Get exclusive deals with our weekly newsletter!
Toll Free: 1 (866) 800-8060
Monday to Friday: 6:30am to 6pm Pacific Time
We're here to help. Call us!

Reach us Monday to Friday, 6:30am to 6:00pm Pacific Time.

  • Toll Free: 1 (866) 800-8060
  • Vancouver BC: (604) 739-8060
  • Victoria BC: (250) 800-2569
  • Calgary AB: (403) 775-1291
  • Edmonton AB: (780) 628-6630
  • Winnipeg MB: (204) 800-4372
  • Toronto ON: (416) 800-4312
  • Ottawa ON: (613) 686-4717
  • Montreal QC: (438) 288-3640
  • Quebec City QC: (418) 263-4870
  • Halifax NS: (902) 800-4465
We deliver FAST
  • Same Day Shipping
  • Warehouse Pickups ($100+)
  • Vancouver Service Centre Pickups
Why choose Frontier PC?
  • Proudly Canadian for 22 years
  • Delivery from local warehouses
  • Same day local shipping
  • Real-time stock & pricing
  • Enhanced product information
  • Dedicated account reps
  • Secure online checkout

Order online or by phone before noon local time and you order of in-stock item will ship on the same business day.

  Category: Controllers > Multiport Serial Adapters

Browse top sellers, or select a category from the left.
SIIG CyberSerial JJ-E20011-S3 2-port Multiport Serial Adapter

PCI Express x1 - 2 x DB-9 RS-232 Serial Via Cable

Quick Info Web ID: 1016570724 Mfr. Part: JJ-E20011-S3
PCI Express 1-lane (x1) adapter works with PCI Express slots with different lane width. Installs in any available PCI Express slot. Two high-speed serial ports (9-pin) support asynchronous baud rates up to 15 Mbps. Works as standard RS232 port or with 5V or 12V power output for devices that require power (such as handheld scanners, table scanners, POS displays, etc.). Configurable via jumpers with silk-screened settings on PCB. Spare enhanced low profile bracket is included to work in low profile chassis.

StarTech.com 4 Port Low Profile Native RS232 PCI Express Serial Card with 16950 UART

PCI Express - 4 x DB-9 Male RS-232 Serial Via Cable - Plug-in Card

Quick Info Web ID: 1015391181 Mfr. Part: PEX4S952LP
The PEX2S952LP low profile/half-height PCI Express Serial Card turns a PCI Express slot into two RS232 (DB9) serial connections. The card is constructed using a native single chip design that lets you harness the full capability offered by PCI Express (PCIe), while reducing the load applied to the CPU by as much as 48% over conventional bridge chip serial cards. The PCI Express RS232 Serial Adapter Card is compatible with a broad range of operating systems, including Windows 2000/XP/2003/Vista, Linux Kernel 2.6.11 and up, and ships with a low profile bracket installed but includes an optional full profile bracket that lets you add two serial ports to virtually any computer (regardless of the case form factor).

StarTech.com 4 Port RS232 PCI Express Serial Card w/ Breakout Cable

PCI Express x1 - 4 x DB-9 Male RS-232 Serial Via Cable - Plug-in Card

Quick Info Web ID: 1019462157 Mfr. Part: PEX4S553B
The PEX4S553B 4-Port PCI Express Serial Card (with breakout cable) lets you add 4 RS232 serial ports using a single PCIe expansion slot. The PCIe Serial Card includes a 1-to-4 break out cable, which enables you to add 4 serial ports to a single low profile slot. The serial adapter card features a native single-chip design that provides optimum reliability and speed, reducing the CPU load by up to 48% over conventional bridge-chip serial cards - a cost-effective solution for connecting legacy serial devices to PCIe-enabled computers. The multi-port serial adapter includes both full profile/height and low profile/half-height brackets for compatibility with standard and small form factor computers, and is compatible with a broad range of operating systems, including Windows 7/Server 2008 R2, 2003/Vista/XP (32 and 64 bit), Linux Kernel 2.6.11 and up, as well as MAC OS 10.5 and above.

StarTech.com 2 Port RS232 PCI Express Serial Card w/ Breakout Cable

PCI Express - 2 x DB-9 Male RS-232 Serial

Quick Info Web ID: 1021141454 Mfr. Part: PEX2S553B
Add 2 RS-232 serial ports to your standard or small form factor computer through a PCI Express expansion slot. The PEX2S553B 2-Port PCI Express Serial Card w/ Breakout Cable lets you add two RS232 serial ports using a single PCIe expansion slot. With the included break-out cable, you can easily add two ports to a single low profile slot.The PCIe serial card features a native single-chip design that provides optimum reliability and speed, reducing the CPU load by up to 48% over conventional bridge-chip serial cards - a cost-effective solution for connecting legacy serial devices to PCIe enabled computers.The multiport PCIe Serial Adapter includes both full and low-profile/half-height brackets for compatibility with standard and small form factor computers, and is compatible with a broad range of operating systems, including Windows 7/Server 2008 R2, 2003/Vista/XP (32 and 64 bit), Linux Kernel 2.6.11 and up, as well as MAC OS 10.5 and above.This product is a replacement for our PEX2S552B card.Backed by a StarTech.com lifetime warranty and free lifetime technical support.

StarTech.com 8 Port Native PCI Express RS232 Serial Adapter Card with 16950 UART

PCI Express - 8 x DB-9 Male RS-232 Serial Via Cable - Plug-in Card

Quick Info Web ID: 1013140846 Mfr. Part: PEX8S952
This PCI Express based serial adapter card allows you to turn a PCI Express slot into eight RS232 (DB9) serial connections. The adapter card is based on a native single chip design, that allows you to harness the full capability of PCI Express (PCIe) - providing optimum reliability and speed, and reducing the load applied to the cpu by as much as 48% over conventional serial cards. The RS232 Serial Adapter Card is compatible with a broad range of operating systems, including Windows 2000/XP/2003/Vista, Linux Kernel 2.6.11 and up, as well as MAC OS 10.4 and above.

StarTech.com 4 Port Native PCI Express RS232 Serial Adapter Card with 16950 UART

PCI Express - 4 x DB-9 Male RS-232 Serial Via Cable - Plug-in Card

Quick Info Web ID: 1013140847 Mfr. Part: PEX4S952
This PCI Express serial adapter card allows you to turn a PCI Express slot into 4 RS-232 (DB9) serial connections. The adapter card is based on a native single chip design, that allows you to harness the full capability of PCI Express (PCIe) - providing optimum reliability and speed, and reducing the load applied to the CPU by as much as 48% over conventional serial cards. The RS232 Serial Adapter Card is compatible with a broad range of operating systems, including Windows 2000/XP/2003/Vista, Linux Kernel 2.6.11 and up, as well as Mac OS 10.4 and above. Plus, the adapter card includes an optional low profile/half-height bracket that allows the card to be installed in virtually any computer case - making it that much easier to add serial ports to a PCI Express enabled computer, regardless of the size of the computer case.

StarTech.com 4 Port Native ExpressCard RS232 Serial Adapter Card with 16C950 UART

ExpressCard/34 - 4 x DB-9 Male RS-232 Serial Via Cable - Plug-in Module

Quick Info Web ID: 1017465361 Mfr. Part: EC4S952
Control and communicate with up to 4 RS232 serial devices through your laptop ExpressCard slot. The StarTech.com EC4S952 4-Port ExpressCard-based Serial Card lets you add four RS232 serial ports to your laptop or ExpressCard equipped desktop computer, using an available ExpressCard slot. The ExpressCard Serial adapter is designed based on a single-chip architecture (as opposed to cards that use a "bridge chip"), providing native PCI Express communication for greater performance and reliability, as well as reduced power consumption and CPU load reduction of up to 48%. Compatible with ExpressCard 34mm and ExpressCard 54mm card slots, the 4 Port Serial ExpressCard includes a slot spacer for greater stability while installed in 54mm slots. Backed by a StarTech.com 1 year warranty and free lifetime technical support.

Digi Edgeport/416 Multiport Serial Adapter

16 x DB-9 Male RS-232 Serial - Rack-mountable Hot-swappable - Type A 1.01m USB Cable

Quick Info Web ID: 10023111 Mfr. Part: 301-1000-10
Edgeport USB-to-Serial Converters offer an easy Plug-and-Play solution for instant COM port expansion. An out-of-the-box (external) alternative to PCI cards, the Edgeport connects to the USB port of a PC, thin client, notebook or server, eliminating the need to open the chassis, reconfigure and reboot.

StarTech.com 8 Port Low Profile PCI Express RS232 Serial Adapter Card w/ 161050 UART

PCI Express x1 - 8 x DB-9 Male RS-232 Serial Via Cable

Quick Info Web ID: 1024696413 Mfr. Part: PEX8S1052
Add 8 RS-232 serial ports to your computer through a single low profile PCI Express slot. The PEX8S1052 8 Port Low Profile PCI Express RS232 Serial Adapter Card w/ 161050 UART lets you add 8 RS-232 serial ports to your computer through a single low profile PCI Express slot.Supporting data rates up to 460.8 Kbps, the PCI express serial port card offers a high performance 16C1050 UART and a large 256-Byte transit/receive FIFO buffer that work together to provide high-speed serial communication while reducing the overall load on the system CPU.Suitable for most standard computer chassis, the 8 port serial card offers a low profile/half-height design and includes an optional full-height bracket. The included break-out cable uses a single connector on the card to deliver 8 ports, avoiding crowded connections that can occur with fixed/static ports.Backed by a StarTech.com lifetime warranty and free lifetime technical support.

StarTech.com 8 Port PCI RS232 Serial Adapter Card High Speed 16950 cable included

8 x DB-25 Male RS-232 Serial - Full-length Plug-in Card - DB-25 Male 4ft Fan-out Cable

Quick Info Web ID: 10240382 Mfr. Part: PCI8S9503V
This high speed 16950 Serial PCI Card uses a 16 Byte buffer simultaneously in both transmit and receive channels, reducing the number of CPU interrupts while improving system performance._x000D_ The card lets you connect up to 8 RS-232 serial devices to the host computer, and can be installed in either a 3.3V or 5V PCI/PCI-X slot._x000D_ Ideally suited to industrial applications, the buffered Serial PCI card is compatible with a broad range of operating systems, including Windows, DOS, Linux, and Unix operating environments._x000D_ Backed by Lifetime Warranty.

StarTech.com 4 Port RS232 PCI Serial Card Adapter with Power Output

PCI-X - 4 x DB-9 Male RS-232 Serial - Plug-in Card

Quick Info Web ID: 1022377110 Mfr. Part: PCI4S954PW
Add 4 RS232 serial ports with 5V or 12V selectable power output to your computer, through a PCI slotThe PCI4S954PW 4-Port PCI Serial Card (with Power Output) turns a PCI slot into 4 RS232 (DB9) serial connections and enables compatible devices to draw power from the serial ports.Suitable for many RS232-powered serial applications, this PCI serial card offers a selectable 5V or 12V power option, capable of power output using pin 1, 4, 8 or 9, which enables you to configure the card to suit the requirements of your powered RS232 devices.A flexible solution for adding serial ports to full-sized, or small form factor systems, the 4-port serial card includes both low and full profile brackets while the included breakout cable helps to avoid cluttered connections.Backed by a StarTech.com Lifetime warranty and free lifetime technical support.

StarTech.com 4 Port PCI Express (PCIe) RS232 Serial Card w/ Power Output and ESD Protection

PCI Express x1 - 4 x DB-9 Male Serial Via Cable - Plug-in Card

Quick Info Web ID: 1025214757 Mfr. Part: PEX4S553S
Add four ESD-Protected RS232 ports, with 5V or 12V selectable power output through a PCI Express slot. The PEX4S553S 4-Port PCI Express Serial Card lets you add four ESD-Protected RS232 ports, with 5V or 12V selectable power output through a PCI Express slot. Ideal for industrial environments, this 4-port serial card offers built-in 15KV ESD-protection which helps prevent damage to connected devices in the event of line surges and electro-static discharge. Plus, for devices that require additional power, the multi-port serial card also has a jumper-selectable 5V or 12V power output option (pin 9) using either the PCIe bus, or through an SP4 connection to your power supply. For added flexibility, the power output can be enabled or disabled on a per-port basis so you choose which ports supply power. This versatile RS232 card supports high-speed serial data rates up to 921.6 Kbps, and is compatible with a broad range of operating systems. To maximize installation options, the 4-port card is equipped with a standard profile bracket and includes an optional low profile bracket for installation in small form factor computers. To avoid crowded connections that can occur with fixed/static ports, the card uses a break-out cable which turns a single connector on the card into four flexible RS232 serial ports. Backed by a StarTech.com lifetime warranty and free lifetime technical support.

StarTech.com 8 Port PCIe RS232/422/485 Serial Card- 4x RS232 4x RS422/RS485

PCI Express x1 - 8 x DB-9 Male RS-232/422/485 Serial Via Cable - Plug-in Card

Quick Info Web ID: 1025484920 Mfr. Part: PEX8S232485
Add four RS232 and four RS422/485 serial ports to your standard or low profile system through a PCIe slot. The PEX8S232485 8-Port PCIe Serial Combo Card lets you add four RS232 and four RS422 / RS485 serial ports to your PC through a single PCI Express expansion slot. This multi-port serial card is a single card solution that offers compatibility with nearly any serial communication protocol, supporting RS-232, RS-422, RS-485 2-wire or RS-485 4-wire operating modes at data rates up to 460Kbps. To fit most standard computer cases, the card ships with a standard profile bracket installed and includes a low-profile / half-height bracket for adapting to slimline or small form factor systems. Plus, the included breakout cable helps to avoid cluttered connections. Backed by a StarTech.com lifetime warranty and free lifetime technical support.

SIIG JJ-P04621-S7 4-port Multiport Serial Adapter

PCI - 4 x DB-9 RS-232 Serial Via Cable - Plug-in Card

Quick Info Web ID: 1018400132 Mfr. Part: JJ-P04621-S7
SIIG's DP Quartet Serial 550 PCI is an excellent solution designed to add four additional 9-pin RS232 serial ports for connecting multiple serial-based devices to your PCI-enabled desktop computer. This 4-port serial adapter card comes with four high-speed 16550 UART serial ports supporting data transfer rate of up to 230Kb/s. The serial ports can work as either standard RS232 ports, or can be independently configured as 5V /12V power outputs for devices that require power such as handheld scanners, table scanners, and POS displays. The DP Quartet Serial 550 PCI features IRQ sharing to reduce IRQ conflicts, built-in 32-byte FIFO buffers to dramatically increase data transmit/receive speed especially under Windows multitasking environment, and PME (Power Management Event) that allows device to request a change in system power state (wake up system). It features dual-profile design to work in standard-height and low-profile chassis with the included brackets, and Universal PCI car

Digi Neo 8 Port Multiport Serial Adapter

PCI Express - 8 x RS-232 Serial Via Cable - Plug-in Card

Quick Info Web ID: 1011262956 Mfr. Part: 77000889
Digi Neo PCI Express multiport serial card leverage an Application Specific Integrated Circuit (ASIC) to provide throughput speeds exceeding 460.8 Kbps, large buffers for data transfer, low latency and baud rate customization.


The data and images on this website have been subjected to numerous control mechanisms to ensure its' accuracy. FrontierPC.com will use best efforts to maintain its accuracy. However, if at any time the data or images provided are incorrectly priced or below fair market value or availability has substantially changed or image or descriptions contain inaccuracies, FrontierPC.com shall not be held responsible or liable, furthermore FrontierPC.com reserves the right to reject any orders placed based on this erroneous information. Copyright 2001-2015 FrontierPC.com Computer Inc., Frontier PC Canada, Frontier Computer, Toronto, Vancouver, Calgary, Halifax. All Rights Reserved.