MOXA MGate MB3280 Series 1-2-and 4-Port Standard Serial-to-Ethernet Modbus Gateways Installation Guide
- June 6, 2024
- MOXA
Table of Contents
MGate MB3280 Series
Quick Installation Guide
Version 4.2, January 2021
@ 2021 Moxa Inc. All rights reserved.
Overview
The MGate MB3280 is a 2-port Modbus gateway that converts between Modbus TCP and Modbus ASCII/RTU protocols. It 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 62 serial slaves can be connected simultaneously.
Package Checklist
Before installing the MGate MB3280 Modbus gateway, verify that the package contains the following items:
- 1 MGate MB3280 Modbus gateway
- Power adapter
- 4 Stick-on pads
- Quick installation guide (printed)
- Warranty card
Optional Accessory
- DK-35A: DIN-rail mounting kit (35 mm)
- Mini DB9F-to-TB Adapter: DB9 female to terminal block adapter
Notify your sales representative if any of the above items are missing or damaged.
NOTE This product is designed to be powered by a listed power source
marked “LPS” and is rated 12 to 48 VDC and 0.25 A minimum.
The device’s operating temperature when using the power adapter is 0 to 40°C
(32 to 104°F), and 0 to 60°C (32 to 140°F) when using an alternative DC power
source. If you need additional assistance purchasing a power source, please
contact Moxa for more information.
Hardware Introduction
As shown in the following figures, the MGate MB3280 has two DB9 male ports for transmitting serial data.
Reset Button —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
in order to load the factory defaults.
LED Indicators —Four LED indicators are located on the top panel:
| Name | Color | Function |
|---|---|---|
| Ready | Red | Steady on: |
| Blinking: | IP conflict exists, or the DHCP or BOOTP server is not responding |
properly.
Green| Steady on:| The power is on and the unit is functioning normally.
Blinking:| The unit has been found by the Location command in MGate Manager.
Off| Power is off or power error condition exists.
Ethernet| Orange| 10 Mbps Ethernet connection.
Green| 100 Mbps Ethernet connection.
Off| The Ethernet cable is disconnected or has a short.
P1/P2| Orange| The unit is receiving data from the device.
Green| The unit is transmitting data to the device.
Off| No data is being exchanged with the device.
Hardware Installation Procedure
STEP 1 : After unpacking the MGate MB3280, connect the power adapter.
Make sure that the adapter is connected to an earthed socket outlet.
STEP 2: Use a standard straight-through Ethernet cable to connect the
MGate MB3280 to a network hub or switch. Use a cross-over Ethernet cable if
you are connecting the gateway directly to a PC.
STEP 3: Connect your device(s) to the MGate MB3280’s serial port.
STEP 4: Place or mount the MGate MB3280. The unit may be placed on a
horizontal surface such as a desktop, mounted on a DIN rail, or mounted on the
wall.
Wall or Cabinet Mounting
Mounting the MGate MB3280 onto a wall requires two screws. The head of the
screws should be 5.0 to 7.0 mm in diameter, the shaft should be 3.0 to 4.0 mm
in diameter, and the length of the screws should be at least 10.5 mm.
DIN-rail Mounting
DIN rail attachments can be purchased separately to mount the MGate MB3280 on
a DIN rail.
Termination Resistor and Adjustable Pull High/Low Resistors
For some RS-485 environments, you may need to add termination resistors to
prevent the reflection of serial signals. When using termination resistors, it
is important to set the pull high/low resistors correctly so that the
electrical signal is not corrupted. For each serial port, DIP switches are
used for termination resistor and pull high/low resistor settings. To enable
the 120 Ω termination resistor, set switch 3 on the assigned DIP switch to ON;
set it to OFF (the default setting) to disable the termination resistor. To
set the pull high/low resistors to 150 KΩ (the default setting), set switches
1 and 2 on the assigned DIP switch to the OFF position; set them both to ON
for 1 KΩ.
Pull High/low Resistors for the RS-485 port
Default
| SW | 1 | 2 | 3 |
|---|---|---|---|
| Pull High | Pull Low | Terminator | |
| ON | 1 Kc. 2 | 1 K9. | 120 K2 |
| OFF | 150 KO. | 150 KO |
Software Installation
You can download the MGate Manager, User’s Manual, and Device Search Utility
(DSU) from Moxa’s website: www.moxa.com. Please refer
to the User’s Manual for additional details on using the MGate Manager and
DSU.
The MGate MB3280 also supports login via a web browser.
Default IP address: 192.168.127.254
Default account: admin
Default password: moxa
Pin Assignments
Ethernet Port (RJ45)
| Pin | Signals |
|---|---|
| 1 | Tx+ |
| 2 | Tx- |
| 3 | Rx+ |
| 6 | Rx- |
Serial Port (Male DB9)
Pin| RS-232| RS-422/485
(4-Wire)| RS-485
(2-Wire)
---|---|---|---
1| DCD| TxD-(A)| –
2| RDX| TxD+(B)| –
3| TxD| RxD+(B)| Data+(B)
4| DTR| RxD-(A)| Data-(A)
5| GND| GND| GND
6| DSR| –| –
7| RTS| –| –
8| CTS| –| –
9| –| –| –
Environmental Specifications
Power Requirements
Power Input| 12 to 48 VDC
Power Consumption| 12 to 48 VDC, 250 mA (max.)
Operating Temperature| 0 to 60°C (32 to 140°F)
Storage Temperature| -40 to 85°C (-40 to 185°F)
Operating Humidity| 5 to 95% RH
Dimensions
With ears:
Without ears:| 22 x 100 x 111 mm (0.87 x 3.94 x 4.37 inch)
22 x 77 x 111 mm (0.87 x 3.03 x 4.37 inch)
P/N: 1802032800015
Documents / Resources
| MOXA
MGate MB3280 Series 1-2-and 4-Port Standard Serial-to-Ethernet Modbus
Gateways
[pdf] Installation Guide
MGate MB3280 Series, 1-2-and 4-Port Standard Serial-to-Ethernet Modbus
Gateways
---|---
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>