CONVUSB485 – USB to RS485 Converter Cable
The Laumas CONVUSB485 is a USB 2.0 full-speed to RS485 converter cable, 180 cm (70.9 in) long, with a Type-A USB connector on one end and stripped/tinned wires for direct terminal board connection on the other. Data transfer rate spans 300 bit/s to 300 Mbit/s, with operating temperatures from −40°C to +85°C (−40°F to +185°F). The PC recognises it as a virtual serial port.
PRODUCT DETAILS
The CONVUSB485 is a USB-to-RS485 converter cable designed for connecting RS 485 weighing instruments directly to a PC’s USB port. It is the standard interface cable used in PC-based tools for instrument configuration, calibration, monitoring, and parameter management.
The cable is 180 cm (70.9 in) long, with a standard Type-A USB connector at the PC end and individual stripped and tinned wires at the instrument end for direct connection to the RS485 terminal board — no additional connector or adapter is required. The host PC recognises the CONVUSB485 as a virtual COM port (VCP) using FTDI drivers downloadable from This is a link, compatible with all versions of Windows, macOS, and Linux. For software developers, a DLL library is also available for integration into custom application software. Automatic receive/transmission selection (RS485 half duplex) eliminates manual switching, and two LEDs indicate active reception and transmission status. The cable is powered directly from the USB bus with a maximum current draw of 250 mA.
Most Common Applications: PC connection for instrument configuration and calibration, RS485 device data logging and monitoring from a laptop or desktop, multi-instrument network diagnostics, field service and commissioning of RS485 weighing systems.
| Compatible Hardware | RS 485 serial ports of indicators, transmitters |
|---|---|
| Platform | – |
| License | – |
| Channels | Single |
| Communication Interface | RS 485 to USB |
| Key Functions | Serial cable converter |
| Printer Option | – |
| System Requirements | – |
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What our clients say
We have just shipped the product to the field. I really liked the load cell while I was testing it in the shop. I plan to use more of them in the future.
What also was very pleasing is your quick responses when I had questions and concerns. It was a big issue with the previous load cell suppliers where they would take many days/weeks to respond.
Thank you so much. I am excited about working with you guys more.
Andrew Slaght
Berminghammer Foundation Equipment
The wireless tension link has been great. The quality is high-end, and we have had a positive experience using the product.
Zokhir Sabzaliev
Marine Gate Service
We are very happy with every aspect of your product!
We will reach out to you again for future projects.
Brett Molchan
Eascan Automation Inc
So far, all is great.
Chris Cass
Berass Services Inc.
Very good load cell. Intuitive and easy to transport.
Jeff Bognar
JA Grant and Sons
We are very satisfied with the wireless load shackles with remote display. We bought 1 and was so happy with its performance we bought 3 more. Very good tech support also.
Keith Dayton
Church and Dwight Company Inc.
We are very satisfied with set a 2 load cell 100K lb capacity to monitor load raised by any kind of hoist and crane for my employer Fabmec. Greatly recommend them for any load instrument device.
Alexandre Belley
Fabmec
We are a company based in Spain and we are very happy with customer service and quality of the products acquired. No doubt we will contact them again.
Silvia Moreno
Tefor Exportaciones S.L.
We are very satisfied with the axle pad scale system, it is exactly what we were looking for. Simple, reliable and precise. With the automatic printing ticket, it was easy for the employee to use it without error.
Technical support by Clint is top notch! Overall excellent product!
Mathieu Sauvé
Ferme Sauvé Inc.
NBSCIA purchased a four piece set of Ultraslim LCD to allow two axle weighing. Staff could transport the Ultraslims in their personal vehicles.
Units were easy to level and the digital key pad was easy to read, even in sunlight.
NBSCIA found the scales to be accurate compared to harvest yield monitors and highway scales.
For NBSCIA's purpose to check crop yield and estimate tones of manure applied and fertilizer application on test plots the Ultraslim LCD proved to be the best choice.
Ray Carmichael
New Brunswick Soil & Crop Improvement Asn
The Truck Scale worked really well. It was way easier to get harvest done without running everywhere to get stuff weighed. It was right on with the weights at the elevator, so really nice. We should be finishing harvest today, and after that we’ll have about 15,000 bushels to dry yet and call it a year.
Kevin Chevalier
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Overall experience was good. Easy to set up and measure, good data repeatability. Though, it was heavy and we needed to use forklift to maneuver scale.
Ailyn Ramilo
K-Hart Industries
The Massload Scale Pads were an economical and convenient solution to providing a weigh slip for the vehicles leaving our facility. Clint was amazing to work with and provided all the information we needed in advance as well as support after the instillation. The pads work without fail and it's saving our service thousands of dollars.
Stephanie Fulginiti
Comox Valley Regional District
I wanted to pass on a thank-you from my customer EMS-Tech. Specifically to Marc but also to the others at Massload that were involved but I didn't deal with directly.
Last fall EMS-Tech bought a pair of custom ML-700s to measure cable tension for the winches that manipulate the loading spout at a grain terminal.
All was going well until about 5 weeks ago, when an operator at the terminal bypassed the safety mechanism, overloaded and broke the tension link as well as some other equipment. EMS-Tech has been under a lot of pressure from their customer to put the grain terminal back into service ASAP.
Marc & Massload made every effort to ensure that the custom ML-700 was delivered on time as promised.
Originally, the ML-700 was to be shipped via UPS Express but when Marc found out that UPS could not guarantee delivery, he hand delivered the equipment to Fedex. This saved at least two days and provided the time needed to configure & calibrate the electronics before handing the equipment over to EMS-Tech for installation and commissioning.
Ian Claudi
JEB Controls
I’ve always had a positive experience with Clint. I get a quick reply when asking for a quote for load cell and the goods get delivered fast.
Thank you!
Pierrette Mignault
Atlantic Power Ltd Partnership
Great customer service and lead times! Totally recommended and would buy again if we need to!
Adriana Rodriguez
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Great fast service. Fast response to questions. Happy customer.
Trevor Cunning
Starhill Farms Ltd
Great sales and tech staff here. They rebuilt our tonner scale quicker and cheaper than quoted. We will definitely be back.
Jason Lagacy
City of Saskatoon
Aftersales service very excellent, support very fast and responsive. Thanks!
Heru Djulianto
DT Techsolutions
Cost effective, simple to set up product.
Excellent support during setup when we tried to set things up different than recommended and needed the details explained so we understood everything that was going on with all the cells so that we would get good readings even though we set it up differently than recommended.
Alex Siemens
6. August, 2025.
After a few emails and calls to other similar companies went ignored, Massload was very quick to get me a quote and get a system ready.
They worked within my budget and helped me get a system for the farm that was a good match for our needs.
They even accommodated an out of hours pick up time due to my schedule issues to get the system.
The system worked flawlessly out of the box and we are very happy with the service. They will be our first call when we grow into a bigger system.
Adam Giesbrecht
Giesbrecht Grain Farms
I Dealt with Ryan and received the excellent service. Thank you!
Alex Sokolsky
Superior Scales
I have been using Massload Technologies for the past 10 years and I must say that I have always received exceptional support and guidance from the Massload team.
Kirk Thomas
Non Destructive Testers Limited
Best Reliable and Quality service.
Sunny Kals
6. August, 2025.
Clint went over and above to help us diagnose the issue with our load cells indicator and provide us with a replacement over the weekend.
Always had good experience dealing with them.
Parmjot Singh
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We needed a tension link to do some load testing in a couple days notice. Massload was able to deliver and were quick to respond and answer any questions we had.
Calvin Drayton
Croatia Industries
I've worked with Massload for over 15 years, selling their products mainly here in the USA. The support is always top-notch, and deliveries have always been on time. A big thank you to the entire Massload team.
Joe Hance
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Great experience with Ryan at Massload. Their whole technician staff was very helpful! Totally recommend!
Chris Mann
Rio Tinto
Wonderful buying experience with lots of help in choosing which load cell to go with. My 50,000lb wireless tension link has worked flawlessly for over a year and the price was cheaper than anywhere else I looked.
Joshua Acosta
Pepe's Towing Service
Massload is a great business partner. They are prompt and professional.
Jeff Beardsley
Crane Warning Systems Atlanta
We’ve had the Axle Pad Scale for more than 6 years now. We recently upgraded to the wireless version.
It’s seems to work great and during the upgrade the technical support was excellent.
Jarno De Ruiter-Kruize
De Ruiter-Kruize Farm
It was a pleasure to work with Clint on my order. Always very quick to reply and extremely polite.
Roman Kobets
Reaction Dynamics
Clint was very helpfull. Were able to find drawings on an old truck scale for me, even though they haven't been making them for years.
Quinten Ron
6. August, 2025.
We purchased a set of axle pads several years ago and they are very accurate and convenient. When one of the load cells failed, ( I suspect operator abuse, truck slamming on the brakes) Ryan in tech support was amazingly patient, professional and helpful in the diagnostic process. He went above and beyond to help us get the problem resolved.
Our scale was up and running very quickly and is a very useful tool on our farm again.
*Just a side note, the more picky you are regarding the ground work under and ramps leading on and off the pads the more accurate they’ll be. We put a concrete pad underneath them and a level approach and departure ramp for weighing super B’s and are within 10-40 kg consistently of all the other certified scales in our area.
Peter Winter
Kuhn Farms
Top notch support. Always available to help out. I am repeat customer and highly recommend them.
Michael Waldhauser
Discover Books
Excellent product, scales work perfectly! Clint was great to deal with, very knowledgeable and followed up on our install! Great product!
Barry Whitledge
Whitledge Bros Farm LLC
Very good experience of wokring with Massload. We are a Taiwan company and have purchased LCD wheel scales. From inquiry, purchase, shipping, to after service, Massload Team has been proactive and giving prompt responses. The scales are also good and meeting our expectations.
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