Comtrol RocketPort 550 uPCI MS-DOS - Manual (Page 14)

14
BroadPort 550 IF DB9 signals
DB9 Pin RS422 signal
(Tributary)
RS422 signal
(BUS controller)
1 Frame Ground Frame Ground
6 GND (TxD signal common ) GND (RxD signal common )
2 TxD_A RxD_A
7 TxD_B RxD_B
3 RxD_B TxD_B
8 RxD_A TxD_A
4 GND ( RxD signal common) GND ( TxD signal common)
9 Frame ground Frame ground
5 N/A N/A