- StarTech USB to Serial Adapter, 2-Port, DB9, FTDI, TAA (ICUSB2322I) | Wall Mount, Din Rail Clips, Industrial, COM Port Retention

Tried many cheap USB to RS-232 converters, what a waste of money and time trying to get them to work properly; nothing but communication errors and frustration. This one works flawlessly in Windows 7, 8.1 and 10; drivers installed automatically (no disk needed) and COM ports are persistent (never change) between multiple devices; it looks like the driver always remembers a serial number (or somehow is able to identify a specific unit) of the device and assigns it the same COM port every time this specific device is plugged in. Used 3 of those converters on the same computer without any problems whatsoever. Has an external 5V input port (I think it is a standard 2.5mm plug) but I did not need to use it; it works flawlessly getting it's power only from the USB port. The case is solid steel and comes with a DIN rail adapter as well as it can be surface mounted with screws. Love the send and receive indicator lights (for each port) since I can visually identify what is happening with either serial port. Also has a power LED. I cannot say anything about it's high speed serial performance since my application calls for only 38.4kbs and it has been running without a single error for months now. At this speed, basically saturating both ports with data traffic, it is just slightly above the ambient temperature (cannot really call it warm). As for reliability goes, I have been using approx. 15 of those converters for several months (purchased from different sources including Amazon), not a single DOA or failure. A true industrial quality USB to serial port converter that is very reasonably priced.

This is the greatest! What an amazing device. I have fought with various adapters for years and they are always causing problems, especially when you add a new device. This box works perfectly and replaces all those irritating adapters. I have a weather station, 2 ham radios, and a communications device all plugged in and they can all be used at the same time. No issues with port numbers or anything like that. Plus, eliminating the serial/usb adapters freed up the usb ports on my PC that they were using. In addition, all the serial cables go to this box which can be located out of the way, reducing cable clutter at my PC. This is a terrific adapter hub and I highly recommend it to anyone who uses more than one serial/usb adapter.

The Startech ICUSB2324I 4-port USB to serial adapter is an excellent product! The FTDI USB to serial port chips are very stable. Sturdy steel case. LEDs for each channel indicate port activity, which is handy for diagnostic purposes. And it is powered via USB port from computer, with option for external 5 Vdc power if needed. Would purchase again, and highly recommend. Also available in 2-port and 8-port versions for different size applications.

Had been using Tripp Lite Keyspan serial to USB adapters in my astronomical observatory. They are good, but not good enough for a few key pieces of imaging equipment. Not the fault of Keyspan. I had one fail, and decided I needed a more dedicated way of adapting serial devices. This worked perfectly! I run it remotely through an Icron USB extender (LAN) several hundred feet to the house. My equipment specifically stated I should use a dedicated "card" but running a laptop made that impossible. So I got this and it solved all my connectivity issues. And I run it with no external power source.

I used this to successfully connect 8 RS-232 temperature controllers to a single USB port. I am reading at .5 second intervals and it works well. The weird thing is that the port mapping was not sequential to the port numbering on the box. It was a hit and miss thing. I had to start up polling on a single port and move the device connection to the different ports to find which one was active. And for some reason, it even skipped over to unused port numbers. So, I had ports 1 - 6 mapped to Com 8 - Com 13 and then 7 and 8 mapped to Com 15 and 16. Com 1 - 6 did not map to 8 and 13 in that order either. port 1 was connected to com 10 and some random order. I did order a second one for another system so it should show you that the mapping was not a primary concern and once I figured it out, it should never have to be redone. I unplugged and replugged several times and the port mapping remained in tack.

I’ve used these for years and the are well made and durable.

Muy practico, se integra automáticamente y funciona a la perfección.

As an amateur radio operator, this device is a must have for running ham radio software. I have purchased two of these. One for windows 7 and another for windows 10. Both were extremely easy to install on both computers. Window 7 Home premium machine is a Dell Inspiron 1750; the other is a Dell XPS tower running win 10 Pro. These devices use the ultra reliable FTDI chipset and will retain port assignments across reboots. I can confirm these devices will work and work well with "Ham Radio Deluxe" software.

Funktioniert einwandfrei. Portkennzeichnung stimmt mit -belegung überein. Der horizontale Abstand zwischen den RS-232 Schnittstellen könnte 1-2 mm größer sein, damit auch Kabel mit guter Schirmung nebeneinander Platz haben

We have been using it to mass install the firmware in our circuit boards. It happened that one of our cable broke and shorted the RTS,CTS and some data outputs to GND for quite a few hours and it did not cause any damage to this RS232 adapter. This thing is bulletproof.

ok RAS

Hab heute den StarTech ICUSB2324I bekommen, in den Mac mit OSX 10.12 eingesteckt und er ging sofort. Keine Treiberinstallation. Liegt wohl am verwendeten FTDI-Chip. Für FTDI gibt es mMn die beste Unterstützung für viele Betriebssysteme. Entgegen der Aussage eines anderen Rezensenten gibt es sehr wohl einen Treiber für Win10 (einfach beim Hersteller nachschauen). Wenn ich ganz pingelig bin, dann könnte ich mich darüber aufregen, dass der auf dem Gehäuse beschritete Port (Port 1 ... 4) als /dev/cu.usbserial-FT0IF76PA...D erscheint. Reg mich aber nicht auf, da ich sowohl das Alphabet kann, als auch zählen kann. :-) Ich werde auch welche für die Arbeit anschaffen (ich mach Entwicklung für Embedded Systeme, bei denen viel über RS232 geht). Also, eine klare Kaufempfehlung auch wenn es billigere gibt.

StarTech manufactures two versions of this product - one with 4 ports, another with 8 ports. Both function perfectly as designed. They are a great way to connect your computer to multiple devices at the same time, each of which requires an RS232 serial connection. On your computer each serial COM port can be configured independently, and all COM ports will appear to function simultaneously. Highly recommended.