Avalue EPI-QM87R - Manual (Page 29)

User’s Manual
EPI-QM87R/ EPI-QM87 User ’s Manual 29
2.4.14 Serial Port 1/2 RS-422-485 mode (J422_1 / J422_2)
Signal PIN PIN Signal
485_422TX1- 2 1 422RX1-
485_422TX1+ 4 3 422RX1+
+5V 6 5 GND
Note:
J422/485 is available after modify the mode of
COM1/2 in BIOS setting
2.4.15 LCD Inverter Connector (JBKL)
Signal PIN
+12V 1
GND 2
BKLEN 3
VBRIGHT 4
+5V 5
2.4.15.1 Signal Description – LCD Inverter Connector (JBKL)
Signal Signal Description
VBRIGHT Vadj = 0.75V ~ 4.25V ( Recommended: 4.7KΩ, >1/16W)
BKLEN LCD backlight ON/OFF control signal
J422_2 J422_1