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Serial / RS232 / RS485 / RS422 / TTL Converter Products

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  • INDUSTRIAL AND COMMERCIAL
  • RS232 To RS485/422 Converters
  • Standard or Isolated
  • Port or External Powered
  • Industry Proven 99.9% Reliable
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INDUSTRIAL - EXTERNALLY POWERED - OPTO-ISOLATED - RS232 TO 4 WIRE RS485 / 4 WIRE RS422 CONVERTER

Serialcomm - Model CON-485/422-EE4

Sima S. Enterprises offers a diverse selection of high quality, high performance, RS232 to RS485/RS422 converter products from Serialcomm the choice manufacturer of low priced data communication products without sacrificing quality and reliability. Whether you are looking for industrial or commercial grade, port or externally powered, standard or isolated converters we have the solution. Our bidirectional RS232 to RS485/RS422 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 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 RS232 to RS422 Converters >>


INDUSTRIAL
EXTERNALLY POWERED
OPTO-ISOLATED RS232 TO
4 WIRE RS485 / 4 WIRE RS422
 CONVERTER

 

30 Day Money Back / 5 Year Replacement Guarantee

SerialComm Model: CON-485/422-EE4
Download Specs.   CON-485/422-EE4.PDF

FREQUENTLY ASKED QUESTIONS

$45.95 - IN STOCK

OPTIONAL DIN RAIL MOUNTS - $3.00

 

DESCRIPTION

The SerialComm CON-485/422-EE4 is a very high quality and very reliable industrial-grade bi-directional externally-powered 2.5K isolated RS-232 to 4-wire RS-485 or RS-422 converter which converts full-duplex RS-232 to a full-duplex four-wire RS-485 or full-duplex four-wire RS-422.  The converter can extend the distance of the RS232 for up to 4000 ft (1.2km).  This converter is ideal for any demanding application whether indoor in a lab, server room, office, at home or outdoors within the temperature range of -40ºF to 185ºF (-40ºC to 85ºC).  This converter features auto sensing data turnaround eliminating the need for software drivers or handshake flow control.  The CON-485/422-EE4 is an effective solution for protecting RS-232, RS-485 and RS-422 devices from voltage surges, lightning strikes, ground loop conditions and signal noise problems. The unit is not reliant on port power so you do not have to worry about the RS-232's ability to power the converter.  The CON-485/422-EE4 has a DB-9 female connector on the RS-232 end, and either DB-9 male or RJ45 connectors on the RS-485/RS-422 end.   A terminal block is included for the RS-485/RS-422 port. The terminal block plugs into the RS-485/RS-422 port, providing screw-lug wire terminations for the port. The unit is enclosed in a heavy duty steel housing for rugged applications.  This converter features optional DIN rail mounts.
 

FEATURES

  • Plug-and-Play (hot-pluggable)
  • Includes a terminal block with selectable built-in 120 termination via jumpers
  • Optional DIN rail mounts available on checkout
  • Flexible DB-9 cable or screw down wire installation
  • Operates from 0 to 115.2K baud
  • Supports 4-wire RS-485 and 4-wire RS-22
  • Port powered - no external power needed
  • Data direction auto-turnaround - no software is necessary
  • External 9V powered with included 120VAC/240VAC adapter
  • Built-in 600W/sec surge protection
  • Built-in 15KV static protection
  • 5 year manufacturer’s warranty
  • RoHS, CE and FCC certified
  • Manufactured to ISO-9001 standards

 

     

SPECIFICATIONS

COMMUNICATION
STANDARDS: EIA/TIA RS-232C Standard and 4-wire RS-485 and 4-wire RS-422 Standards
BAUD RATES: From 0 Baud To 115,200 Baud
CONNECTOR TYPES: RS-232 Side: DB9 Female and RS-485/RS-422 Side: either DB9 Male. RJ45 or 5-way Terminal Block
DISTANCE: RS-232 Side: 16 ft (5m) and RS-485/RS-422 Side: up to 4000 ft (1.2km)
MAX # OF CONNECTIONS: 128 Connection Drops
ELECTRICAL
POWER SOURCE: 9VDC
DC/AC POWER ADAPTER: 9VDC/1A (Input: 100-240VAC 50/60hz US Type A Plug)
OPTICAL ISOLATION: 2500V (2500Vrms 1 min, AC)
CURRENT CONSUMPTION: Less Than 100 mA
STATIC PROTECTION: 15KV Electric Static Discharge (ESD) Protection
SURGE PROTECTION: 600W/Sec Surge Protection
CONVERSION IC: Maxim MAX485 - For further information from Maxim regarding their IC follow this link.
MECHANICAL
HOUSING: Heavy Duty Steel Case
DIN RAIL: Optional DIN Rail Mounts
WEIGHT: 7.1oz (200 grams)
DIMENSIONS: 4.06 X 3.25 X 0.87 in (103.0 X 82.6 X 22.0 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
 

RS232 SIDE

RS485 / RS422 SIDE

SIGNAL DCD DTR DSR RTS CTS TX RX GND
PIN # 1 4 6 7 8 2 3 5
FUNCTION TIED TIED TX RX GND
 
SIGNAL T- T+ R+ R- GND
PIN # 1 2 3 4 5
RS-485  T- T+ R+  R- GND
RS-422  T- T+    R+   R- GND
 

DB9 FEMALE

DB9 MALE OR TERMINAL BLOCK

rs232 to rs485 / rs422 converter male   

RJ45 FEMALE

 
SIGNAL T+ T- R+ R- GND
PIN # 1 2 3 6 7,8
RS-485  T+  T-   R+ R- GND
RS-422  T+  T-   R+ R- GND
 
   

 

     

TERMINATION GUIDE
 

The CON-485/422-EE4 terminal block has an optional built-in 120 ohm termination. 120 ohm termination is an advanced feature typically used to reduce noise and signal reflections. It is recommended to use 120 Ohm termination if you are exceeding 600 feet in distance, 19.6K baud or in a noisy environment. The terminal blocks are shipped with 120 Ohm termination off but can be turned on using the convenient jumper setting located on the left bottom of the terminal block.
.
     

5 Position With 120 Ohm Off

 

5  Position With 120 Ohm On

 
     

APPLICATIONS

RS232 TO 4-WIRE RS485 MODE OPTION:

FIGURE 1: EXTENDING THE RS232 DATA DISTANCE IN RS485 MODE


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

 

RS232 TO 4-WIRE RS422 MODE OPTION:

FIGURE 3: EXTENDING THE RS232 DATA DISTANCE IN RS422 MODE


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

 


TROUBLESHOOTING INSTRUCTIONS

 

Using one CON-485/422-EE4 unit:

Check that all connections comply with the connection diagrams. Perform a loop back test on one unit: Connect the TX+ to RX+ and TX- to RX- on the RS-485/RS-422 port. Connect the RS-232 port to the PC RS-232 port. Running a hyper terminal program on the PC, send ASCII characters to the CON-485/422-EE4 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 CON-485/422-EE4 unit is working properly.

Using one CON-485/422-EE4 unit:

Check that all connections comply with the connection diagrams. Perform a loop back test on two units: Connect the two RS-485 or RS-422 ports. Connect the two RS-232 ports to two PC RS-232 ports. Running hyper terminal programs on both PCs, send ASCII characters to the CON-485/422-EE4 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 CON-485/422-EE4 units are working properly.

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

 

 


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