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Serial / RS232 / RS485 / RS422 / TTL Converter Products

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  • PROFESSIONAL QUALITY
  • USB to Serial Adapters
  • Superior FTDI Chipset
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  • Industry Proven 99.9% Reliable
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INDUSTRIAL USB TO 4 PORT RS485/RS422 CONVERTER

Serialcomm - MODEL USB-4485

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 >>


INDUSTRIAL USB TO 4 PORT
 RS485/RS422 ADAPTER
WINDOWS 8/WINDOWS 7/VISTA/XP/98/
WIN CE/MAC/LINUX COMPATIBLE

 

30 Day Money Back / 5 Year Replacement Guarantee

SerialComm Model: USB-4485
Download Specs.   USB-4485.PDF

  DOWNLOAD DRIVERS

FREQUENTLY ASKED QUESTIONS

$95.95 - IN STOCK

 

DESCRIPTION

The SerialComm USB-4485 is a high quality, high performance industrial-grade bi-directional port powered or external powered 4 port USB to RS485 / RS422  converter housed in a heavy-duty steel case.  It can convert any standard full duplex USB port to four RS485 or RS422 ports and is bi-directional half-duplex for RS485 and full duplex for RS422 via COM ports on the host computer. The USB to 4 port 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 but can also be powered with an external power supply.  It also features data direction auto-turnaround eliminating the need for flow control.. The USB-4485 features a professional terminal block with optional selectable 120 Ohm termination via a jumper.  The USB-4485 has a Type A female connector on the USB side and four DB9 male connectors on the RS485 / RS422 side.  The multiple port converter includes 4 professional terminal blocks with optional selectable 120 Ohm termination.  The terminal blocks and software drivers are included with the converter.

The USB-4485 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.

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FEATURES

  • Plug-and-Play (hot-pluggable)
  • Adds four RS-485/RS422 ports using one USB port
  • Operates from 300 to 230,400 baud
  • Optional terminal block included
  • Built-in optional selectable 120 Ohm termination
  • USB 1.1 and 2.0 compatible
  • Port powered - no external power needed
  • Supports all RS-232C signals: TX, RX, RTS, CTS, DTR, DSR, RI and GND
  • 3 feet (1m) cable for convenience
  • 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 230,400 Baud
CONNECTOR TYPES: USB-Side: Type B Female and RS-485/RS-422 Side: DB9 Male or Dual Function 5 Position Terminal Block
DISTANCE: USB Side: 10 ft (3m) and RS-485/RS-422 Side: 4000 ft (1.2km)
LED INDICATIONS: TX1, RX1, TX2, RX2, TX3, TX4, and RX4
DRIVERS: FTDI drivers are included in package
ELECTRICAL
POWER SOURCE: Port Powered From USB Port or 5VDC/1A (Input: 100-240VAC 50/60Hz, USB Type A Plug)
CURRENT CONSUMPTION: Less Than 300 mA
STATIC PROTECTION: 15KV Electric Static Discharge (ESD) Protection
SURGE PROTECTION: 600W/Sec Surge Protection
CONVERSION IC: FTDI FT4232H - For more information from FTDI regarding their IC; follow this link.
MECHANICAL
HOUSING: Heavy Duty Steel Case
WEIGHT: 16.1oz (456.5 grams)
DIMENSIONS: 6.30 X 3.94 X 1.36 in (160.0 X 100.0 X 34.4 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

COM 1

RS-485 D- D+     GND
RS-422 T- T+ R+ R- GND
PIN # 1 2 3 4 5

COM 2

RS-485 D- D+     GND
RS-422 T- T+ R+ R- GND
PIN # 1 2 3 4 5

COM 3

RS-485 D- D+     GND
RS-422 T- T+ R+ R- GND
PIN # 1 2 3 4 5

COM 4

RS-485 D- D+     GND
RS-422 T- T+ R+ R- GND
PIN # 1 2 3 4 5


DB9 MALE

 INCLUDED TERMINAL BLOCKS

                

 
     

FRONT PANEL

 

     

BACK PANEL

 

     

APPLICATIONS

FIGURE 1 - 4 PORT FUNCTIONAL DIAGRAM

FIGURE 2 - EXTENDING A COM PORT DISTANCE IN RS-485 MODE

FIGURE 3 - MASTER/SLAVE MULTIPLE DROP CONFIG. IN RS-485 MODE

FIGURE 4 - EXTENDING A COM PORT DISTANCE IN RS-422 MODE

FIGURE 5 - MASTER/SLAVE MULTIPLE DROP CONFIG. IN RS-422 MODE

     

TROUBLESHOOTING INSTRUCTIONS

 

Using one USB-4485 unit:

Perform a loop back test on one unit: Connect the TX+ to RX+ and TX- and RX- on one the four RS-422 ports. Connect the USB connector on the cable to the USB port of the computer Install the USB-4485 FTDI driver on the computer per instructions provided. Running a hyper terminal program on the PC, send ASCII characters to the USB-4485 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-4485 unit is working properly. When there is constant RX data you should see the associated GREEN light blink.  When there is constant TX data you should see the associated RED light blink.

Using two USB-4485 units:

Check that all connections comply with the connection diagrams. Perform a loop back test on two units: Connect the two D+ to D+ and D- and D- on two USB-4485 RS-485 ports. Connect the two USB connectors to the USB ports of the computers. Install the USB-4485 FTDI driver on the computer per instructions provided. Running hyper terminal programs on both PCs, send ASCII characters to the USB-4485 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-4485 units are working properly. When there is constant RX data you should see the associated GREEN light blink.  When there is constant TX data you should see the associated RED 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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