Moxa DA-681A-I-SP [21/46] Connecting a serial device

DA-681A Series Hardware Hardware Installation

2-10

Connecting a Serial Device

The DA-681A has two 3-in-1 RS/232/422/485 serial ports, and 10 RS-485 ports. When the cable is properly

connected, the LEDs on the front panel will glow to indicate a proper connection.

DB9 Pin A

ssignment

Terminal Block Pin Assignment

Pin RS-232 RS-485 (4W) RS-485 (2W) RS-422

1 DCD TxD-(A) – TxD-(A)

2 RXD TxD+(B) – TxD+(B)

3 TXD RxD+(B) Data+(B) RxD+(B)

4 DTR RxD-(A) Data-(A) RxD-(A)

5 GND GND GND GND

6 DSR – – –

7 RTS – – –

8 CTS – – –

9 – – – –

LED Color Description

Serial Port TX 1-12 Green Serial port is transmitting data

Off No operation

Serial Port RX 1-12 Yellow Serial port is Receiving data

Off No operation

LAN Ports

The DA-681A has 6 10/100/1000 Mbps LAN ports. The pin assignments are shown below.

Pin No. 10/100 Mbps 1000 Mbps

1 TX+ TRD(0)+

2 TX- TRD(0)-

3 RX+ TRD(1)+

4 – TRD(2)+

5 – TRD(2)-

6 RX- TRD(1)-

7 – TRD(3)+

8 – TRD(3)-