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Reference: RS-232 Display Panel Requirements
DB9
Male
LG monitors/displays listed below require an RS-232
serial null-modem DB9 cable with female connectors at
each end.
3-Wire Configuration
(serial Female-Female null-modem cable)
RS-232 Null Configuration
DISPLAY CONTROL RS-232 Pin Confi guration
(DB9 Male)
NC 1
RXD 2
TXD 3
NC 4
GND 5
NC 6
NC 7
NC 8
NC 9
STB1000
DB9
Male
Compatible Monitors/
Displays:
• M3203CCBA
• M3204C
• LD350C series
• LD450C series
• 55LD520C
• LG30DC series
• LG50DC series
• 22LH200C
• 26LH210C
• LH300C series
• 52LH400C
• PJ350C series
• PK550C series
• PQ30C series
• 50/60PS60C
1 NC
2 RXD
3 TXD
4 NC
5 GND
6 NC
7 NC
8 NC
9 NC
Display
Panel
Null-
modem
Cable
Pin Number Description
1 No Connection
2 RXD (Receive Data)
3 TXD (Transmit Data)
4 No Connection
5 GND
6 No Connection
7 No Connection
8 No Connection
9 No Connection
DB9
Female
Some LG monitors/displays may require
an RS-232 straight-through DB9 cable
with a male connector on one end and
a female connector on the other end.
Please contact LG for information on
compatibility.
3-Wire Configuration
(straight-through Female-Male cable)
RS-232 Straight Configuration
DB9
Male
12345
6789
NC 1
RXD 2
TXD 3
NC 4
GND 5
NC 6
NC 7
NC 8
NC 9
STB1000
1 NC
3 TXD
2 RXD
4 NC
5 GND
6 NC
7 NC
8 NC
9 NC
Display
Panel
Straight-
through
or
Extension
Cable