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17
Chapter 4 Jumper Settings
Chapter 4
Panel Power Select
1-2 On: +12V
1
3
5
2
4
6
3-4 On: +5V
1
3
5
2
4
6
5-6 On: +3.3V
(default)
1
3
5
2
4
6
JP9
JP9 is used to select the power supplied to the LCD panel.
Important:
Before powering-on the system, make sure JP9’s setting matches the LCD panel’s
specification. Selecting the incorrect voltage will seriously damage the LCD panel.
COM1/COM2 RS232/RS422/RS485 Select
JP4 (for COM1) and JP13 (for COM2) are used to configure the COM ports to RS232, RS422
(Full Duplex) or RS485.
The pin function of the COM ports will vary according to the jumper’s setting.
JP4/JP13
5-6 On: RS485
6
4
2
5
3
1
COM 2
JP4
JP13
RS232
RS422
Full Duplex
RS485
COM 1
DCD-
TD
RD
D
TR-
GND
1 2 3 4 5
RT
S-
RI-
DSR
-
CT
S-
6 7
8
9
6
4
2
5
3
1
1-2 On: RS232
(default)
3-4 On: RS422
Full Duplex
6
4
2
5
3
1
COM 1
RXD+
TXD+
RXD-
TXD- N.C.
1 2 3 4 5
6 7
8
9
N.C. N.C. N.C. N.C.
D
ATA
+
D
ATA
-
N.C. N.C. N.C. N.C.
6 7
8
9
1 2 3 4 5
N.C.
N.C.
N.C.