Document Reference No.: ES_000086

ES-R-2x01B-M RS-232 to RS-422/RS-485 Converters Manual

Version 1.0

Clearance No.: ES

©2010 - 2011 EasySYNC Ltd.

2

1

Introduction ............................................................................................ 3

2

Specification ............................................................................................ 4

3

Features of the ES-R-2x01B-M................................................................. 5

3.1

Optical Isolation & Surge Protection (ES-R-2101B-M only)........................... 5

3.2

Power Supply ................................................................................................ 5

3.3

Enclosure ...................................................................................................... 5

3.4

Configuring for RS-422 and RS-485 Modes ................................................... 5

4

Hardware Installation.............................................................................. 6

4.1

General Notes and Warnings......................................................................... 6

4.2

RS-232 DCE or DTE Pin Assignment .............................................................. 7

Table 1

Jumper settings for RS-232 DCE or DTE Pin Assignment ......................... 7

4.3

RS-422 and RS-485 Mode Block Configuration .............................................. 7

Table 2

RS-422 and RS-485 configuration ........................................................... 7

4.4

Termination and Biasing Configuration ......................................................... 8

Table 3

Termination and Biasing configuration.................................................... 8

5

Connector Pinout Information ................................................................. 9

5.1

RS-232 Signal Pin-outs of DB-9 Female (DCE) .............................................. 9

5.2

RS-232 Signal Pin-outs of DB-9 Female (DTE) .............................................. 9

5.3

RS-422 Signal Pin-out ................................................................................. 10

5.4

RS-485 Signal Pin-out (half duplex)............................................................ 12

5.5

RS-485 Signal Pin-out (full duplex) ............................................................ 14

6

Contact Information ...............................................................................16

7

Legal Disclaimer .....................................................................................17

Appendix A - List of Figures and Tables ........................................................18

Appendix B - Revision History.......................................................................19