Moxa MC-7210-MP-T [17/47] Connecting to a serial device

MC-7270-MP-T Series 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 support RS-232. COM3 and COM4 support RS-232,

RS-422, or RS-485. The AP from the CD can be used to configure both COM1 and COM2. For detailed

instructions, please refer to Appendix C. The pin assignments are shown in the following table:

DB9 Male Port RS-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, eight NMEA serial ports with terminal blocks 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.