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Digi One EM Hardware Reference 15
DB-9 Serial Interface (P1)
The following figure helps you locate specific DB-9 pins and
the table maps signals to pins.
Pin Signal
1 Data Carrier Detect (DCD)
2 Receive Data (RxD)
3 Transmit Data (TxD)
4 Data Terminal Ready (DTR)
5 Signal/Chassis Ground (GND)
6 Data Set Ready (DSR)
7 Request To Send (RTS)
8 Clear To Send (CTS)
9 Unused
Pin1
Pin5
Pin6
Pin9