Document Reference No.: ES_000011
ES-R-2x01-M RS232 to RS422 / RS485 Converter User Guide
Version draft
Clearance No.: ES#*
*****
©2009 EasySync Ltd.
9
2.1.5
RS232 Interface Configuration
The RS232 connector is a 9-way D-Type socket (DE-9S) that can be configured as a DCE or a DTE using
internal jumpers JP5 and JP6.
2.1.5.1 DCE Configuration
The factory settings for JP5 and JP6 select a DCE type RS232 interface that results in the 9-way RS232
D-Type socket having the following pin-out and signal directions.
DE-9S Pin Name
Comment
1
DCD
Linked to pin 4 and pin 6
2
Rx (Out)
An output pin for DCE type RS232 interface
3
Tx (In)
An input pin for DCE type RS232 interface
4
DTR
Linked to pin 1 and pin 6
5
GND
GND
6
DSR
Linked to pin 1 and pin 4
7
RTS (In)
An input pin for DCE type RS232 interface
8
CTS (Out) An output pin for DCE type RS232 interface
9
No connection
Shield
Shield
No connection
Table 2.6 – RS232 DE-9S DCE Pin-Out (Default)
To select the DCE configuration fit links between the following pins on JP5 and JP6.
JP5 DCE Selection
Link pins 1 – 3
Link pins 2 – 4
JP6 DCE Selection
Link pins 1 – 3
Link pins 2 – 4
Table 2.7 – JP5 & JP6 DTE-DCE Configuration Jumper – Set for DCE
Preliminary
