Advantech PPC-S123 manual Cmos Clear for External RTC JP7, COM-port Interface

4.2 CMOS Clear for External RTC (JP7)

Warning: To avoid damaging the computer, always turn off the power supply before setting “Clear CMOS”. Set the jumper back to “Normal operation” before turning on the power supply.

Table 4-3: Clear CMOS / External RTC (JP7)

*Normal operation Clear CMOS

1 2 3

1 2 3

*default setting

4.3COM-port Interface

The panel PC provides four serial ports (COM1, 3, 4: RS-232; COM2: RS-232/422/485) in one COM port connector.

4.3.1 COM2 RS-232/422/485 setting (JP2, JP3, JP4)

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

Table 4-4: COM2 RS-232/422/485 setting (JP2, JP3)

*RS-232 RS-422/485

2

JP2

1

2

JP3

1

6		2
5	JP2	1
6	JP3	2
5		1

6

5

6

5

* default setting

Chapter 4 Jumper Settings and Connectors 35