NEC PE455UL User Manual page 158

USB Port (Type A)
1
2
3
4
PC CONTROL Port (D-Sub 9 Pin)
9 8 7 6
5 4 3 2 1
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
138
9. Appendix
Signal
Signal