ADLINK C485 User Manual
Page 48
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• Expansion/Isolation Box User Guide
The pin definition for RS-422/485 DB25 male connector.
Pin No.
RS-422/485 Mode Signal Name
2
TXD+ (Out)
3
RXD+ (In)
4
RTS+ (Out)
5
CTS+ (In)
7
GND
13
RTS- (Out)
14
TXD- (Out)
16
RXD- (In)
19
CTS- (In)
RS-485 mode may let pin 2 and pin 3, pin 14 and pin 16 short together to
connect with other device.
We have 120-ohm terminator resistor built in each input signal pair. In
RS-485 mode, you may need to remove this terminator resistor.
Mode setting for C584XB/C588XB
DIP Switch Bit 1,3,5,7 DIP Switch Bit 2,4,6,8
Interface Mode
ON
ON
RS-232
ON
OFF
RS-232
OFF
ON
RS-422
OFF
OFF
RS-485
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