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Your cart is empty. DTECH USB RS485 adapter cable devices with FTDI chipset allows you to connect RS422 or RS485 serial devices to your computer via USB.
By taking advantage of the USB bus, the USB/RS485 Serial converter makes it easier than ever to add RS-422 / RS-485 serial ports and serial devices to your system.
DTECH Industrial USB to RS 422 / 485 Serial Adaptor Cord is a high quality industrial USB plug and play dongle designed to instantly add a RS485/RS422 port to your PC or Mac system via USB interface. USB to Serial cable RS485 is the ideal solution for connecting industrial devices such as laboratory testing and measuring equipment, monitoring devices, material handling equipment, and many more devices where mission critical applications are required.
Specific
RS422/RS485 TIA/EIA Standard
USB2.0; compatible USB 1.1
Baud rate: 300bps to 921Kbps
Indication LED's for Power, TX and RX
No IRQs, DMA or required; No IRQ Conflicts
Automatic send data control. Auto detection of data speed; Zero delay automatic transmission
Automatic hand-shaking protocol supported
Built-in static and surge protection up to 600W; 15KV ESD protection (Electro-Static discharge)
Serial to USB adapter supports multiple terminals up to 32 RS-485 or RS-422 devices
up to 1200 meters for RS-485/422 end
Working modes: asynchronous; point-to-point or point-to-multipoint; 2-line half duplex and 4-line full duplex.
Application fields: Factory automation system, Distributed control system, Other 485/422 serial device wireless network, LED INFO display equipments, PLC control and management, SCADA, measuring instruments and monitoring system, CNC management, Medical treatment/medication automation, Building automation, Check on work attendance/ Human resource management.
Original Packing Included
1 x DTECH USB to RS-422 RS-485 Adapter Cable 4ft
Terminal Board
1 x CD software driver
Joe O'Brien
2025-08-29 11:37:45
I got this particular maker since it was rated as being very compatible. And after waiting a few minutes for Windows 11 to correctly load up all the drivers for Com3 to appear; it does indeed work without fail. Nice clean signaling and now works without fail. Sure, I may make a mistake; but at least I don't have to worry about the communication.
crazytekkie
2025-08-03 12:31:16
Even without installing the included drivers on disk, this device was detected by my computer, drivers installed and worked perfect immediately. Love the fact it has a long USB cord attached so I don't have to worry about stresses from a device getting bumped at my port. Also love the fact this unit has both screw down terminals as well as a DB9 connector, adding to its versatility. The com lights on it to let me know anything is happening are nice and bright too. Couldn't really ask for more in an adapter of this kind.
Great tank, easy too use
2025-06-05 14:47:45
I used this to connect to a vision scanner at work. The manufacture sold a cable that was around $300. So I figured I’d give this a shot. Very easy to connect and good instructions. Only quality issue I noticed was the circuit board is exposed. So, using this in the elements may be a problem. I personally keep this in my office and only bring it out when I need it.
Michael W.
2025-06-03 14:18:43
I used this product to interface with a Spectrum (Omneon) video server over VDCP/Louth (RS-422 full duplex) without issue. The unit was easy to setup (install drivers from the included CD, connect the cable), and the pin-out is straightforward. The top 5 pins (left-to-right) are Ground, RX-, RX+, Tx-, TX+. I would definitely buy another.
Jacob L. Shoemaker
2025-05-08 11:28:55
Product works exactly as described.
Alex C
2025-05-07 19:43:00
Used for RS-485 with the included db9 breakout board. The tx/rx lights are a little tricky - don't look obliquely.
John Tsouris
2025-04-30 14:28:12
This device appears to only transmit using the RS485 protocol, not receive, by design. You cannot use it to receive transmitted RS485 from a controller to view the output from the controller on a PC screen. If I'm wrong, then my unit is defective.
Customer
2025-04-02 21:58:20
Product was exactly what I needed
FutureMan
2025-01-27 11:41:42
I’m using rs422 to connect to a very old legacy system. The other comments where people say this doesn’t work are wrong. It’s their lack of understanding how computers and electronics work.Firstly, the driver is ftdi. By default this should work plug and play with windows 10+ and Linux. If it doesn’t, just download the correct ftdi driver for your operating system.Second, people saying the signal is too weak and such… ugh, it’s because they don’t have the gnd connected. I get it, the schematics don’t display a common gnd, so people don’t bother. But you need a common gnd on all electronics. It’s how each device can reference voltage! The schematics didn’t display it because it’s common sense.
Ravi
2025-01-09 16:58:32
Feel cheated , overpriced , cable lentht is not 4 feet.price not worth
Ward
2025-01-04 14:19:54
Works very well. The lights are a nice touch. I only used the two data pins. Even with ground not used this works perfectly on my mill. Runs both a VFD and a Pendant using Modbus.
x
2024-12-13 16:09:09
Sweet and simple. Works fine, well made.The red LED is a little too bright,
swalford
2024-11-13 11:04:13
Good quality and reasonably well-built, though there is no built-in termination resistor. Add a 120-ohm termination resistor across the + and - lines if using this for RS-485. Worked well on Linux (Raspberry Pi) as FTDI drivers are installed by default, but was slightly more difficult on Windows. Windows 7 attempted to use pre-existing serial drivers (which did not support RS-485) instead of using those on the install disk. One of these drivers had to be uninstalled for Windows 7 to recognise and use the FTDI drivers on the disk.
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