NEC VT491 NEC Display Solutions of America, Inc, Input Panel, PC Control Codes, Cable Connection

	NEC Display Solutions of America, Inc.
VT491/590/595 Installation Guide
Ceiling Mounted and Desktop	Rev 1.3
Input Panel

S-VIDEO	L
IN
+	+

R

VIDEO IN AUDIO IN

VT595

PC CONTROL COMPUTER2(DVI-I) INAUDIO IN COMPUTER1 IN

AUDIO OUT MONITOR OUT

VT490 / VT590

S-VIDEO	L	PC CONTROL	MONITOR OUT
IN
+	+
VIDEO IN	R
	AUDIO IN

PC Control Codes

COMPUTER IN

Function	Code Data
POWER ON	02H	00H	00H	00H	00H	02H
POWER OFF	02H	01H	00H	00H	00H	03H
INPUT SELECT COMPUTER	02H	03H	00H	00H	02H	01H	01H	09H
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 DVI (DIGITAL)	02H	03H	00H	00H	02H	01H	1AH	22H
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

NOTE 1 : Pins 2, 3, 5, and 6 are used inside the projector.

NOTE 2: For long cable runs it is recommended to set communication speed within the projector to 9600 bps.

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