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MOD-ETH module is an innovative device converting Modbus TCP into Modbus RTU/ASCII.
The device has the Ethernet and RS485 interface, 4 digital inputs with counters and 3 relay outputs. All the inputs are insulated from logic with the aid of optoisolators.
Module MOD-ETH can connect up to 128 I/O modules Modbus (SFAR: SLIM, MINI, STANDARD and others) via the RS485 interface. Data collected by RS485 are further transmitted via Ethernet (Modbus TCP). SLIM series modules can be easily combined with each other and MOD-ETH modul through joint Quick Connector. Just connect the power and RS485 for the first module. Using a tape MOD-QC both values will be passed to the next module.
The communication takes place with the benefit of Modbus TCP protocole. Every received request from the Modbus TCP client is checked considering the address. If the address is different than the MOD-ETH device address, automatic conversion of the request frame into the Modbus RTU/ASCII protocole ensues. Later on, the correctly received answer is sent to the Modbus TCP client.
The usage of a 32-bit processor with ARM core assures fast data processing and smart communication.
The new function called Modbus Device Table allows the user to define their own enquiries to Modbus ATU/ASCII from the accessible internal registries of the device. This function allows to e.g. automatic reading of the statuses of the modules’ inputs on RS485 and inscribing these statuses into the MOD-ETH internal registries. Internal registries are accessible for the Modbus TCP clients without additional delays resulting from the RS485 magistral line. This solution strongly accelerates the communication. All the bit orders and registry orders of the MODBUS protocole are available.
The module is designed for mounting on a DIN rail in accordance with DIN EN 5002.
The module is equipped with a set of LEDs used to indicate the status of inputs and outputs useful for diagnostic purposes and helping to find errors.
Module configuration is done via built-in website or USB by using a dedicated computer program. You can also change the parameters using the MODBUS protocol.
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