Vlinx MESR321 series Modbus Gateway

€449.00 ex.VAT
  • Manufacturer: Advantech B+B SmartWorx
  • Product Code: MESR321 | MESR321-SL | MESR321-ML
  • DATA SHEET: click to download pdf
  • INSTALLATION GUIDE: click to download pdf

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Vlinx MESR321 series Modbus Gateways

MESR321 Isolated Ethernet Serial Server with 2 RJ45 Ethernet Ports and 1 RS-232/422/485 Serial Port  $449.00 
MESR321-SL Isolated Ethernet Serial Server with 1 Single Mode Fiber, LC Ethernet Port and 1 RS-232/422/485 Serial Port  $649.00 
MESR321-ML Isolated Ethernet Serial Server with 1 Multi Mode Fiber, LC Ethernet Port and 1 RS-232/422/485 Serial Port  $549.00 
MESR321 Modbus Gateways connect Modbus devices to Ethernet networks and enable you monitor and control your Modbus devices from anywhere on the Ethernet LAN or WAN using Direct IP Mode connections.

  • Three-way isolation
  • Ethernet-enabled Modbus RS-232/422/485
  • Modbus TCP, ASCII & RTU
  • Modbus flexibility
  • Support up to 16 masters and 32 slaves
  • Ethernet fiber options
  • MESR321 Quick Start Guide
  • Designed for Tough, Industrial Environments Heavy-duty, metal, direct mount enclosure
  • IP30 slim line enclosure with optional DIN rail mountable adapter
  • DC power source ranging from 10 to 30VDC

Vlinx MESR321 series Modbus Gateways connect Modbus devices to Ethernet networks and let you monitor and control your Modbus devices from anywhere on your Ethernet LAN or WAN. Supporting up to 16 masters and 32 slaves, the gateways feature auto-detecting SP 10/100 copper and/or fiber optic options that include Multi-mode LC and Single-mode LC.
The data ports are isolated from one another and also from the power supply.
The easy to use Vlinx software is compatible with Windows 2003 Server, XP, Vista, Win 7 and Windows Server 2008. It features Modbus messaging priority control and allows management through multiple TCP/IP client sessions. Serial data rates of up to 230 kbps ensure maximum network flexibility.
Featuring a slim IP30 DIN rail mountable case, MESR321 series gateways are built for use in industrial environments. They can be powered via a barrel connector or a terminal block. (An external power supply is required; sold separately.) The MESR321 has an additional Ethernet port which functions much like an Ethernet Switch, allowing pass-through connectivity for other Ethernet devices. This port can also be used to “daisy chain” multiple gateways.


Serial to Ethernet 2kV
Serial to Power 2kV
Ethernet to Power 1.5kV

Source External
Input Voltage 10 to 48 VDC (58 VDC Maximum)
Connector Removable Terminal Block (12 – 28 AWG and barrel connector)
Power Consumption 4 Watts

LED Indicators Ready, Power, Serial Data, Ethernet Speed, Ethernet Link
Switches Reset Button (Mode)
Dimensions 13.823 x 8.633 x 3.500 cm (5.442 x 3.399 x 1.378 in)
Enclosure DIN Rail, Panel, Metal, IP30

Operating Temperature -40 to 80°C (-40 to 176°F)
Operating Humidity 10 to 95% Non-condensing
MTBF 86,882 hours
MTBF Calculation Method Based on MIL 217F using Parts Count Reliability

Serial Memory 8KB per port
Network Memory 8 KB
LAN 10/100 Mbps Auto-detecting, 10BaseT or 100BaseTX
Ethernet IEEE 802.3 auto detecting & auto MDI/MDI-X, 10BaseT and 100Base T

IP Mode Static, DHCP
TCP/UDP User definable

Connection Mode Modbus RTU Master/Slave, Modbus ASCII Master/Slave
Client Connection At power up or upon data arrival
Search Search direct COM and Ethernet Auto Search or specific IP
Diagnostics Display PC IP, ping, test VCOM, save test config (text readable)
Firmware Upgrade Vlinx Manager

Vlinx Manager Win XP (32/64 bit), 2003 Server (32/64 bit), Vista (32/64 bit), 2008 Server (32/64 bit), Win 7 (32/64 bit), Windows 2008 Server

Standards IEEE 802.3, 802.3u, 802.3x
Processing Type Store and Forward with 802.3x full duplex, non blocking flow control
Flow Control IEEE 802.3x flow control, back pressure flow control
MAC Address Table 2K

RS-232 TD, RD, RTS, CTS, DTR, DSR, DTD, Signal Ground
RS-485 2-Wire Data A(-), Data B(+), Signal Ground
RS-422/485 4-Wire TDA(-), TDB(+), RDA(-), RDB(+), Signal Ground
Serial Connector DB9M RS-232, Terminal Block RS-422/485
Data Rate Up to 230.4 Kbps

Emissions FCC Class B, CISPR Class B (EN55022)
CE EN61000-6-2:2005 (Heavy Industrial)
EN61000-4-2:2008 (ESD) +/-8kV Contact, +/-15kV Air
EN61000-4-3:2006 (RI) 10V/m, 80-1000MHz; 3V/m, 1.3 to 2.7 GHz
EN61000-4-4:2004 (EFT Burst) +/-2kV DC ports; +/-1kV signal ports
EN61000-4-5:2005 (Surge) +/- 0.5 kV DC Ports, +/- 1 kV Signal Ports
EN61000-4-6:2005 (CI) 10 VRMS, 0.15 to 80 MHz
EN61000-4-8:2001 (Magnetic) 10A/m, 50Hz & 60Hz
Shock IEC60068-2-27 50G peak, 11ms, 3 axes
Vibration IEC60068-2-6 10-500Hz, 4G, 3 axes
Freefall (Drop) IEC60068-2-32 10 total drops from sides, corner and edges, 1M