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RS232 TO RS485 CONVERTER

DESCRIPTION

The SerialComm CON-485-PE9 is a very high quality and reliable compact bi-directional port-powered RS232 to RS485 converter which converts full-duplex RS232 to a half-duplex two-wire RS485. 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 -4ºF to 140ºF (-20ºC to 60ºC). The converter is port-powered and derives power by amplifying the RS232 data lines requiring no external power at all. This converter features auto sensing data turnaround eliminating the need for software drivers or handshake flow control. This device is truly plug-and-play and simple enough for the novice. The CON-485-PE9 has a DB9 female connector on the RS232 end, and DB9 male connector on the RS485 end. Two separate terminal blocks, a rugged terminal block with no exposed jumpers and a terminal block with built-in selectable 120 Ohm termination via jumper are included with the product for maximum flexibility. The terminal blocks plug into the RS485 end of the converter, providing screw-lug wire terminations for the port.

SERIAL RS232 TO RS485 CONVERTER

30-day Money Back Guarantee / 5-year Replacement Warranty
RS232 to RS485 Converter

SerialComm Model: CON-485-PE9

Price: $14.95

FEATURES

  • Plug-and-Play (hot-pluggable)
  • Includes terminal block with selectable built-in 120 termination via jumper
  • Includes rugged terminal block with no exposed jumpers
  • Flexible DB9 cable or screw down wire installation
  • Operates from 300 to 115.2K baud
  • Port powered - no external power needed
  • Data direction auto-turnaround - no software is necessary
  • Built-in 600W surge protection
  • Built-in 15KV static protection
  • MTBF(Mean Time Before Failure): 231,900 Hours
  • 5 year manufacturer's warranty
  • RoHS, CE and FCC certified
  • Manufactured to ISO-9001:2015 standards

DATASHEETS


2D CAD DRAWINGS AND 3D MODELS

COMMUNICATION
STANDARDS: EIA/TIA RS232 Standard and RS485 Standard
BAUD RATES: From 300 Baud To 115,200 Baud
CONNECTOR TYPES: RS232 Side: DB9 Female and RS485 Side: either DB9 Male or 3-way Terminal Block
DISTANCE: RS232 Side: 16 ft (5m) and RS485 Side: up to 4000 ft (1.2km)
MAX # OF CONNECTIONS: 32 Connection Drops
ELECTRICAL
POWER SOURCE: Port Powered From RS232 Data Lines
CURRENT CONSUMPTION: Less Than 10 mA
STATIC PROTECTION: 15KV Electric Static Discharge (ESD) Protection
SURGE PROTECTION: 600W Surge Protection
MECHANICAL
HOUSING: Rugged ABS
WEIGHT: With Terminal Block: 1.2oz (36 grams)
Without Terminal Block: 0.8oz (24 grams)
DIMENSIONS: With Terminal Block: 3.15 X 1.33 X 0.70 in (80.0 X 33.8 X 17.8 mm)
Without Terminal Block: 2.47 X 1.33 X 0.70 in (62.8 X 33.8 X 17.8 mm)
ENVIRONMENTAL
OPERATING TEMP.: -4ºF to 140ºF (-20ºC to 60ºC)
STORAGE TEMP.: -40ºF to 185ºF (-40ºC to 85ºC)
OPERATING HUMIDITY: 5% To 95% - No Condensation
QUALITY
PRODUCT SAFETY: CE, FCC, RoHS 3, and REACH certified
MEAN TIME BEFORE FAILURE: 231,900 Hours
RELIABILITY: Low Failure Rate - 99+% Reliability Since Inception
WARRANTY: 5-year Replacement Warranty

RS232 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

DB9 FEMALE

RS232 to RS485 Converter

RS485 SIDE

SIGNAL D- D+ GND
PIN # 1 2 5
FUNCTION D- D+ GND

DB9 MALE OR TERMINAL BLOCK

RS232 to RS485 Converter RS232 to RS485 Converter RS232 to RS485 Converter

TERMINAL BLOCK SELECTION GUIDE

The CON-485-PE9 comes with two terminal blocks for maximum performance and flexibility. One terminal block is a rugged terminal block which is sealed to provide protection from the elements and vibration. The other terminal block has a built-in 120 Ohm termination selectable by a jumper on the terminal block. Both terminal blocks include fastening hardware.

RS232 to RS485 Converter

Terminal Block With Selectable 120 Ohm Termination

RS232 to RS485 Terminal Block

Rugged Sealed Terminal Block

TERMINATION GUIDE

The CON-485-PE9 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.

RS232 to RS485 Converter
3 Position With 120 Ohm Off
RS232 to RS485 Converter
3 Position With 120 Ohm On

Using two CON-485-PE9 units:

Check that all connections comply with the connection diagrams. Perform a loop back test on two units: Connect the two RS485 ports. Connect the two RS232 ports to two PC RS232 ports. Running hyper terminal programs on both PCs, send ASCII characters to the CON-485-PE9 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-PE9 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 7/8/10/11.  DOWNLOAD SOFTWARE AND USER MANUAL

RS232 To RS485 Converter Figure 1

FIGURE 1: EXTENDING THE RS232 DATA DISTANCE

RS232 To RS485 Converter Figure 2

FIGURE 2: MASTER / SLAVE MULTI-DROP CONFIGURATION

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