Epson JED T440 user manual Solder side

RS232 connections to Optoma Group 2: EP776, EP782 projector with D9

These use a 9-pin-D9 male on the proj, female on cable. Comms is at 9600 baud, 8 bits, no parity, 1 stop.

Function/Direction	T440 “projector”	“Serial” Port Connector
	Connection			1	2		3	4 5
Ground	Ground	9-pin D-sub pin 5			6	7	8	9
Data from T440 to projector	Tx	9-pin D-sub pin 2	(RXD)	D-sub 9 female
Reply data from projector to T440	Rx	9-pin D-sub pin 3	(TXD)		solder side
Plus 9 volt CTS/DTR to projector	n/c	n/c

After installation wiring of any projector to a T440, use a multimeter to check voltages of –9 on BOTH TX and RX pins in any installation, as described in the troubleshooting part of this manual.

T440 Users manual V021/B, © JED Microprocessors Pty Ltd Nov 17th 2008 Page 17