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Best Multiple Serial Ports

StarTech.com 2S1P PCI Serial Parallel Combo Card with 16550 UART - IEEE 1284 Card - Serial Parallel PCI - PCI Serial Adapter (PCI2S1P)

  • Add a parallel port and two RS-232 serial ports to your PC through a PCI expansion slot.
  • 2S1P PCI Serial Parallel Combo Card with 16550 UART.
  • PCI RS232 Serial Card plus Parallel Port.
  • 2x Serial and 1x Parallel Adapter Card / PCI Serial/Parallel Card Adapter / Serial RS232 Adapter Card with Parallel Port.
  • All three ports share only one IRQ which minimizes the system resources required to operate the card.
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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.
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Fortin EVO-GMT5 Stand-Alone Add-On Remote Start Car Starter System For GMC Full Size Vehicles

  • The EVO-ALL is an ALL-IN-ONE data immobilizer bypass and door lock interface combo module.
  • It uses a multiple bus architecture with 10 separate communication ports that provide more complete functionality on every supported vehicle.
  • 2-way Data-Link port for serial communication with compatible remote car starters and also includes analog plug for compatibility with non 2-way....
  • Multiple bus architecture with 10 separate communication ports that provide more complete functionality on every supported vehicle.
  • For full functionality, installation manual, and to see if this module is compatible with your vehicle please go to Fortin's web site.
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StarTech.com 1 Port USB to Serial RS232 Adapter - Prolific PL-2303 - USB to DB9 Serial Adapter Cable - RS232 Serial Converter (ICUSB232V2)

  • MAXIMIZED PORTABILITY: This USB to serial RS232 adapter converts a USB port into an RS232 DB9 serial port to connect to, monitor, and control a serial device.
  • BROAD COMPATIBILITY: Compatible with your USB 1.0 or 2.0 ports, this USB to RS232 converter works with your Windows, Mac or Linux system.
  • FAST TRANSFER SPEEDS: Experience fast speeds with this USB to DB9 serial adapter, supporting a Baud Rate up to 921.6Kbps.
  • PORTABLE DESIGN: Powered by a USB port, this USB to RS232 serial adapter cable features a lightweight design that conveniently fits into your carrying case, making it ideal for professionals on the go.
  • Install in almost any laptop or desktop computer through broad operating system compatibility, including Windows 8.
  • Communicate efficiently with connected devices with high-speed 921Kbps support.
  • Portable and lightweight, the USB-Powered design requires no additional power adapter.
  • USB to Straight-Through RS232 DB9 Serial Adapter.
  • Compatible with Windows 8, Mac OS X and Linux.
  • USB-powered - no external power adapter required.
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Dell Optiplex 755 Motherboard R092H

  • Genuine Dell MotherBoard For Dell Optiplex 755 SMT Small Mini Tower.
  • CHIPSET:Intel Q35 Express w/ ICH9D0 | SUPPORTED PROCESSOR: Intel Pentium, Celeron, Core 2 Duo, Core 2 Quad, Socket 775.
  • MEMORY: 4 DIMM slots supporting up to: 8 GB of RAM for 64-bit OS, or 4 GB of RAM for 32-bit OS | VIDEO: Integrated Graphics Media Accelerator 3000 | AUDIO: Integrated Audio Sound Controller, ADI 1984 High Definition Audio.
  • PERIPHERAL INTERFACES: (8) 2.0 USB (front and back), (1) parallel printer port, (1) serial ports, 4 - Serial ATA (SATA) Interface Ports, 1 - e-Serial ATA (eSATA) Interface Port, 1- 10/100/1000 Ethernet Port.
  • EXPANSION CAPABILITY:1 PCI-E X16 slot, supports x16, x8, x4, and x1 modes/cards, 1 PCI-E x1 slot, 2 PCI 32Bit / 33MHz slots, 1 FDD connector, Dell Part Numbers : GM819, JR271, Y255C, GM816.
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250W 250 Watt ATX Power Supply Replacement for Dell Dimension B110, 1100, 2200, 2300, 2350, 2400, 2450, 3000, 4300, 4400

  • PROCESSOR(S): Intel P4, Prescott P4, and Celeron D.
  • MEMORY: DDR2 SDRAM (2 DIMMs Slots), Supports DDR2100, DDR2700, DDR3200, Up to 2 GB RAM.
  • VIDEO: Integrated 64 Mb AGP Video Accelerator.
  • PERIPHERAL INTERFACES: 4 - 2.0 USB (front and back), 1 - FDD Interface Port, 2 - IDE Interface Ports, 1- Integrated 10 / 100 Network Port, 1 - Parallel port, 1 - Serial port, 2 - PS/2 ports (keyboard / mouse).
  • PERIPHERAL INTERFACES: 4 - 2.0 USB (front and back) , 1 - FDD Interface Port, 2 - IDE Interface Ports, 1- Integrated 10 / 100 Network Port, 1 - Parallel port, 1 - Serial port, 2 - PS/2 ports (keyboard / mouse).
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StarTech.com PCI Serial Parallel Combo Card with Dual Serial RS232 Ports (DB9) & 1x Parallel LPT Port (DB25) - PCI Combo Adapter Card - PCI Expansion Card Controller - PCI to Printer Card (PCI2S1P2)

  • 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.
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Andifany PCIE 2S Serial Port Card DB-9 Pin -232 Serial Industrial COM Port Expansion Card AX99100 for PC

  • Compatible devices: serial connected devices, serial network/monitoring equipment, data acquisition systems, POS terminals and industrial PCs, serial I/OUSB for add-on cards, I/O expansion for embedded systems.
  • 2S + SPI (PCIe to dual serial and SPI) and LB (PCIe to local bus/ISA)-Like) are suitable for different types of applications..
  • AX99100 is a single-chip solution that can fully integrate PCIe 2.0 Gen 1 endpoint controller and SerDes with various peripherals, such as two/four high-speed serial ports, one parallel port, I2C master, high-speed SPI, local Bus (ISA-Like)) and GPIO..
  • Composed of four main configurations, such as 2S (PCIe to Dual Serial), 2S + 1P (PCIe to dual serial and single parallel),.
  • Single-channel (X1) PCI Express endpoint with integrated PHY controller.
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StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16550 UART - Expansion Card - Windows & Linux (PEX2S553)

  • 2 PORT SERIAL CARD: Serial controller card w/16550 UART based on ASIX MCS9922CV-AA, allows 2x DB9 ports w/bi-directional RS232 speeds up to 460.8Kbps per port, available 256 byte FIFO buffer | Upgraded version of our popular card PEX2S952.
  • OPTIONAL CONFIGURABLE POWER: PCI Express RS232 Serial Adapter Card provides choice of 12v, 5v, or none through pin 9. Each of the 2 ports are individually configurable.
  • STANDARD PROFILE & LOW PROFILE BRACKET: PCIe multiport serial card comes w/ a standard bracket pre-installed & 2x low profile brackets incl for versatile install.
  • VERSATILE APPLICATIONS: For standard profile desktop/servers with uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanners, oscilloscope.
  • THE IT PRO'S CHOICE: Designed and built for IT Professionals, this PCIe serial adapter card is backed for life, including free lifetime 24/5 multi-lingual technical assistance.
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DTECH 6 Feet USB to RS232 DB9 Female Serial Adapter Cable Windows 11 10 8 7 Mac Linux Serial to USB 2.0 (PL2303 Chip)

  • 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).
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StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux (PEX2S953)

  • 2 PORT SERIAL CARD: Serial controller card w/16950 UART based on ASIX AX99100, allows 2x DB9 ports w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer & 9th data bit | Upgraded version of our popular card PEX2S952.
  • OPTIONAL CONFIGURABLE POWER: PCI Express RS232 Serial Adapter Card provides choice of 12v, 5v, or none through pin 9 w/up to 2A total.
  • Each of the 2 ports are individually configurable.
  • STANDARD PROFILE & LOW PROFILE BRACKET: PCIe multiport serial card comes w/ a standard bracket pre-installed & 2x low profile brackets incl for versatile install.
  • VERSATILE APPLICATIONS: For standard profile desktop/servers with uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanners, oscilloscope.
  • THE IT PRO'S CHOICE: Designed and built for IT Professionals, this PCIe serial adapter card is backed for life, including free lifetime 24/5 multi-lingual technical assistance.
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Digi International 70001851 230Kbps Ethernet Device Server

  • Lantronix 2 Port Serial (rs232/ Rs422/ Rs485) To Ip Ethernet Device Server - Us Domestic 110 Vac - Convert From Rs-232.
  • Rs-485 To Ethernet Using Serial Over Ip Technology.
  • One 10/100 Mbps Fast Ethernet Rj-45 Port.
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DTECH USB to Serial Adapter Cable with RS232 DB9 Male Port FTDI Chipset Supports Windows 10 8 7 and Mac Linux - 4 Feet

  • (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.
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