ADLINK C485 - Manual (Page 47)

Expansion/Isolation Box User Guide
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3.2 Pin Definition / DIP Switch Setting
The pin definition for F641 box DB25 male connector.
Pin No. Signal Name
1 Frame Ground
2 Transmit Data Out
3 Receive Data In
4 RTS Out
5 CTS In
6 DSR In
7 Signal Ground
8 DCD In
20 DTR Out
The pin definition for F642 box DB25 male connector.
Pin No. Signal Name
1 Frame Ground
7 Signal Ground
9 RTD+
10 RTD-
11 TXD+
12 TXD-
The pin definition for RS-232 DB25 male connector.
Pin No. RS-232 Mode Signal Name
2 TXD (Out)
3 RXD (In)
4 RTS (Out)
5 CTS (In)
6 DSR (In)
7 GND
8 DCD (In)
20 DTR (Out)