NEC P452H User Manual page 146

Ethernet/HDBaseT/LAN Port (RJ-45)
1 2 3 4 5 6 7 8
USB Port (Type A)
1
2
3
4
PC CONTROL Port (D-Sub 9 Pin)
9 8 7 6
4 3 2 1
5
Communications protocol
Pin No.
1 TxD+/HDBT0+
2 TxD−/HDBT0−
3 RxD+/HDBT1+
4 Disconnection/HDBT2+
5 Disconnection/HDBT2−
6 RxD−/HDBT1−
7 Disconnection/HDBT3+
8 Disconnection/HDBT3−
Pin No.
1 V
BUS
2 D−
3 D+
4 Grounding
Pin No.
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
135
Signal
Signal
Signal
9. Appendix