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MGate MB3270 and MB3270I
Quick Installation Guide
Third Edition, October 2007
1. Overview
The MGate MB3270 and MB3270I are 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 62 serial slaves can be connected simultaneously.
2. Package Checklist
Before installing the MGate MB3270 or MB3270I Modbus gateway,
verify that the package contains the following items:
y
MGate MB3270 or MB3270I Modbus gateway
y
Document & Software CD
y
MGate MB3270 and MB3270I Quick Installation Guide
y
Product Warranty Statement
Please notify your sales representative if any of the above items is missing
or damaged.
3. Hardware Introduction
LED Indicators
Name
Color
Function
PWR1
Red
Power is being supplied to the power input
PWR2
Red
Power is being supplied to the power input
(steady) Power is on and the unit is booting up
Red
(blinking) IP conflict, DHCP or BOOTP server did
not respond properly, or a relay output occurred
(steady) Power is on and the unit is functioning
normally
Green
(blinking) Unit is responding to Locate function
RDY
Off
Power is off or power error condition exists
Orange 10 Mbps Ethernet connection
Green 100 Mbps Ethernet connection
Ethernet
Off
Ethernet cable is disconnected or has a short
Orange Serial port is receiving data
Green Serial port is transmitting data
P1, P2
Off
Serial port is not transmitting or receiving data
The MGate MB3270 and MB3270I each provide two DB9 ports to
connect to serial devices.
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MB3270
MGate
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P1
P2
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.
4. Hardware Installation Procedure
STEP 1
: Use a standard straight-through Ethernet cable to connect the
MGate to a network hub or switch.
STEP 2
: Connect your device to the MGate serial port.
STEP 3
: Mount the MGate on a DIN-rail.
STEP 4
: Connect the power source to power input.
5. Software Installation Information
To install MGate Manager, insert the MGate Document & Software CD
into your PC’s CD-ROM drive. Once the installation window opens, click
the Installation button and follow the onscreen instructions. For more
detailed information about MGate Manager, click the Documents button
and select the MGate MB3000 User’s Manual.
6. Pin Assignments
Ethernet Port (RJ45)
Pin
Signals
1 Tx+
2 Tx-
3 Rx+
8
1
6 Rx-
Serial Port (Male DB9)
5
4
3
2
1
9
8
7
6
Pin
RS-232 RS-422/485 (4W) RS-485 (2W)
1
DCD
TxD-(A)
---
2
RxD
TxD+(B)
---
3
TxD
RxD+(B)
Data+(B)
4
DTR
RxD-(A)
Data-(A)
5
GND
GND
GND
6
DSR
---
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7
RTS
---
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8
CTS
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9
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P/N: 1802032700011
