Digi 90000278_B - Manual (Page 15)

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
Pin 1
Pin 5
Pin 6
Pin 9