ADLINK PCI-C588/PCIe-C588/C584 User Manual
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• Connectors
4.1.8 RS422/485 DB25/DB9 Male Connector Pin assignment - C518/C514
=========================================================
DB25 Pin Number | DB9 Pin Number | Signal Name
=========================================================
2 | 3 | 422TXD+ (Out)
---------------------------------------------------------
3 | 2 | 422RXD+ (In )
---------------------------------------------------------
4 | 7 | 422RTS+ (Out)
---------------------------------------------------------
5 | 8 | 422CTS+ (In )
---------------------------------------------------------
7 | 5 | GND
---------------------------------------------------------
13 | 9 | 422RTS- (Out)
---------------------------------------------------------
14 | 6 | 422TXD- (Out)
---------------------------------------------------------
16 | 4 | 422RXD- (In )
---------------------------------------------------------
19 | 1 | 422CTS- (In )
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NOTE: RS422/485 ports have fully isolated ground references with other
RS232 ports.