B&B Electronics MES1B Benutzerhandbuch

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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