Moxa MC-5157-DC [16/56] Connecting to a serial device

MC-5150-AC/DC Hardware Connection Description

3-4

Pin 10/100 Mbps 1000 Mbps

1 ETx+ TRD(0)+

2 ETx- TRD(0)-

3 ERx+ TRD(1)+

4 --- TRD(2)+

5 --- TRD(2)-

6 ERx- TRD(1)-

7 --- TRD(3)+

8 --- TRD(3)-

Connecting to a Serial Device

The serial ports use DB9 connectors. COM1 and COM2 can run with RS-232, RS-422, or RS-485, and COM3 and

COM4 run with RS-232. The pin assignments are shown in the following table:

DB9 Male

Port

-232/422/485 Pinouts

Pin RS-232 RS-422 RS-485

(4-wire)

RS-485

(2-wire)

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 – – –

Additionally, 8 NMEA serial ports with Phoenix 3.81 mm compatible connectors are also available on the rear

panel of the computer. Refer to the following figures for the location of the NMEA ports and the pin

assignments.

Connecting a PS/2 Keyboard and Mouse

Your MC-5157-AC/DC computer comes with 2 PS/2 mini-DIN connectors on the rear panel to connect to a PS/2

keyboard and PS/2 mouse. This 6-pin mini-DIN connector has the pin assignments shown below.