eWON4002™

Installation Guide

ver 2 . 04

Positions

Mode

 

 

OFF

RS232

 

ON

 

 

 

OFF

RS422, RS485

 

 

WITHOUT polarisation and termination resistors

ON

 

 

 

OFF

RS422, RS485

 

 

WITH polarisation and termination resistors

ON

 

Table 10: Serial mode configuration switches

Note: the 3 switch configurations shown in the table above are the only configurations giving satisfactory results.

Warning: The switch 2 is reserved and must stay OFF. Note that the switches 3 & 4 need to have the same position (both ON or both OFF). When they are ON, this connects the internal polarisation (typ 680 Ohms) and termination (typ 120 Ohms) resistors. This configuration applies only to RS4xx lines conforming to good practices.

5.4.2 Serial port #2

Specification

 

Value

 

 

 

Physical mode

 

Full RS232

 

 

 

Normal isolation

 

NOT ISOLATED

 

 

 

Pinout connector

 

See label and appendix (Relays output on page 30)

 

 

 

Termination/polarization

 

None

 

 

 

 

Table 11: Serial port 2 specification

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Siemens eWON4002 manual Serial port #2, Positions Mode