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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.
61 to 70 of 73 Results
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

$314.99
13+ In stock In stock
US: 12 | CA: 1
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

$44.99
95+ In stock In stock
US: 79 | CA: 16
In stock Learn More
2 Port ISA RS232 Serial Adapter Card with 16550 UART
ISA2S550
2 Port ISA RS232 Serial Adapter Card with 16550 UART

Add 2 RS232 ports to legacy computer systems through an ISA slot

$49.99
2 Port Native ExpressCard RS232 Serial Adapter Card with 16950 UART
EC2S952
2 Port Native ExpressCard RS232 Serial Adapter Card with 16950 UART

Add 2 high-speed RS-232 Serial ports to your notebook computer via an ExpressCard slot

$87.99
2-Port Dual Voltage WHQL Approved Serial Card with Legacy Port Remap Function
$53.99
1+ In stock In stock
US: 0 | CA: 1
In stock Learn More
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

$123.99
1S1P Native PCI Express Parallel Serial Combo Card with 16950 UART
PEX1S1P952
1S1P Native PCI Express Parallel Serial Combo Card with 16950 UART

Add a parallel and serial port through a standard or low-profile PCI Express slot

$64.99
1+ In stock In stock
US: 0 | CA: 1
In stock Learn More
2 Port PCI Express RS232 Serial Adapter Card with 16950 UART
PEX2S950
2 Port PCI Express RS232 Serial Adapter Card with 16950 UART

Add 2 RS232 serial ports to your standard or small form factor computer through a PCI Express expansion slot

$62.99
4 Port Low Profile Native RS232 PCI Express Serial Card with 16950 UART
PEX4S952LP
4 Port Low Profile Native RS232 PCI Express Serial Card with 16950 UART

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

$120.99
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)

$47.99