Moxa EM-1220-LX [18/19] Console ports and pin assignments

Product Name EM-1220-DK Functionality

3-4

Male DB9 Port

Pin RS-232 RS-422

4-wire

RS-485

2-wire

RS-485

1 DCD TxDA(-) TxDA(-) ---

2 RxD TxDB(+) TxDB(+) ---

3 TxD RxDB(+) RxDB(+) DataB(+)

4 DTR RxDA(-) RxDA(-) DataA(-)

5 GND GND GND GND

6 DSR --- --- ---

7 RTS --- --- ---

8 CTS --- --- ---

Console Ports and Pin Assignments

The serial console port on the EM-1220-DK is a 4-pin pin-header RS-232 port, which support TxD, RxD, and

GND signals. It is designed for serial console terminals, which can be used for local configuration and

identifying the EM-1220-LX boot up message. The pinouts of this RS-232 console port are shown in the figure

below.

Serial Console Port & Pinouts Serial Console Cable

Pin Signal

1 TxD

2 RxD

3 NC

4 GND

LAN Ports and Pin Assignments

The EM-1220 Development Kit has two 10/100 Mbps LAN ports. Connect one end of the Ethernet cable to the

Development Kit LAN port and the other end of the cable to the Ethernet network. The LAN ports use 8-pin RJ45

connectors. See the following diagram for the pinouts.

8-pin RJ45

Pin Signal

1 ETx+

2 ETx-

3 ERx+

4 ---

5 ---

6 ERx-

7 ---

8 ---