Advantech ARK-5280 Manual do Utilizador descarregar pdf (Página 38)

ARK-5280 User Manual 22

3.4 COM2 RS-232/422/485 Jumper setting (JP1)

The COM2 port located on front metal face plate of ARK-5280 unit can

be configured to operate in RS-232, RS-422 or RS-485 mode by setting

up the Jumper Pins of JP1 located on internal motherboard.

3.5 CMOS Clearance (JP2)

This jumper is used to erase CMOS data (including the setting of date,

time and password) and reset system BIOS information.

The procedure for clearing CMOS is:

1. Turn off the system.

2. Short pin 1 and pin 2.

3. Turn on the system. The BIOS is now reset to its default setting

Table 3.2: COM2 RS-232/422/485 Jumper Selection

Function Pin Setting

RS-232 * 1-2 closed*

RS-422 3-4 closed

RS-485 5-6 closed

(*): means default setting of the jumper/function

Table 3.3: Clear CMOS Jumper (JP3)

Function Pin Setting

Normal * 1-2 open*

CLEAR RTC 1-2 closed

(*): means default setting of the jumper/function

Warning: To avoid damaging the computer, always turn off

the power supply before setting Clear CMOS.

Before turning on the power supply, set the

jumper back to 3.0 V Battery On.

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Advantech ARK-5280 Manual do Utilizador Página 38