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StarTech.com 2S1P Native PCI Express Parallel Serial Combo Card with 16550 UART Model PEX2S5531P

Ships from United States. Most customers receive within 4-10 days.

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  • Add 1 parallel port and 2 RS-232 serial ports to your standard or low-profile computer through a PCI Express expansion slot
  • PCi Express Serial Parallel Card
  • PCI Express Serial Card
  • PCI Express Parallel Card
  • PCIe Serial Parallel
  • PCI Express RS232
  • Dual Profile PCIe Card
  • Native single-Chip
  • single lane PCI Express

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews
  • newegg Add Serial & Parallel Ports to PC Based on a native single-chip, high performance 16550 UART design, the StarTech PEX2S5531P card adds two serial ports and one Parallel port to your PCI Express equipped computer for easy connection to various peripherals.
  • newegg Low/Full Profile Brackets Included Standard and low profile/half-height brackets are included to ensure fitment in any system.

Learn more about the STARTECH PEX2S5531P

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
Ownership: 1 month to 1 year
Verified Owner
5/ 5
DELL OptiPlex will not play well with this card

Pros: 2 Serial Ports w/ Parallel port for Single PCIe 1x

Cons: Does not work with Dell OptiPlex 3020. No reduction in Eggs as I attribute the issue more to DELL and a learning experience for myself. This card will installed and operated as you would expect., but only for a period of time and then the communication would stop / idle.

Overall Review: For Dell Optiplex 3020 Systems use the STARTECH PEX1S1P952 (contains the PLX/Oxford - OXPCIe952 chipset) as this work for my needs.

Purchased this Serial devices for some Truck Stop Weight Scale (Fairbanks 9406 series) with continuous Serial Communication.

Requirements for successful communication:
- Disable all Power Saving Settings in BIOS
- Disable all onboard CommPorts in BIOS
- Disable all Windows Power Options Features, Specifically:
-- PCIe Link State Power Management - OFF
-- USB selective suspending Setting - DISABLE

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Ownership: 1 week to 1 month
Verified Owner
3/ 5

Pros: Nice card with two serial ports and a parallel port - great for modems, legacy hardware, and hobbyist projects.
Can supply 0, 5, or 12V on pin 9 of the serial ports (each can be set separately.
One serial port and the parallel port are on ribbon cables and can go into a cutout or a low-profile case.

Cons: Bad drivers - regularly caused bluescreens on Windows 8 64-bit.

Overall Review: Installed in a Dell XPS 8500. As soon as I installed the drivers, it would bluescreen with PAGE_FAULT_IN_NONPAGED_AREA (StnSport.sys) with the 2.0.1 and 2.0.2 drivers (then gets into a reboot-bluescreen loop), and would drop off after a short while with the 1.0 drivers on the CD. Startech said it may be incompatible with my chipset and recommended switching to the PEX1S1P952 instead.

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Ownership: 1 month to 1 year
1/ 5
Fails daily

Pros: Easy to setup, all config options are available within device manager.

Cons: I have more than 10 of these in my lab, and they are all seem to work at first, yet many fail after time. The com ports just stop responding and require a reboot of the OS to get them working again.

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Ownership: 1 day to 1 week
Verified Owner
5/ 5
Worked well

Pros: Plugged it into a Win7 64bit machine, turned it on and it installed itself. No config or drivers needed. Hooked up the devices, set the device configurations and we were off and running.

Cons: none

Overall Review: A pleasant surprise.

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Ownership: 1 day to 1 week
Verified Owner
4/ 5
It works, but ...

Pros: It can be made to work, that's good. Mine was on Win7 64 bits, and serial and parallel are working (now). Card has a power connector, but is only for providing power to a RS-232 device. If no such need, then no connection at the power connector is necessary.

Cons: But its a mess. Drivers on CD failed, at least in my Win7 64. Tech support was helpful and said to download newer drivers. Installing them at Device Manager worked OK, and Device Manager was happy. Serial worked, but parallel did not work.

The parallel ribbon cable to connector on second panel is clearly marked red on the edge, for pin 1. The card connector is not marked. The socket is not keyed. The manual makes no mention of its orientation. The front of the manual on the web site had a color picture, which clearly showed the cable red edge towards the rear panel,, so that the cable dressed cleanly over the top of the card. This is opposite direction to the installed serial cable, and seemed suspect, but I asked tech support, and he said, sure, like the picture. So I tried it. Parallel does not work.

A closer exam thinks maybe the tiny pins on the soldered rear side has one square pad, and the rest are round. Assuming that is marking pin 1, I turned the ribbon connector around, so the red cable edge is on it, toward the power connector, toward the front of the computer. This dressed the cable awkwardly down, instead up to go over the top the card... but it works!

Card seems fine now, everything is working, and I assume it will be fine. I want to rate it a disgruntled 2, but will give it a 4. I guess the card is not to blame for the documentation. But it certainly seems crummy installation documentation.

FWIW, a SIIG Firewire card ordered same time installed itself unassisted (via Win7), and worked great first time. A real pleasure.

Did you find this review helpful?
5/ 5
Great Product

Comments: I've had these communicate with serial port equipment that the add-ons that come with newer main boards would not.
They've been used on both Win7 and XP.

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