NEC Display Solutions of America, Inc.
P451X/P501X Installation Guide
Ceiling Mounted and Desktop
Rev 1.0
www.necdisplay.com
P451X/P501X
Page 6 of 6
Input / Output Panel
PC Control Codes
Function
Code Data
POWER ON
02H
00H
00H
00H
00H
02H
POWER OFF
02H
01H
00H
00H
00H
03H
INPUT SELECT COMPUTER1
02H
03H
00H
00H
02H
01H
01H
09H
INPUT SELECT HDMI1
02H
03H
00H
00H
02H
01H
1AH
22H
INPUT SELECT HDMI2
02H
03H
00H
00H
02H
01H
1BH
23H
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
INPUT SELECT NETWORK
02H
03H
00H
00H
02H
01H
20H
28H
INPUT SELECT USB DISPLAY
02H
03H
00H
00H
02H
01H
22H
2AH
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
PROJECTOR INFORMATION REQUEST
00H
BFH 00H
00H
01H
02H
C2H
ERROR STATUS REQUEST
00H
88H
00H
00H
00H
88H
INFORMATION REQUEST
03H
8AH 00H
00H
00H
8DH
Note:
Contact your NEC rep for codes not listed.
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 (D-Sub 9P
)
NOTE 1 :
Pins 1, 4, 6, and 9 are used inside the projector.
NOTE 2:
For long cable runs it is recommended to set communication speed within the projector to 9600 bps.
NOTE 3:
Jumper “Request to Send” and “Clear to Send” together on both ends of the cable to simplify cable connection.
1
2
3
4
5
6
7
8
9
To GND of PC
To RxD of PC
To TxD of PC
To CTS of PC
To RTS of PC
