IEI Technology DRPC-330-A7K Series, User Manual

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DRPC-330-A7K Embedded System
Page 22
3.6 RS-232/422/485 Serial Port Connection
The DRPC-330-A7K has two D-sub 9 male connectors with 2.5kV isolation for
RS-232/422/485 connection. The pinouts of the D-sub 9 connectors are listed below.
PIN NO. RS-232 RS-422 RS-485
1 DCD TX- TX-
2 RX TX+ TX+
3 TX RX+
4 DTR RX-
5 GND
6 DSR
7 RTS
8 CTS
9 RI
Table 3-1: RS-232/422/485 Connector Pinouts
3.7 RS-232 Serial Port Connection
The DRPC-330-A7K has two DB-9 connectors with 2.5kV isolation for RS-232 connection.
The pinouts of the DB-9 connectors are listed below.
PIN NO. RS-232
1 DATA CARRIER DETECT (DCD)
2 RECEIVE DATA (RXD)
3 TRANSMIT DATA (TXD)
4 DATA TERMINAL READY (DTR)
5 GROUND (GND)
6 DATA SET READY (DSR)
7 REQUEST TO SEND (RTS)
8 CLEAR TO SEND (CTS)
9 RING INDICATOR (RI)
Table 3-2: RS-232 DB-9 Connector Pinouts