DA-660A Series HW UM
Hardware Connection Description
3-3
Connecting to the Network
Connect one end of the Ethernet cable to one of the 10/100M Ethernet ports (8-pin RJ45) on the computer
and the other end of the cable to the Ethernet network. If the cable is properly connected, the computer will
indicate a valid connection to the Ethernet in the following ways:
Pin
Signal
1
ETx+
2
ETx-
3
ERx+
4
–
5
–
6
ERx-
7
–
8
–
Connecting to a Serial Device
Use properly wired serial cables to connect the DA-660A to serial devices. The serial ports (P1 to P16) on
the DA-660A use 8-pin RJ45 connectors. The ports can be configured by software for RS-232, RS-422, or 2-
wire RS-485. The pin assignments are shown in the following table:
Pin
RS-232
RS-232
(DA-660A-I-8/16-LX only)
RS-422/
RS-482-4w
RS-485-2w
1
DSR
–
–
–
2
RTS
RTS
TXD+
–
3
GND
GND
GND
GND
4
TXD
TXD
TXD-
–
5
RXD
RXD
RXD+
Data+
6
DCD
–
RXD-
Data-
7
CTS
CTS
–
–
8
DTR
–
–
–
