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Serial / RS232 / RS485 / RS422 / TTL Converter Products

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  • PROFESSIONAL QUALITY
  • USB to Serial Adapters
  • Superior FTDI Chipset
  • Standard or Isolated
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ISOLATED USB TO RS485 / RS422 ADAPTER

Serialcomm - MODEL USB-ISO-485

Sima S. Enterprises offers a diverse selection of high quality, high performance, USB to RS232 / RS485 / RS422 converter products from Serialcomm the choice manufacturer of low priced data communication products without sacrificing quality and reliability. Our bidirectional USB to serial converters are powered by very reliable signal processors featuring the autosensing feature and operate reliability and flawlessly without the need for flow control or software drivers.  All of our USB to RS232/RS485/RS422 converters come with optional terminal blocks for easy installation. All of our products are CE, FCC and RoHS certified by a reputable independent 3rd party testing facility and backed by our 30 day money back guarantee and 5 year warranty.

View all of our USB To Serial Converters >>


ISOLATED USB TO
 RS485 / RS422 CONVERTER

WINDOWS 8 /WINDOWS 7/VISTA/XP/98/
WIN CE/MAC/LINUX COMPATIBLE

 

30 Day Money Back / 5 Year Replacement Guarantee

SerialComm Model: USB-ISO-485
Download Specs.   USB-ISO-485.PDF

  DOWNLOAD DRIVERS

FREQUENTLY ASKED QUESTIONS

$59.95 - IN STOCK

 

DESCRIPTION

The SerialComm USB-ISO-485 is a high performance idustrial-grade bi-directional port powered 2500V optically isolated USB to RS485 / RS422 converter in a 9 pin format.  It can convert any standard full duplex USB port to a RS485 or RS422 signal in either direction via a COM port on the host computer. The USB-ISO-485 optical isolation protects the USB port from voltage surges, lightning strikes, GND loops and noise conditions from the RS485/RS422 port.   The USB to RS485 / RS422 converter utilizes the FTDI chipset making it compatible with most computer systems and operating systems.  The unit is powered from the USB port and requires no external power.  It also features data direction auto-turnaround eliminating the need for flow control. The USB-ISO-485 features an optional professional terminal block for convenience.  The USB-ISO-485 has a Type A female connector on the USB side and a DB9 male connector on the RS485/RS422 side.  The USB cable, terminal block and software drivers are included with the converter.

The USB-ISO-485 uses the latest FTDI chipset and is fully compatible with Windows 8 32/64, Windows 7 32/64, Vista 32/64, Server 2003, Server 2008, Server 2008 R2, XP 32/64, 2000, 98Se, CE, Mac 8/9/X, Linux.

FEATURES

  • Plug-and-Play (hot-pluggable)
  • Adds one RS-485/RS-422 port using one USB port
  • Provides 2500Vrms Isolation
  • Operates from 300 to 128,000 baud
  • Optional terminal block included
  • USB 1.1 and 2.0 compatible
  • Port powered - no external power needed
  • 6 feet (2m) cable for convenience
  • Power/Transmit/Receive LED indicators
  • Data direction auto-turnaround - no flow control necessary
  • Internal 128/385 byte TX/RX buffers
  • No IRQs, IO, DMA required. No IRQ conflicts
  • Supports remote wakeup and power management
  • Easy to install included drivers
  • Built-in surge and static protection
  • 5 year manufacturer's warranty
  • RoHS, CE and FCC certified

 

 

     

SPECIFICATIONS

COMMUNICATION
STANDARDS: USB 2.0 and 1.1 Standards - RS-485 and RS-422 Standards
BAUD RATES: From 300 Baud To 128,000 Baud
CONNECTOR TYPES: USB Side: Type A Female and RS-485/RS-422 Side: DB9 Male or 6 Position Terminal Block
DISTANCE: USB Side: 10 ft (3m) and RS-485/RS-422 Side: 4000 ft (1.2m)
LED INDICATIONS: RX (Yellow), TX (Green) and Power (Red)
DRIVERS: FTDI Drivers are included in package
ELECTRICAL
POWER SOURCE: Port Powered From USB Port
CURRENT CONSUMPTION: Less Than 100 mA
ISOLATION: 2500 V (2500Vrms 1 min, AC)
STATIC PROTECTION: 15KV Electric Static Discharge (ESD) Protection
SURGE PROTECTION: 600W/Sec Surge Protection
CONVERSION IC: FTDI FT232RL - For further information from FDTI regarding their IC; follow this link
MECHANICAL
WEIGHT: 4.6oz (131 grams)
DIMENSIONS: RS-485/RS-422 Housing Without Terminal Block:
4
.45 X 2.54 X 1.00 in (113.1 X 64.4 X 25.4 mm)
RS-485/RS-422 Housing With Terminal Block:
5
.28 X 2.54 X 1.00 in (134.0 X 64.4 X 25.4 mm)
ENVIRONMENTAL
OPERATING TEMP.: -40ºF to 185ºF (-40ºC to 85ºC)
OPERATING HUMIDITY: 5% To 95% - No Condensation
QUALITY
PRODUCT SAFETY: CE, FCC and RoHS Conformance Certified
RELIABILITY: Low Failure Rate - 99+% Reliability Since Inception
WARRANTY: 5 Year Replacement Warranty
     

PINOUTS

 

RS485 / RS422 SIDE DB9 OR TERMINAL BLOCK

FUNCTION T/R+ T/R- RXD+ RXD- GND
RS485 D+ D-      
RS422 TX+ TX- RX+ RX- GND
PIN # 1 2 3 4 5

DB9 MALE OR 5-WAY TERMINAL BLOCK

USB to RS422 adapter                  

 

RS485 / RS422 SIDE RJ45

FUNCTION T/R+ T/R- RXD+ RXD- GND
RS485 D+ D-      
PIN # 5 4     2,7

DB9 MALE OR 5-WAY TERMINAL BLOCK

 

USB to RS422 adapter       

 
     

APPLICATIONS

USB TO RS485 MODE OPTION:

FIGURE 1: EXTENDING THE USB DATA DISTANCE IN RS485 MODE


FIGURE 2: MASTER / SLAVE MULTI-DROP CONFIGURATION IN RS485 MODE

 

USB TO RS422 MODE OPTION:

FIGURE 3: EXTENDING THE USB DATA DISTANCE IN RS422 MODE


FIGURE 4: MASTER / SLAVE MULTI-DROP CONFIGURATION IN RS422 MODE

 


DIMENSIONS

 


TROUBLESHOOTING INSTRUCTIONS

 

Using one USB-ISO-485 unit:

Perform a loop back test on one unit: Connect the T/R+ to RXD+ and T/R-- to RXD- on one USB-ISO-485 RS-422 port. Connect the USB connector on the cable to the USB port of the computer.  Install the USB-ISO-485 FTDI driver on the computer per instructions provided. Running a hyper terminal program on the PC, send ASCII characters to the USB-ISO-485 converter from one PC port, and check that the characters are received at the same PC port. This tests that the transmit and receive functions of the USB-ISO-485 unit is working properly. When power is on the RED light will be on.  When there is constant TX data you should see the YELLOW light blink.  When there is constant TX data you should see the GREEN light blink.

Using two USB-ISO-485 units:

Perform a loop back test on two units: Connect the T/R+ to T/R+ and T/R- to T/R- on the USB-ISO-485 two RS-485 ports. Connect the two USB connectors to the USB ports of the computers. Install the USB-ISO-485 FTDI driver on the computer per instructions provided. Running hyper terminal programs on both PCs, send ASCII characters to the USB-ISO-485 converter from one PC port, and check that the characters are received at the 2nd PC port. Repeat the test in the opposite direction. This tests that the transmit and receive functions of both USB-485C units are working properly. When power is on the RED light will be on.  When there is constant TX data you should see the YELLOW light blink.  When there is constant TX data you should see the GREEN light blink.

Download FREE FULL VERSION AccessPort Advanced Serial Monitor, Simulation and Data Analysis Software Tool.  This software tool is great for testing converters.  Supports Windows 98/XP/VISTA/WIN 7.  DOWNLOAD SOFTWARE AND USER MANUAL

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