9. Jumpers and Connectors
PCI 762 – User’s Guide (Version 1.1)
9.3.12.
RS232/422/485 Pin Assignment (COM1)
The serial interface for the board consists of COM1 support for RS-232 and COM1 for RS-232/RS-422/RS-485.
Pin
Signal Name
RS-232
RS-422
RS-485
1
Data Carrier Detect (DCD)
TX-
DATA-
2
Data Set Ready (DSR)
No connector
No connector
3
Receive Data (RXD)
TX+
DATA+
4
Request to Send (RTS)
No connector
No connector
5
Transmit Data (TXD)
RX+
No connector
6
Clear to Send (CTS)
No connector
No connector
7
Data Terminal Ready (DTR)
RX-
No connector
8
Ring Indicator (RI)
No connector
No connector
9
Ground (GND)
GND
GND
10
Disconnect(NI)
NI
NI
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