slot

Your price
$71.99USD

In stock: US: 13 | CA: 2

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IC232485S

Industrial RS232 to RS422/485 Serial Port Converter with 15KV ESD Protection

Convert an RS232 data signal to either RS485 or RS422 with this wall-mountable, ESD-protected adapter

Your price
$92.99USD

In stock: US: 22 | CA: 35

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ICUSB234854I

4 Port Serial Hub USB to RS232/RS485/RS422 Adapter - Industrial USB 2.0 to DB9 Serial Converter Hub - IP30 Rated - Din Rail Mountable Metal Serial Hub - 15kV ESD Protection

Add four ports supporting three serial protocols, to easily connect serial devices to your computer through USB, with 15kV ESD protection

Your price
$253.99USD

In stock: US: 47 | CA: 12

Where to buy StarTech.com products
ICUSB234858I

8 Port Serial Hub USB to RS232/RS485/RS422 Adapter - Industrial USB 2.0 to DB9 Serial Converter Hub - IP30 Rated - Din Rail Mountable Metal Serial Hub - 15kV ESD Protection

Add eight ports supporting three serial protocols, to easily connect serial devices to your computer through USB, with 15kV ESD protection

Your price
$376.99USD

In stock: US: 1 | CA: 7

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ICUSB422

6 ft Professional RS422/485 USB Serial Cable Adapter w/ COM Retention

Add an RS422/485 serial port to your system through USB; features COM port retention

Your price
$71.99USD

Check reseller availability

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PCI1S550

1 Port PCI RS232 Serial Adapter Card with 16550 UART

Add an RS-232 serial port to your PC through a PCI expansion slot

Your price
$36.99USD

In stock: US: 109 | CA: 41

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PCI2S1P

2S1P PCI Serial Parallel Combo Card with 16550 UART

Add a parallel port and two RS-232 serial ports to your PC through a PCI expansion slot

Your price
$42.99USD

In stock: US: 1036 | CA: 56

Where to buy StarTech.com products
PCI2S232485I

2 Port RS232/422/485 PCI Serial Adapter Card w/ ESD Protection

Control and communicate with two serial devices even with mixed RS-232 & 485 protocols

Your price
$125.99USD

In stock: US: 37 | CA: 4

Where to buy StarTech.com products
PCI4S550N

4 Port PCI RS232 Serial Adapter Card with 16550 UART

Add 4 high-speed RS-232 serial ports to your PC through a PCI expansion slot

Your price
$70.99USD

In stock: US: 51 | CA: 10

Where to buy StarTech.com products
PEX1S553LP

1 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART

Add a RS-232 serial port to your standard or small form factor computer through a PCI Express expansion slot

Your price
$57.99USD

In stock: US: 15 | CA: 31

Where to buy StarTech.com products
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