Modbus-Datenkonzentratoren

The MDC-711 CR links a serial Modbus RTU device or two to an Ethernet network. Its RS-232 and RS-485 ports can act as Modbus RTU master or slave, while the Ethernet port serves Modbus TCP slave connections to up to eight host controllers at the same time. A user-defined command table polls the attached devices and merges their data into one continuous address space, so a SCADA host can read or write everything in a single bulk transaction.Each COM port can be configured independently for baud rate, data format and timeout. Baud rates run from 1200 to 115200 bps, with N81, E81 and O81 data formats. Write commands are queued with first priority to keep control values current. Polling definitions are set up from a simple CSV file, and an HTML5 web interface handles configuration import, export and start-up.The unit has a metal casing for wall mounting and accepts a non-regulated +10 VDC to +30 VDC supply, drawing 2.5 W. It is rated for operation from -25 to +75 °C and is CE, UKCA, FCC, RoHS and WEEE marked. It suits upgrading legacy Modbus RTU equipment to Ethernet-based monitoring.ApplicationsUpgrading legacy Modbus RTU devices to Ethernet-based systemsSCADA applications requiring centralised data monitoringConsolidating data from multiple serial Modbus devices for bulk reading by a host

MDC-714 CR is a Modbus data concentrator that bridges serial Modbus devices to an Ethernet network. Its single Ethernet port acts as a Modbus TCP slave, while the RS-232 and four RS-485 ports can each operate as a Modbus RTU master or slave, so existing serial devices can be brought onto an Ethernet-based system without replacing them.The unit polls the connected devices through a user-defined command table, reads their data port by port and merges it into a continuous address format. A host computer can then read or write the combined data in a single transaction, which reduces Ethernet traffic and simplifies system architecture. Write commands are queued with first priority to keep updates fast.Configuration is handled through a simple CSV file, with an HTML5 web-based interface for importing and exporting settings and starting the system. The metal casing is designed for wall mounting and the unit operates from a +10 VDC to +30 VDC non-regulated supply across -25 to +75 °C.ApplicationsUpgrading legacy Modbus RTU devices to Ethernet-based systemsSCADA systems and centralised data monitoringConsolidating data from multiple serial Modbus devices for a single host

The MDC-714i CR gathers data from Modbus RTU devices on its serial ports and presents it to host systems over a single Ethernet connection. It provides one RS-232 port and four RS-485 ports, three of which are signal-isolated, so legacy serial devices can join an Ethernet network.A user-defined command table lets the unit poll each COM port in turn and merge the results into a continuous address range, so a host can read or write data in bulk. Each port can be configured independently for baud rate, data format and timeout, and each can operate as a Modbus RTU master or slave. Write commands are queued with first priority to keep data updates fast.Configuration is handled through a simple CSV file and an HTML5 web interface, which supports import, export and start-up. Up to eight simultaneous Modbus TCP connections are supported. The metal casing is wall-mounted and rated for operation from -25 to +75 °C.ApplicationsUpgrading Modbus RTU devices to Ethernet-based systemsCentralised data monitoring in SCADA applications

The MDC-741 CR links several serial Modbus devices to an Ethernet network. Its four RS-232 ports and one RS-485 port can operate as Modbus RTU masters or slaves, while the Ethernet port presents the collected data as a Modbus TCP slave to host controllers.Data from every serial port is gathered through a user-defined polling table and merged into continuous address ranges, so a host can read or write the combined data in bulk rather than polling each device individually. Each COM port can use its own baud rate and data format, and write commands are queued with priority to keep control values current.Ethernet: 1 x 10/100 Base-TX port with Modbus TCP slave supportSerial: 4 x 5-wire RS-232 and 1 x 2-wire RS-485 portsPower input: +10 VDC to +30 VDC, non-regulatedApplicationsUpgrading legacy Modbus RTU devices to Ethernet-based systemsCentralised data monitoring for SCADA applicationsConsolidating multiple serial Modbus devices into a single Modbus TCP host connection

MDC-771 CR provides one 10/100 Base-TX Ethernet port alongside seven RS-232 ports and one RS-485 port, so Modbus RTU devices on the serial side can be read and written from a Modbus TCP host. Each COM port can be set independently as a Modbus RTU master or slave, with its own baud rate, data format and timeout.The unit polls the connected devices using a user-defined command table and maps their data into a continuous address range, letting the host retrieve everything in a single bulk read. Write commands are queued with the highest priority so that control updates are passed through quickly.Configuration is handled through a simple CSV file, with an HTML5 web interface for importing, exporting and starting up the system. The model is well suited to upgrading legacy Modbus RTU equipment to an Ethernet network and to feeding centralised SCADA monitoring.ApplicationsUpgrading legacy Modbus RTU devices to Ethernet-based systemsCentralised data monitoring for SCADA applicationsConsolidating data from multiple serial Modbus devices for a single host

MDCL-705i collects data from several Modbus slave devices over its RS-485 ports and makes it available on Ethernet, so a SCADA, HMI or PLC can read many devices in a single poll. Polling definitions are written as Modbus RTU commands in a CSV file and imported through the built-in web interface, with up to 250 definitions across all RS-485 ports.Polled values are held in shared memory tables for coils, discrete inputs, input registers and holding registers, with up to 9600 registers per table. Up to 8 Modbus TCP clients can read this data at the same time, and ratio conversion turns raw register values into engineering units.The stand-alone data logger records user-selected Modbus registers periodically, with up to 120 parameters per record. Records are saved as CSV files to the included 32 GB microSD card and can be downloaded through the web interface for analysis in Microsoft Excel or a plain text editor.ApplicationsIIoT data acquisition from meters, sensors and other serial devicesConnecting conventional Modbus RTU equipment to SCADA, HMI and PLC systemsLocal data logging of Modbus register values for later analysis