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Introduction
Manual Documentation Number: MES1A/MES1B-2106m PN7138-rev001
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
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MES1A Converters allow new and legacy Modbus ASCII/RTU slave
devices with RS-232 serial ports to operate on a TCP/IP network as full
Modbus TCP slaves. All Modbus TCP devices on the network can share
access to the Modbus ASCII/RTU device.
MES1B Converters allow Modbus/RTU slave devices with RS-422/485
interfaces to operate on a TCP/IP network as full Modbus TCP slaves. All
Modbus devices on an RS-485 bus can be connected to the TCP/IP network
via the MES1B, allowing them all to be accessed by Modbus TCP/IP devices
on the network.
Traditional Modbus ASCII/RTU master devices also can be connected to
TCP/IP networks using the MES1A/B, making the device appear to be a full
Modbus TCP master on the network. It can directly access Modbus TCP
slave devices. It also can access other Modbus ASCII/RTU slaves that are
connected to the network via other MES1A/B Converters, as if it is talking
directly to a Modbus ASCII/RTU slave.
Features
• Converts Modus ASCII/RTU to Modbus/TCP
• Small, economical and configurable
• MES1A supports TD, RD and GND RS-232 lines
• MES1B supports TDA(-), TDB(+), RDA(-), RDB(+) RS-422/485 lines
• LEDs on network connection indicate link integrity and data transfer
activity
• 10/100 Mbps auto-detecting operation
• Removable screw terminal strips for power supply
• Removable screw terminal strips for RS-422/485 connection (MES1B)
• Device Installer user interface software included
• DIN rail mountable