Optoma Optoma TXR774 - Manual (Page 60)

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60
RS232 Commands
RS232 VGA-In Connector
Pin No Name I/O (From Projector Side)
1 NC _
2 RXD IN
3 TXD OUT
4 NC _
5 NC _
6 NC _
7 RS232 RTS
8 RS232 CTS
9 NC _
Appendices