Ricoh PJ WU6181N 6200-Lumen WUXGA LCD Projector (No Lens) - Manual (Page 259)

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10. Appendix
Ethernet Port (RJ-45)
1 2 3 4 5 6 7 8
Pin No. Signal
1 TxD+
2 TxD−
3 RxD+
4 Disconnection
5 Disconnection
6 RxD−
7 Disconnection
8 Disconnection
USB-A Port (Type A)
1
3
2
4
Pin No. Signal
1 V
BUS
2 D−
3 D+
4 Grounding
PC CONTROL Port (D-Sub 9 Pin)
1 2 3 4 5
6 7 8 9
Communications protocol
Pin No. Signal
1 Unused
2 RxD reception data
3 TxD transmission data
4 Unused
5 Grounding
6 Unused
7 RTS transmission request
8 CTS transmission allowed
9 Unused