ES-R-2001B-M EasySync, ES-R-2001B-M Datasheet - Page 7

• Manufacturer Part Number: ES-R-2001B-M
• Description: RS-232 Interface IC RS232 to 1 Prt RS422 /RS485, Metal
• Manufacturer: EasySync

4.2
Inside the unit, there are two 2x3 (JP1, JP2) header blocks which are jumpered to select the RS-232 port
pin assignment to DCE or DTE. The factory default setting is DCE.
4.3
A 3-pin DIP switch is used to set to select the mode of operation. The switches should be set to RS-422
mode or RS-485 mode as per the requirements of your application.
The RS-422 & RS-485 Mode Block Configuration Settings are shown in Table 2.
RS-232 DCE or DTE Pin Assignment
RS-422 and RS-485 Mode Block Configuration
Jumper
JP1 1-3
JP1 2-4
JP2 1-3
JP2 2-4
JP1 3-5
JP1 4-6
JP2 3-5
JP2 4-6
RS-422
RS-485
DCE setting
RS-232 port assigned to DCE (Data Communications Equipment). See
Figure 2.
RS-232 port assigned to DTE (Data Terminal Equipment). See See
Figure 2.
Table 1
Figure 2
Table 2
4 wire with handshaking
Jumper settings for RS-232 DCE or DTE Pin Assignment
Half Duplex (2 wire )
©2010 - 2011 EasySYNC Ltd.
Half Duplex (2 wire)
Full Duplex (4 wire)
Jumpers used to select RS-232 DCE and DTE
Operation Mode
Jumper pin numbers
without Echo
2
1
2
1
with Echo
ES-R-2x01B-M RS-232 to RS-422/RS-485 Converters Manual
RS-422 and RS-485 configuration
4
3
4
3
6
5
6
5
Function
JP2
JP1
Document Reference No.: ES_000086
DTE setting
OFF
OFF
OFF
ON
S1
OFF
OFF
Clearance No.: ES
ON
ON
S2
OFF
ON
ON
ON
S3
Version 1.0
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