Avalue ARC-1209 - Manual (Page 21)

Quick Reference Guide
ARC-1209 Quick Reference Guide 21
2.6.5 Serial port 1 in RS-422/485 mode (JP1)
* Default
PIN Signal PIN Signal PIN Signal
1 NDCDA# 2 COM1-1 3 485_422TX1-
4 NRXDA 5 COM1-2 6 485_422TX1+
7 NTXDA 8 COM1-3 9 422RX1+
10 NDTRA# 11 COM1-4 12 422RX1-
2.6.6 LCD Inverter connector (JBKL1)
Signal PIN
+12V 1
GND 2
BKLEN 3
VBRIGHT 4
+5V 5
Note:
For inverters with adjustable Backlight function, it is possible to control the LCD brightness through
the VR signal controlled by JVR. Please see the JVR section for detailed circuitry information.