Ethernet – RS485, Modbus RTU/IP router - MIDAM CETH48501
10/100 Mbit Ethernet to RS485 converter with Modbus RTU/IP routing (terminal server) capability. It offers transparent data transfer between Modbus devices and controllers on different physical layers. The converter features integrated web server for simple, browser-based configuration and provides the simplest solution to connect serial and Ethernet Modbus devices in industrial automation applications.
- Ethernet 10/100 Mbit to RS485 bus converter
- Modbus RTU/IP routing capability (terminal server)
- Transparent Modbus data transmission between devices on different physical layers
- Integrated web server
Function
The CETH48501 converter is able to connect any RS485 device to a PLC/PC over an Ethernet network. Either protocol is able to read or write values to and from the shared block of data or Modbus RTU slaves are presented as Modbus TCP/IP servers. Requests sent to a Modbus TCP/IP node ID will be routed to the matching slave ID on the Modbus RTU network. The third option is that Modbus TCP/IP servers are presented as Modbus RTU slaves. Define the IP address and unit ID’s of your Modbus server devices in the router. Then define what slave ID they will be mapped to. The Digi RealPort Software creates a virtual COM port on the host PC. This virtual port enables any software to communicate with a remote RS485 device. The COM port redirector runs under Microsoft Windows, UNIX and Linux. Maximum communication speed is 115200 bps. The communication circuits are protected against overvoltage and galvanically isolated from other parts of the converter. The module parameters and functions are configured over SNMP or secured web communication (HTTP / HTTPS protocols). The converter status is indicated by a green LED (Power) positioned close to the serial connector. The RS485 data communication is indicated by two LEDs: green (TxD) and red (RxD). The Ethernet connector (RJ45) provides two LEDs: Link and Network activity. The RS485 bus may be terminated using the BUS END DIP switch. Communication speed and number of data bits are set by dedicated DIP switches as well.
Application
- Modbus RTU master to Modbus TCP/IP client
- Modbus RTU slave to Modbus TCP/IP client
- Modbus TCP/IP servers to Modbus RTU master
- Remote connection of Modbus RTU / RS485 devices to Modbus TCP SCADA systems via Ethernet network
- Connection of third-party I/O modules for data transmission and signal acquisition
- Applications where Ethernet-side latency may not meet the timing requirements of the serial protocol driver
Industrial Automation Profile
The Industrial Automation (IA) Profile allows you to connect IA devices and PLCs to the serial port in order to network-enable the devices. Use this profile if you need to communicate over the network with an IA device or PLC that only uses serial protocols. This profile may also be used to add routing capabilities to IA devices or PLCs that act as serial masters and send packets to various systems or devices on the network. Industrial Automation profile enhances the IA device or PLC connected to the serial port.