Advantech IPPC-6172A Series, User Manual

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IPPC-6172A User Manual 18
3.1.3 COM4 Settings (J20)
This jumper is used to select RS232 (default) / RS422 / RS485
3.1.4 Clear CMOS (CLRTC1)
This jumper is used to erase CMOS data and reset system BIOS information. Follow
the procedures below to clear the CMOS.
1. Turn off the system.
2. Remove the Jumper CLRTC1(1-2).
3. Close jumper CLRTC1(2-3).
4. Remove the Jumper CLRTC1(2-3).
5. Close jumper CLRTC1(1-2).
6. Turn on the system.The CMOS is now cleared.
7. Set the BIOS to default..
Table 3.3: COM4 Settings
RS-232 RS-422 RS-485
Pin RS-232 RS-422 RS-485
1 NDCD TX- D-
2 NRX TX+ D+
3 NTX RX+
4 NDTR RS-
5 GND
6 NDSR
7 NRTS
8 NCTS
9 NRI
Table 3.4: Clear CMOS
Clear
Normal