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ASUS SD433 User Guide

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2-2
Chapter 2: Setup
2.1.3 
Connecting External Speakers
MENU
EXIT
HDMI
Audio out
5V DC OUT
RS232-out
RS232-in
2.1.4 
Display Control Connection
a.  Connect one end of the RS-232 cable to your computer's RS232 
port. Then connect the other end of the RS-232 cable to the 
display's RS232-in port.
b.  Using another RS-232 cable, connect one end of the RS-232 
cable to the display's RS232-out port. Then connect the other end 
of the RS-232 cable to the second display's RS232-in port. Refer 
to the illustration below:
Display 1
Display 2
PC
[RS232] [RS232-IN] [RS232-OUT]
[RS232-IN]
c.  Repeat Step b to connect additional displays.