The MDCL-705i is used to collect and store data from multiple Modbus slave devices over the serial communication interface and make the data available to back-end management system via Ethernet communication. In this way, conventional devices can be connected to a modern control system and makes it easy to communicate with most SCADA / HMI system and PLCs through the Modbus TCP protocol.
 

Modbus Data Concentrator

The MDCL-705i performs the pre-defined Modbus RTU commands to read data from the Modbus RTU slave devices via the RS-485. It mirrors the data of the slave devices to its own Modbus registers. And it accepts up to 8 Modbus TCP masters to read data from the Modbus registers directly instead of polling each Modbus RTU slave device one by one. By this way it not only makes the data on the RS-485 being able to be shared with multiple Modbus TCP masters but also shorten the time to read data from multiple Modbus RTU slave devices.
 

Stand-alone data logging capability

The MDCL-705i uses a periodic method to record user-specified Modbus register data. Each data can contain up to 120 parameters. The data records will be stored in the built-in microSD memory card in CSV file format and can be downloaded to the computer through the built-in web interface. Data viewing and data analysis can be performed using Microsoft Excel software or a plain text editor.
 

Application Architecture:

 

Features:

• Support Modbus master/slave
• Supports up to 8 simultaneous Modbus TCP connections
• Up to 250 sets of Modbus RTU commands and built-in 9600 Modbus data registers
• Support CSV (Comma-Separated Values) file configuration, easy to use and maintain
• Built-in microSD memory card for storing Modbus data records
• Each data can contain 120 parameters
• The data record can support the ratio conversion function, which converts the original Modbus data into actual engineering units
• Isolated RS-485 with 2500 VDC isolation voltage protection

For more information about MDCL-705i, please visit the following website:
https://www.icpdas.com/en/product/MDCL-705i