Best Serial Card

StarTech.com 4 Port Native PCI Express RS232 Serial Adapter Card with 16550 UART - Low Profile Serial Card (PEX4S553), Green

Add 4 RS-232 serial ports to your standard or small form factor computer through a PCI Express Expansion Slot.
Native single-chip, single lane PCI Express chipset delivers true PCIe performance, up to 48% more efficient than bridge chip designs.
Standard and low profile/half-height brackets included to ensure fitment in any system.
Four high speed RS232 serial ports, with support for data transfer rates up to 128000bps.
256-byte deep FIFO per transmitter and receiver.
Native single-Chip, single lane PCI Express.
Includes half-height/low profile mounting brackets.
Compliant with PCI Express Base Specification 1.1.

PCI CARD WITH SERIAL & PARALLEL PORTS: Using one PCI bus, add a DB25 parallel & two DB9 RS232 ports to your computer.
Serial Parallel PCI Card installs in 2x full profile or 3x low profile expansion slots.
TECH SPECS: Parallel Speeds up to 1.5Mbps | Supports SPP/Byte/ECP/EPP modes | Compatible with IEEE 1284 | Asix MCS9865 chip | RS-232 speeds up to 115.2 Kbps | 16C550 UART | 256 byte FIFO buffer | 5-9 bit character | Even, Odd, No, Space or Mark Parity.
VERSATILE APPLICATIONS: PCI expansion combo card adds LPT Printer & two COM serial ports working with printers, scanners, plotters, point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, oscilloscope.
STANDARD PROFILE & LOW PROFILE BRACKETs: PCI multiport Parallel LPT & dual serial COM adapter card installs using 2x standard bracket (pre-installed) or 3x low profile brackets (incl).
Supports Windows 7 and up, Linux 2.6.x to 5.x.

Fast card reading: convenient and fast time-saving card reading time is less than 1s, card reading distance is less than 0.5s, card reading time is less than 0.2s. Card reading distance: 0~80mm.
Sensitive reading: The internal radio frequency module and its in-line expansion controller are used to read the card sensitively..
Non-slip design: The back of the card reader is a non-slip design with four corners. It is not easy to slide down and can be fixed more stable..
Button material: See the use of high-quality crystal materials, special craftsmanship, wear-resistant, easy to clean, comfortable to touch, increase keyboard life..
Supporting:With PS/2 keyboard interface, USB interface for keyboard emulation, RS-232 serial output, RS-485 serial output. 2.4GHz/Bluetooth wireless transmission..

RS232 USB to serial female adapter cable allows any PC to connect serial devices and programs that communicate through COM ports.
DB9 Serial cable to USB adapter is designed for connecting Serial devices such as DB9 equipped PCs, routers, GPS, Programming machine, barcode scanners, label writers, serial modems, digital cameras, card readers, palm PCs and digital organizers, etc.
6ft USB to serial cable with standard USB Type A Male to standard 9-pin DB9 Female RS-232 serial connector.
USB to RS232 adapter is with Prolific PL-2303 Chipset for widest possible compatibility with Windows 11, 10, 8, 7, XP, Vista, 2000, 98, MacOS8 or higher, Linux 2.4.0 and later, and other platforms..
Note that the interface is 9-pin RS232 Female socket, please make sure that your serial device with a 9-pin Male Port before purchasing this USB to serial port adapter with Prolific PL2303 chipset (NOT FTDI chip).

MEETS INDUSTRY STANDARDS: The 2-port PCI express serial card is compliant with PCI Express 1.0a specification, and it's compatible with 1x, 2x, 4x, 8x and 16x PCI Express slots..
MAXIMUM COMPATIBILITY: The dual port DB9 to PCIe adapter is ideal for system upgrades in a wide range of applications including manufacturing equipment, POS equipment, and security devices..
HIGH-PERFORMANCE COMMUNICATION: The low-profile serial card delivers high-performance serial communication, with support for data transfer rates of up to 460Kbps..
SIMPLE INSTALLATION: The PCI dual serial adapter features IRQ sharing and supports plug-and-play connection. It has a standard-profile bracket installed, and an optional low-profile bracket..

LIMITED EDITION: Each Card Individually Serial Numbered..
NOTES: Refractor Edition - Fleer Ultra Signature Series. This special genuine ROOKIE gold card was made by FLEER in 2000. Each card is serial numbered on back and features a Tom Brady Facsimile Signature over stamped in HOLOGRAPHIC REFRACTOR LEAF..

(It's NOT 15 pin VGA Monitor Cable) The Male Serial to USB cable (9 pin to USB A male) allows your PC to connect RS-232 serial devices and programs that communicate through COM ports.
USB to serial adapter is designed for connecting serial devices such as DB9 equipped PC, router, GPS, Programming machine, barcode scanner, label writer, serial modem, digital camera, card reader, palm PC and digital organizer, etc.
USB to RS232 cord for Windows 10, 8.1, 8, 7, Mac OS 8 or higher, Linux 2.4.0 and later.
FTDI USB to serial cable is built with a high performance quality processor chip (FT232 Chipset), which makes it one of the most reliable com port to usb adapter on the market.
4ft DB9 serial port to USB converter with LED light helps you check the connection status easily.

The 16C650 UART serial port with data transfer rate up to 250Kbps..
The card is compatible with IEEE 1284 -1994 parallel port standard for SPP/Byte/ECP Mode.
It works as standard RS-232 port or with 5V or 12V power output for devices that require power (such as handheld scanners, table scanners, POS displays, etc.), power output configurable via jumpers.
The PCIe serial card can decrease the loading on CPU activity which helps ensure optimal system performance and keep errors from happening..
The card is with dual-profile design which fits full height and low-profile system chassis with the included spare low-profile brackets.