RS-232 Extender over CAT 5e cable
    Product # 3598
    RS-232 Extender over CAT 5e cable
    Product # 3598
    In Stock This item should ship tomorrow (10/26/2016) if ordered within 20 hours 29 minutes

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    RS-232 Extender over CAT 5e cable

    Extend the range of your serial RS-232 control interface with the convenience of standard Cat 5e cables.

    Compatible with all RS-232 protocols.

    • Full-duplex data communication.
    • Sends RS-232 data at 230 kbps up to 1000M / 3300 ft.
    • Pure hardware solution - real time data transfer, no software conflicts.
    • Transfer data or files between PCs, equipments.
    • One CAT-5 cable extension.

      Package Contents
    • RS232 Extender Local Unit
    • RS232 Extender Remote Unit
    • 1 user manual
    • 2 power adapter DC 9V/300mA
    • 1 20cm Null Modem cable (DB-9 Male to Male)

      *Monoprice continually strives to improve its product line to bring our customers the best products available. Therefore, changes may be made to listed specifications without prior notice. Item received may not match photo or specs shown.

    Support Files:

    • RS232 Connector: DB-9 Female x1
    • RJ-45 Connector: 1
    • Cable Distance (Max.): 1000M / 3300ft (UTP)
    • Communication mode: Full-duplex data
    • Power Supply: DC9V/300mA (Min.) spare
    • Housing: Metal
    • Dimensions (LxWxH) mm: 92x34x22

      *Monoprice continually strives to improve its product line to bring our customers the best products available. Therefore, changes may be made to listed specifications without prior notice. Item received may not match photo or specs shown.

    6 Reviews

    81.67% of the reviewers recommend this product


    EXACTLY What I needed

    • Brandon Eldridge,
    •  Richview, IL 
    • 7/4/2015 10:27:06 PM

    Pros: Cost Effective, Small Size for tight spaces

    Cons: Manual leaves a much to be desired, but the web is a GREAT resource for these oddball things days. Needs to come with some GENDER CHANGES just in case! I needed them (and ordered them but they didn't arrive) and had to MAKE them with what I had. I also wish it had a little green light on it just to let you know it was ON. There's no way to know it's working!

    My task was to get an old Feed Grinder's COM/Serial/DB9 PORT on a hog farm to once again communicate with a computer in the farm's office more than 400 feet away. Previously, a old baud modem was used via phone line run in buried conduit, but that stopped working. Initially, I tried a tiny dell optiplex (with a COM PORT in the back) and wireless internet blasted the distance (and rerouted). It was NOT reliable and the heat was too much on the tiny Dell in a FG Cabinet.

    So, I pulled the PC out once I found a StarTech RS-232 "SERIAL TO IP" Device Server. I thought this would solve all my problems. I tied Cat5e to that buried phone line and pulled it through. Crimped the ends and thought all was well, but it didn't work. In my haste, I didn't learn that the upper limit of ethernet data was 100m. The computer / router simply couldn't communicate with the FG. It was too far away.

    As I was researching options to fix this, POE Injectors, ethernet extenders (would have to be installed somewhere in the middle if I dug it all up), or even Coax Cable/Phone Line solutions, I found this RS232 Extender. Exactly what I needed the WHOLE DARN TIME. Since it is not sending internet protocol, just the COM Data via a powered extender, it can go thousands of feet.

    However, it did not work right off the bat. I don't know why either. It was odd. The FG Program simply wasn't seeing the device. (Though the Ethernet Cable tested fine). I tried this and that. I made sure the Device was mapped correctly (to COM1 via Device Manager and that the Program was searching COM1).

    Ultimately, I did two things. Either one, or a combination of both, made it work. I slowed down the transmit and receive buffer one "click" each. I also opened up a port on Windows Firewall. I didn't realize it would ever use an actual port, but it was worth a shot! The port in question was 4660. Maybe that did nothing, and I'm stupid. Maybe it was exactly what I needed. Regardless, after 3 months and $500, this project is completed. IT WORKS! And, with TeamViewer or another Remote Desktop Application, this Feed Grinder can now be operated from anywhere in the world. And for that, I thank you!

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    Didn't work for me

    • Papa,
    •  Kennewick, WA 
    • 1/31/2015 9:50:04 PM

    Pros: Small - would be perfect for many of my needs - if it in fact worked.

    Failed to communicate with my device. I tried multiple configurations with no luck. Not the first such device I have used. Higher priced unit still in place on a phone system we installed to program remotely. I will do more testing at a later date, in the meanwhile we rewired with a standard DB9 50 foot cable, and communicated perfectly first try.

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    It works great

    • Epic Audio,
    •  naples, FL 
    • 4/8/2013 11:23:34 AM

    Pros: simple and reliable. buy it!

    It did a great job with no surprises

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    RS232 extender

    • Paul,
    •  La Mirada, CA 
    • 1/4/2011 8:44:38 AM

    Pros: Works as advertized. A perfect way to extend the communication distance.

    Cons: I wish it came with two gender change cables or connectors

    Very happy with the product

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    Works, but be careful

    • Sean,
    •  East Syracuse, NY 
    • 6/17/2009 9:22:47 AM

    You should test before installing - I've found that sometimes power isn't necessary on the local end, but only on short (100ft) runs. More importantly, if you aren't sending true RS-232 - for example, using an Extron device - you need to build a custom DB9 shell for the local extender and short out pins 6 and 7 to complete handshaking. Documentation is very weak you're literally using 2 black boxes here. Otherwise this is a good product, and significantly cheaper than other extenders.

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