Configuration
CP6000
Page 4 - 6
© 2005 Kontron Modular Computers GmbH
ID 27942, Rev. 05
2794
2.05.UG.VC.051020/17275
8
P R E L I M I N A R Y
RS-422 and RS-485 COM1 Termination
When COM1 is configured for RS-422 or RS-485 operation and is the last device on the RS-
422 or RS-485 bus, then the RS-422 or RS-485 interface must provide termination resistance.
The purpose of jumpers JP5 and JP7 is to enable this line termination resistor (120 ohm).
The default setting is indicated by using italic bold.
The default setting is indicated by using italic bold.
Table 4-7: Jumper Setting for RS-422 RXD Termination (COM1)
TERMINATION
JP7
ON
Closed (soldered or 0 ohm, 0805 package)
OFF
Open
Table 4-8: Jumper Setting for RS-422 TXD and RS-485 Termination (COM1)
TERMINATION
JP5
ON
Closed (soldered or 0 ohm, 0805 package)
OFF
Open
Note ...
COM1 is available on the front and rear I/O without any switch. It is
strongly recommended to use only one option at the same time.
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