NEC
Solutions
(America),
Inc.
Visual Systems
LT240 Installation Guide
Desktop and Ceiling Mount
v3.0
www.necvisualsystems.com
Page 7 of 7
Control Codes
Function
Code
Data
POWER
ON
02H 00H 00H
00H
00H
02H
POWER
OFF
02H
01H
00H
00H
00H
03H
INPUT SELECT RGB 1
02H
03H
00H
00H
02H
01H
01H
09H
INPUT SELECT RGB 2
02H
03H
00H
00H
02H
01H
02H
0AH
INPUT SELECT VIDEO
02H
03H
00H
00H
02H
01H
06H
0EH
INPUT SELECT S-VIDEO
02H
03H
00H
00H
02H
01H
0BH 13H
INPUT SELECT VIEWER
02H
03H
00H
00H
02H
01H
1FH
27H
PICTURE
MUTE
ON
02H
10H
00H
00H
00H
12H
PICTURE
MUTE
OFF
02H
11H
00H
00H
00H
13H
SOUND
MUTE
ON
02H
12H
00H
00H
00H
14H
SOUND
MUTE
OFF
02H
13H
00H
00H
00H
15H
ON
SCREEN
MUTE
ON
02H
14H
00H
00H
00H
16H
ON
SCREEN
MUTE
OFF
02H
15H
00H
00H
00H
17H
Cable Connection
Communication Protocol:
Baud Rate:
38400 bps
Data Length:
8 bits
Parity:
No
Parity
Stop Bit:
One bit
X
on/off: None
Communications: Full duplex
PC Control Connector (DIN-8P)
To RxD of PC
1
2
3
4
5
6
7
8
To TxD of PC
To GND of PC
NOTE 1:
It is recommended to set the projector to “Idle Mode” in the Setup menu for best Power ON response.
NOTE 2:
Pins 2, 3, 5, 6 and 8 are used inside the projector.
NOTE 3:
For long cable runs it is recommended to set communication speed within projector menus to 9600 bps.
