Delta Electronics DOP-B

English-5

COM2 Port (Supports Flow Control)

MODE1 MODE2 MODE3

COM Port PIN RS-232 RS-422 RS-485

1 TXD+ D+

2 RXD

3 TXD

4 RXD+

5 GND GND GND

6 TXD- D-

7 RTS

8 CTS

9 RXD-

Note1: Blank = No Connection.

Note2: When COM2 port is used for RS-232 flow control, i.e. RTS and CTS signals are used for flow control,

COM3 port will become incapable of being used.

Note3: When COM2 port is used for RS-422 flow control, please refer to the following COM3 Port signals table

for pin assignments. The signals, RTS+, CTS+, RTS- and CTS- shown in brackets are the signals used

for flow control.

COM3 Port

MODE1 MODE2 MODE3

COM Port PIN RS-232 RS-422 RS-485

1 TXD+(RTS+) D+

2 RXD

3 TXD

4 RXD+(CTS+)

5 GND GND GND

6 TXD-(RTS-) D-

9 RXD-(CTS-)

Note1: Blank = No Connection.

Note2: When COM2 port is used for RS-422 flow control, please refer to the COM3 Port signals table above for

pin assignments. The signals, RTS+, CTS+, RTS- and CTS- shown in brackets are the signals used for

flow control.

Ethernet Interface (LAN)

Contact

Ethernet Interface (LAN) PIN Ethernet

1 TX+

2 TX-

3 RX+

6 RX-

Note: Blank = No Connection.

PIN1