Advantech ARK-1221L User Manual page 21

Table 2.3: JCMOS1 (Main Board): Clear CMOS
1-2 Normal operation (default)
2-3 Clear CMOS
Note!
JCMOS1 should only be accessed by skilled personnel.
Table 2.4: CN18 (Main Board): M.2 B-Key Interface Selection
PIN Description
1-2 Short PCIe (default)
1-2 NC USB 3.2 Gen1
Table 2.5: CN20 (Main Board): M.2 B-Key Power Selection
PIN Description
1-2 short M.2 B-Key VCC = 3.8 V
1-2 NC M.2 B-Key VCC = 3.3 V (default)
Jumper cap part number 1653008397-01
Table 2.6: ERP1 (Main Board): Power Saving for ERP
PIN Description
1-2 ERP Disable (default)
3-4 ERP Enable
Table 2.7: J1 (I/O Board): COM1 RS232/422/485 Mode Selection
PIN Description
1-3 short
RS232 mode (default)
4-6 short
9 ARK-1221L User Manual