6 MB820 User’s Manual
Setting the Jumpers
Jumpers are used on MB820 to select various settings and features
according to your needs and applications. Contact your supplier if you
have doubts about the best configuration for your needs. The following
lists the connectors on MB820 and their respective functions.
Jumper Locations on MB820.............................................................7
JP1: RS232/422/485 (COM2) Selection..........................................8
JP2: COM1 RS232 +5V/+12V Power Setting.................................8
JP3: COM2 RS232 +5V/+12V Power Setting.................................8
JP4: Clear CMOS Contents................................................................9
JP5: COM3 RS232 +5V/+12V Power Setting.................................9
JP6: COM4 RS232 +5V/+12V Power Setting.................................9
JP7: DiskOnChip Address Select.....................................................10
JP8: Onboard VGA Enable/Disable.................................................10
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