RS232 TO RS422, RS485 CONVERTER

These converters are designed around the LTC490 and the LTC485 interface chips. They connect in-line with the PC com port to provide signal conversions from the RS232C to RS422 differential line signals.

The units convert the TX and RX signals providing 4-wire (RS422) and 2-wire (RS485) buss implementations and provide a hardware RS232 handshaking pair for data flow control.

The input connection is pre-wired to take its power from the +DTR or +RTS connection and to provide feedback to the other input connections to indicate that the device is on-line.

DB9F to RJ45 converter
Available in RS422
and RS485 format
DB9F-RJ45
(modular network connector)


Need something else ?
See our custom units
or the Lower cost units.

DB25F to RJ45 converter
Available in RS422
and RS485 format
DB25F-RJ45
(modular network connector)

rj45_plug.gif

RJ45 PCB
RJ45 board
FEATURES

  • Up to 115K Baud data rates!

  • Tested at 115K Baud to 1000 feet with error free operation using level 5, twisted pair, network cable, without line terminators.

  • No delayed turn-a-round time! The RS485 operates up to 115K Baud with no delays.

  • Self-powered from the RS232C PC comm port. Requires the DTR or RTS line to be set high for operation

 

PIN ASSIGNMENTS
RS485 << RS232 >> RS422
RJ45 DB/9F /25F RJ45
RTS 1 2 3 TX OUT 1 RTS
CTS 2 3 2 RX IN 2 CTS
TX/RXa 3

1,4,6

 6,8,20 +DTR 3 TXa
TX/RXb 4 7,8,9 4,5,22 +RTS 4 TXb
5 5 7 GND 5 RXa
6 6 RXb
GND 7 7 GND
SHIELD 8 -- -- SHIELD 8 SHIELD
Other pin connections available on request. Minimum orders will apply to custom wiring.

ORDERING INFORMATION (minimum order 5 units)
RS422 - E DB9F input RJ45 output

$30.00US

30.00CD
RS422 - F DB25F input RJ45 output $30.00US 30.00CD
RS485 - E DB9F input RJ45 output $30.00US 30.00CD
RS485 - F DB25F input RJ45 output $30.00US 30.00CD
RS485 -G DB9F input RJ45 output $30.00US 30.00CD
RS485 - H DB25F input RJ45 output $30.00US 30.00CD

Typical output connections
RS485

RS422
TXa/RXa <<>> TXa/RXa TXa >> RXa

TXb/RXb <<>> TXb/RXb

 TXb >> RXb
RXa << TXa
RXb << TXb

RS422 CONFIGURATION

RS485 CONFIGURATION

RS422/485 ORDER FORM and information package.

Send certified cheque or money order only payable to: MicroLee Technology Inc.
Canadian orders Add $8.00CD for shipping (up to 10 items)
add 6%GST Ontario residents add 8%PST		 Mail to:
MicroLee Technology Inc.
28 Marlena Dr.
Scarborough, Ontario, M1E 2Z1
Canada
USA orders Add $9.00US (up to 5 items)
International orders Add $12.00US (up to 5 items)
international US money order only

 

Please send any inquiries to us via Email at "infosales@microleetech.com"

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© 1995 MicroLee Technology Inc. Last Updated: Nov. 12, 2007