Resistor Setting To Configure Com1; Jumper Setting For Rs422 Rxd Termination (Com1); Com1 Configuration Jumpers And Resistors; Serial Ports Com1 And Com2 Jumper And Resistor Settings - Kontron CP6500-V User Manual

CP6500-V
4.1.7

Serial Ports COM1 and COM2 Jumper and Resistor Settings

4.1.7.1 COM1 Jumper and Resistor Setting
The serial interface COM1 (J9) may be configured for either RS232 or RS422 using solder
jumpers and appropriate resistors. The following figure and tables indicate the physical
locations of these jumpers and resistors, and their required configurations for the various
operational modes.
Figure 4-1:

COM1 Configuration Jumpers and Resistors

Table 4-7:

Resistor Setting to Configure COM1

RESISTOR
JP8 (soldered or 0 ohm, 0805 package)
R311 (4700 ohm, 0603 package)
R330 (soldered or 0 ohm, 0603 package)
The default setting is indicated by using italic bold.
RS422 and RS485 COM1 Termination
When COM1 is configured for RS422 operation and is the last device on the RS422 bus, then
the RS422 interface must provide termination resistance. The purpose of jumpers JP5 and JP7
is to enable this line termination resistor (120 ohm).
Table 4-8:

Jumper Setting for RS422 RXD Termination (COM1)

TERMINATION
ON
OFF
The default setting is indicated by using italic bold.
ID 28945, Rev. 01
JP7
JP3
JP8
COM1
JP5
RS232
Closed
Open
Open
JP5
Closed (soldered or 0 ohm, 0805 package)
Open
© 2005 Kontron Modular Computers GmbH
Configuration
R329
R320
JP4
R330
R311
JP6
RS422
Open
Open
Open
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