Advantech PPC-A84/A120-X5X user manual COM2 RS-232/422/485 setting JP3, JP4,JP5

3.6.1Watchdog activity selection (JP2)

When the watchdog timer activates (i.e. CPU processing has come to a halt), it can reset the system or generate an interrupt on IRQ11. This can be set via jumper JP2 as shown below:

Table3-5: Watchdog activity selection (JP2)

	System reset				IRQ11
2		4	6	2	4	6

*default setting

3.7COM2 RS-232/422/485 setting (JP3, JP4,JP5)

COM2 can be configured to operate in RS-232/422/485 mode. This is done via JP3,JP4,and JP5.

Table 3-6: COM2 RS-232/422/485 setting (JP3, JP4)

*RS-232 RS-422/485

JP4	2
	1
JP3	2
	1

6	JP4	2
5		1
6	JP3	2
5		1

6

5

6

5

* default setting

44 PPC-A84/A120 User's Manual