COMMELL P4LA - Manual (Page 14)

P4LA User’s Manual Introduction
Jumper Reference 14
2.2 <Jumper Reference>
Jumper Function
JRTC CMOS Operating/Clear Setting
JCFSEL Compact Flash Address Setting
JCSEL1 Setting RS232/422/485
JCSEL2 Setting RS232/422/485
JDOC Setting address
JP1 Setting COM Port Voltage
JP2 Setting COM Port Voltage
JRTC
JCSEL2
JCFSEL JP2 JCSEL1
JDOC
JP1