
– 1 – – 2 – – 3 –
P/N: 1802031700014
MGate MB3170 and MB3270
Quick Installation Guide
Seventh Edition, July 2015
Overview
The MGate MB3170 and MB3270 are 1 and 2-port advanced
Modbus gateways that convert between Modbus TCP and Modbus
ASCII/RTU protocols. They can be used to allow Ethernet masters
to control serial slaves, or to allow serial masters to control
Ethernet slaves. Up to 16 TCP masters and 31 serial slaves can be
connected simultaneously.
Package Checklist
Before installing the MGate MB3170 or MB3270, verify that the
package contains the following items:
• MGate MB3170 or MB3270 Modbus gateway
• Document & Software CD
• Quick Installation Guide
• Product Warranty Statement
Optional Accessories:
• DK-35A: DIN-rail mounting kit (35 mm)
• Mini DB9F-to-TB Adaptor: DB9 female to terminal block
adapter
• 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/176 to 264 VAC input by switch
Please notify your sales representative if any of the above items is
missing or damaged.
Hardware Introduction
LED Indicators
Power is being supplied to the power input
Power is being supplied to the power input
Steady: Power is on and the unit is booting up
Blinking: IP conflict, DHCP or BOOTP server did
not respond properly, or a relay output
Steady: Power is on and the unit is functioning
normally
Blinking: Unit is responding to locate function
Power is off or power error condition exists
10 Mbps Ethernet connection
100 Mbps Ethernet connection
Ethernet cable is disconnected or has a short
Serial port is receiving data
Serial port is transmitting data
Serial port is not transmitting or receiving data
Steady on: Ethernet fiber connection, but port
is idle.
Blinking: Fiber port is transmitting or receiving
data.
Reset Button
Press the Reset button continuously for 5 sec to load factory
defaults:
The reset button is used to load factory defaults. Use a pointed
object such as a straightened paper clip to hold the reset button
down for five seconds. Release the reset button when the Ready
LED stops blinking.
Panel Layouts
The MGate MB3170 has a male DB9 port and a terminal block for
connecting to serial devices. The MGate MB3270 has two DB9
connectors for connecting to serial devices.

+1-714-528-6777 (toll-free: 1-888-669-2872)
+86-21-5258-9955 (toll-free: 800-820-5036)
2015 Moxa Inc. All rights reserved.
Hardware Installation Procedure
Use a standard straight-through Ethernet (fiber) cable to
connect the unit to a network hub or switch.
Connect your device to the unit's serial port.
Mount the unit on a DIN-rail.
Connect the power source to power input.
Software Installation Information
To install MGate Manager, 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:
MGM_Setup_[Version]_Build_[DateTime].exe
The filename of the latest version may have the following format:
MGM_Setup_Verx.x.x_Build_xxxxxxxx.exe.
For detailed information about MGate Manager, refer to the MGate
MB3000 User's Manual, which can be found in the "Document"
directory.
Pin Assignments
Ethernet Port (RJ45)
Serial Port (Terminal Block)
Pin
Power Input and Relay Output Pinouts
V2+ V2-
V1+ V1-
a. 50/125 μm, 800 MHz*km fiber opti c cable
b. 62.5/125 μm, 500 MHz*km fiber op tic cable
c. 9/125 μm, 3.5 PS/(nm*km) fiber optic cable
435 mA @ 12 V, 218 mA @ 24 V,
109 mA @ 48 V
555 mA @ 12 V, 278 mA @ 24 V,
138 mA @ 48 V
435 mA @ 12 V, 218 mA @ 24 V,
109 mA @ 48 V
510 mA @ 12 V, 255 mA @ 24 V,
128 mA @ 48 V
0 to 60°C (32 to 140°F),
-40 to 75°C (-40 to 167°F) for –T model
-40 to 85°C (-40 to 185°F)
Magnetic Isolation
Protection (serial)
29 x 89.2 x 118.5 mm
(1.14 x 3.51 x 4.67 in)
29 x 89.2 x 124.5 mm
(1.14 x 3.51 x 4.90 in)
1 digital relay output to alarm (normal
close
): current carrying capacity 1 A @
UL/cUL Class 1 Division 2 Group
A/B/C/D, ATEX Zone 2, IECEx
ATEX and IECEx Information
1. DEMKO Certification number: 07 ATEX 0690059X IEC
Certification Number: IECEx UL 13.0023X (only for models with
suffix –CT or –IEX)
2. Ambient Temperature Range (-40°C ≤ Tamb ≤ 75°C)
3.
Certification String: Ex nA IIC T3 Gc
Standards Covered: EN 60079-0:2012/IEC 60079-0 6th Ed.
AND EN 60079-15:2010/IEC 60079-15 4th Ed.
The conditions of safe usage:
• The Ethernet Communications Devices are intended for
mounting in a tool-accessible IP54 enclosure and used in
an area of not more than pollution degree
IEC 60664-1.
• Conductors suitable for use in an ambient temperature
greater than 114°C must be used for the power supply
terminal.
• A 4mm2 conductor must be used when connection to the
external grounding screw is utilized.
• Provisions shall be made, either in the equipment or
external to the equipment, to prevent the peak rated
voltage being exceeded by the transient disturbances of