Moxa MD-124X [13/33] Connecting power sources

MD-124 HW Manual Hardware Installation and Peripherals

3-3

NOTE

To avoid inte

rference, do not run signal or communication wiring together with power wiring in the same

conduit. Wires with different signal characteristics should be routed separately.

• Use the type of signal transmitted through a wire to determine which wires should be kept separate. The

rule of thumb is that wiring that shares similar electrical characteristics can be bundled together.

• Keep input wiring and output wiring separate.

• It is advisable to label the wiring to all devices in the system.

ATTENTION

Safety First!

Be sure to disconnect the power cord before installing and/or wiring your MD

-124.

Wiring Caution!

Calculate the maximum possible current in each power wire and common wire. Observe all electrical codes

dictating the

maximum current allowable for each wire size.

If electrical current exceeds the maximum rating the wire will overheat; this will cause serious damage to your

equipment.

Temperature Caution!

Be careful when handling the unit. When the unit is plugged in, the internal components generate a lot of heat,

heating the outer casing.

Connecting Power Sources

The MD-124 offers 18 to 36 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. The OS is ready when the Ready LED

glows a solid green.

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

Wire range: 14-22 AWG, torque 7 lb

Grounding the MD-124

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

the ground connection from the ground screw to the grounding surface prior to connecting the power. The

ground connector is located on the bottom panel of the display.

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-124 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: