Moxa MD-119-X1 [13/44] Connecting data transmission cables

MD-124 HW Manual Hardware Installation and Peripherals

3-3

Connecting Power Sources

The MD-119 offers 24 VDC power input with the terminal block, and also comes with a 110 to 230 VAC power

input. If power is supplied properly, the Power LED will light up. To enable the power failover function, connect

both AC and DC power inputs.

For safety reasons, please use cables with the following specifications:

Wire range: 14-22 AWG, torque 7 lb

Grounding the MD-119

Grounding and proper wiring layout help limit the effects of noise from electromagnetic interference (EMI). The

ground wire must be a minimum 18 AWG, and must be connected (via the grounding screw) prior to connecting

the power. The ground connector is located on the bottom panel of the display, as shown in the Appearance

and Layout diagram on page 2-2.

ATTENTION

This product is intended to

be mounted to a well-grounded mounting surface, such as a metal panel.

Connecting Data Transmission Cables

This section describes how to connect the MD-119 display to various interfaces.

Connecting to a Serial Device

Use a serial cable to plug your serial device into the display’s serial port. Please note that serial port 1 is

reserved for the manufacturer’s configuration process; only serial port 2 is available for connecting serial

perhipherals. Serial port 2 terminates in a male 9-pin D-Sub (DE9) connector, and can be software-configured

as an RS-232, RS-422, or RS-485 interface. The pin assignments are shown in the table on the following page:

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(+) –

TxD

RxDB(+)

DataB(+)

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

5 GND GND GND GND

6 DSR – – –

7 RTS – – –

8 CTS – – –