USB to RS232, RS485, RS422


Model: MWE820B
Add to Cart:

This industrial grade USB to RS485 / RS422 is an alternative to our part number U485G. The main difference between the two converters is that this converter also has a RS232 port in addition to the RS485 and RS422 ports. All 3 serial ports can be used at the same time for simultaneous data transfers.
Another difference is that this converter has a different style housing and a detachable screw terminal header which makes it very easy to disconnect the data wires quickly. The U485G has a built-in terminal resistor whereas this converter does not, (the resistor is usually only needed for very long range communication).

A built-in DIN clip on the backside of the converter makes it easy to install it on standard DIN rails, but the converter can also be mounted with screws. Another nice feature is that this converter is stackable, you can actually stack as many units on top of each other as you want. This will save you valuable DIN or rack space.

The converter is powered from the USB port so no external power supply is required.
Indication LED lights identifies when data is present (TX and RX) and when power is applied to the converter. The data LED lights is a great help when troubleshooting to determine if data is being sent or received.

Optical isolation of up to 3500 volts is achieved by high speed 6N137 isolation opto-couplers from Fairchild Semiconductors, this will protect your data, equipment and the converter itself against most types of static electricity, surges and high voltage spikes, which often can occur in industrial installations.

This USB to serial RS232, RS485, RS422 converter is designed with the CP2102 processor chip from Silicon Labs which is a top-shelf high performance processor that will ensure reliable and fast data transfers for many years.

Overall features
  • Fully optical isolated
  • Detachable terminal header
  • USB port-powered
  • Industrial grade design
  • DIN mountable
  • Stackable
  • Compatible with most operating systems
  • Indication LED lights for TX, RX and Power
USB cable included
usb extension cable

Model number MWE820B
Recommended operating system
  • Windows 10 32/64, Windows 8 32/64-bit, Windows 7 32/64-bit, Server 2008 32/64, Server 2008 R2, Vista 32/64-bit, XP, 2000, ME, 98
  • Linux 2.40 or higher
  • Mac OS 8, OS 9, OS X
Processor Silicon Labs CP2102
Opto-coupler Fairchild 6N137
Power 5VDC provided by USB port
Output 1 RS232 2-wire, output voltage: ~8.9VDC
Output 2 RS422 4-wire Full Duplex, output voltage: ~5.0VDC
Output 3 RS485 2 wire Half Duplex, output voltage: ~5.0VDC
Installation 35mm DIN mount or screws
RS232, RS422, RS485 selection All ports on simultaneously
USB cable Included
USB interface Female type B, compliant with USB 1.1, 2.0, 3.0
USB signals VCC, DATA+, DATA-, GND, FG
Serial interface Screw terminal header
Serial signals RS232: TX, RX, GND
RS422: TX-, TX+, RX-, RX+, GND (full duplex)
RS485: D-, D+ GND (half duplex)
Baud rate 300 - 115.200bps, auto detection
Parity None, Odd, Even, Mark, Space
Data bits 7, 8
Stop Bits 1, 2
Data Control None, Xon/Xoff, Hardware
Flow control Automatic. No IRQ conflicts, no IO or DMA required
Buffer size 128/385 Bytes
Optical Isolation 700V continuous and 3500V spike
ESD protection 15KV/ 600W/ms high voltage protection
Indication LED lights TX, RX and Power
Operating humidity 5% To 95% - No Condensation
Dimensions 102mm x 69mm x 33mm
Operating Temp. -40 to 85C
Compliance CE, FCC, RoHS
Warranty 2-year Limited Warranty
ECCN 4A994.a
Schedule B 8471.80.1000
HTS 8517.18.0050

For alternative solutions please see our selection of other USB to RS485 / RS422 converters

Useful accessories
serial accessories

Copyright © 2023 Nordfield. Designed by
Your IP Address is:

McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams
wabusiness template