
MGate W5108/W5208 Series
Quick Installation Guide
Edition 2.0, May 2017
Technical Support Contact Information
www.moxa.com/support
Moxa China (Shanghai office)
2017 Moxa Inc. All rights reserved.

- 2 -
Overview
The MGate W5108/W5208 series of gateways come with 1 or 2 serial
ports, making them an ideal choice for connecting Modbus/DNP3 serial
devices to a wireless LAN. With IEEE 802.11a/b/g/n support, you can use
fewer cables in difficult wiring environments, and for secure data
transmission, the MGate W5108/W5208 series gateways support
WEP/WPA/WPA2. The gateways’ rugged design makes them suitable for
industrial applications, including oil & gas, power plant, process
automation, and factory automation.
Package Checklist
Before installing the MGate W5108/W5208 gateway, verify that the
package contains the following items:
• 1 MGate W5108 or W5208 gateway
• 1 antenna
• Documentation and software CD
• Quick installation guide (printed)
• Warranty card
Optional Accessories
• Mini DB9F-to-TB Adapter: DB9 female to terminal block adapter
for RS-422/485 applications
• WK-51-01: Wall mounting kit
• DR-4524: 45W/2A DIN-rail 24 VDC power supply with universal 85
to 264 VAC input
• DR-75-24: 75W/3.2A DIN-rail 24 VDC power supply with universal
85 to 264 VAC input
• DR-120-24: 120W/5A DIN-rail 24 VDC power supply with 88 to 132
VAC or 176 to 264 VAC input, selected by DIP switch
Notify your sales representative if any of the above items are missing or
damaged.
Hardware Introduction
As shown in the following figures, the MGate W5108 has 1 DB9 port for
transmitting serial data, and the MGate W5208 has 2 DB9 ports for
transmitting serial data. The MGate W5108/W5208 gateways come with 2
kV serial port isolation protection built in.

- 4 -
Reset Button—Depress the Reset button continuously for 5 sec to load
factory defaults.
The reset button is used to load factory defaults. Depress the reset button
for five seconds using a pointed object, such as a straightened paper clip.
Release the reset button when the Ready LED stops blinking.
LED Indicators
Power is being supplied to the power input.
Power cable is not connected.
Steady on: Power is on and unit is functioning
normally.
Blinking: Unit is responding to DSU’s locate function.
Steady on: Power is on and the unit is booting up.
Blinking: IP conflict, DHCP, or BOOTP server did not
respond properly, or a relay output occurred.
Serial port is transmitting data.
Serial port is receiving data.
Data is not being transmitted.
Indicates a 100 Mbps Ethernet connection.
Indicates a 10 Mbps Ethernet connection.
Ethernet cable is disconnected.
Steady On: Unit is properly connected with the AP.
Blinking: Unit is trying to connect to the AP.
Indicates an IP conflict, or DHCP or BOOTP server is
not responding properly.
RF Green
3 LEDs = signal strength is between 67% and 100%.
2 LEDs = signal strength is between 34% and 66%.
1 LED = signal strength is between 0% and 33%.
Hardware Installation Procedure
After unpacking the unit, connect the power supply to the unit.
Use an Ethernet cable to connect the unit to the
Connect your device to the desired port on the unit.
Place or mount the unit. The unit may be placed on a
horizontal surface such as a desktop, or mounted on the wall.
wo metal plates are provided for mounting the unit
on a wall or inside a cabinet. Attach the plates to the
unit
’s rear panel with screws. With the plates
attached, use screws to mount the unit on a wall.
For each screw, the head should be 6.0 mm or less in
diameter, and the shaft should be 3.5 mm or less in
diameter.
Termination Resistor and Adjustable Pull High/Low Resistors
In some critical environments, you may need to add termination resistors
to prevent the reflection of serial signals. When using termination

- 5 -
resistors, it is important to set the pull high/low resistors correctly so that
the electrical signal is not corrupted. The MGate W5108/W5208 uses DIP
switches to set the pull high/low resistor values for each serial port.
To add a 120 Ω termination resistor, set switch 3 on the port’s
assigned DIP switch to ON; set switch 3 to OFF (the default setting) to
disable the termination resistor.
To set the pull high/low resistors to 150 KΩ, set switches 1 and 2 on
the port’s assigned DIP switch to OFF. This is the default setting.
To set the pull high/low resistors to 1 KΩ, set switches 1 and 2 on
the port’s assigned DIP switch to ON.
Pull High/low Resistors for the RS-485 Port
Software Installation Information
To configure your MGate W5108/W5208, connect the gateway’s Ethernet
port directly to your computer’s Ethernet port and then log in from a web
browser. The default IP address is 192.168.127.254. The MGate supports
two types of accounts: admin and user. The admin account can modify
all settings, whereas the user accounts can only view settings. The
default password for the admin account is “moxa”.
If you forget the modified IP address of the gateway or cannot log in to
the gateway via a web browser for any reason, you can access the
gateway via a direct Ethernet cable connection using the Device search
utility to search for the gateway.
To install Device Search Utility (DSU), insert the MGate
Documentation and Software CD into your PC’s CD-ROM drive, and
then run the following setup program to begin the installation process
from the “Software” directory:
dsu_setup_[Version]_Build_[DateTime].exe
The filename of the latest version may have the following format:
dsu_setup_Verx.x.x_Build_xxxxxxxx.exe.
For detailed information about DSU, refer to the MGate W5108/W5208
User’s Manual, which can be found in the “Document” directory.

- 6 -
Pin Assignments
RJ45 (LAN)
Rx+ 4 – 5 – 6 Rx- 7 – 8 –
DB9 Male (RS-232/422/485)
Pin RS-232
Power Input and Relay Output Pinouts
V2+ V2-
N.O. Common N.C.
DC Power

495 mA @ 9 V, 202 mA @ 24 V,
114 mA @ 48 V, 99 mA @ 60 V
0 to 60°C (32 to 140°F)
Wide temp. models:
-40 to 75°C (-40 to 167°F) for -T models
-40 to 85°C (-40 to 185°F)
45.8 x 105 x 134 mm (1.8 x 4.13 x 5.28 in)
MGate W5208:
59.6 x 101.7 x 134 mm (2.35 x 4.0 x 5.28 in)
1.5 kV for Ethernet,
2 kV for serial port
Regulatory Approvals FCC Class A, CE Class A, EN 60950-1,
Class 1 Division 2, ATEX, IECEx
3-pin circuit with current carrying capacity of
2 A @ 30 VDC
ATEX Information
1. Certificate number: DEMKO 16 ATEX 1641X
2. Certification string: Ex nA nC IIC T4 Gc
3. Standards covered:
EN 60079-0:2012+A11:2013, EN 60079-15:2010
4. The equipment shall be installed in an enclosure that provides a
degree of protection not less than IP54 in accordance with EN
60079-15 and accessible only by the use of a tool.
5. These products are for use in an area of not more than pollution
degree 2 in accordance with IEC 60664-1.