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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.
54 to 63 of 63 Results
4 Port RS232 Mini PCI Express Serial Card w/ 16650 UART
MPEX4S552
4 Port RS232 Mini PCI Express Serial Card w/ 16650 UART

Add Four RS232 Serial Ports to an Embedded System through a mini PCI Express Slot

$163.99
316+ In stock In stock
CA: 1 | US: 315
In stock Learn More
2 Port PCI RS422/485 Serial Adapter Card with 161050 UART
PCI2S4851050
2 Port PCI RS422/485 Serial Adapter Card with 161050 UART

Add two RS422/485 serial ports through a standard or low profile PCI expansion slot

$157.99
75+ In stock In stock
CA: 0 | US: 75
In stock Learn More
1 Port Industrial USB to RS232 Serial Adapter with 5KV Isolation and 15KV ESD Protection
ICUSB232IS
1 Port Industrial USB to RS232 Serial Adapter with 5KV Isolation and 15KV ESD Protection

Add a galvanically isolated RS232 serial port with ESD protection through a USB port - DIN Rail Mountable

$129.99
16-Port Low-Profile Serial Card - RS232 - PCI Express
PEX16S550LP
16-Port Low-Profile Serial Card - RS232 - PCI Express

Add 16 RS232 serial ports (DB9) to your low or full-profile computer, through a PCI Express slot

$435.99
7+ In stock In stock
CA: 0 | US: 7
In stock Learn More
2 Port PCI RS232 Serial Adapter Card with 16550 UART
PCI2S550
2 Port PCI RS232 Serial Adapter Card with 16550 UART

Add 2 high-speed RS-232 serial ports to your PC through a PCI expansion slot

$52.99
387+ In stock In stock
CA: 25 | US: 362
In stock Learn More
2s1p Serial Parallel Combo Mini PCI Express Card for Embedded Systems
MPEX2S1P552
2s1p Serial Parallel Combo Mini PCI Express Card for Embedded Systems

Add two RS232 Serial Ports, and one Parallel Port to an Embedded System, through a mini PCI-Express Slot

$62.99
25+ In stock In stock
CA: 16 | US: 9
In stock Learn More
2 Port PCI Low Profile RS232 Serial Adapter Card with 16550 UART
PCI2S550_LP
2 Port PCI Low Profile RS232 Serial Adapter Card with 16550 UART

Add 2 high-speed RS-232 serial ports to your low profile/small form factor computer with a PCI expansion slot

$68.99
351+ In stock In stock
CA: 9 | US: 342
In stock Learn More
2 Port RS232/422/485 PCI Serial Adapter Card w/ ESD Protection
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

$174.99
62+ In stock In stock
CA: 3 | US: 59
In stock Learn More
2-Port Dual Voltage WHQL Approved Serial Card with Legacy Port Remap Function
$75.99
1+ In stock In stock
CA: 1 | US: 0
In stock
4 Port RS232 PCI Serial Card Adapter with Power Output
PCI4S954PW
4 Port RS232 PCI Serial Card Adapter with Power Output

Add 4 RS232 serial ports with 5V or 12V selectable power output to your computer, through a PCI slot

$172.99
RS232 to TTL Serial Converter - DB9, F/M
IC232TTL
RS232 to TTL Serial Converter - DB9, F/M

Easily convert an RS232 serial signal (-12 to +12V) to a transistor-transistor logic signal (0 to +5V)

$66.99