Strict cost requirements and a huge variety of automation scenarios mean that it is not possible to develop a universal programmable logic controller (PLC). For this reason, the following challenges can also arise down the road even if a well-suited controller has been selected:
- - Insufficient PLC resources, e.g. a low number of inputs and/or outputs
- - Issues with compatibility with other devices in the network (interface, protocol, etc.)
- - Large distances from the PLC to field devices.
To solve this and similar problems, remote I/O-modules have been developed. These modules are used to set up decentralized systems, to control industrial objects and processes. The expansion modules can complement such systems, with multiple inputs or outputs, thus ensuring more functionality and flexibility of the systems. Among many decentralized systems, the single-master systems based on the RS485 serial interface and Modbus protocol have become the most established in industrial automation. That is why akYtec I/O modules have the appropriate interfaces and protocols.
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