IO Link is a modern and relatively cost-neutral option. It is not a bus technology, but instead a high-performance point-to-point communication protocol based on the usual three-wire system with standard cabling. The advantages of IO Link 1.1 include internationally standardised I/O technology (IEC 61131-9) for communication with sensors and actuators, a central database for fast commissioning, and automatic parameter configuration to minimise the downtime of machines and systems.I²C is a serial data bus technology developed by Philips, which has become the standard for simple communication inside equipment.
This synchronous master-slave interface enables communication between a master and up to 127 slaves. In addition to typical settings such as slave address and data format, units for pressure and pressure can be set.
DCT 531 with the RS485 interface utilises the Modbus RTU communication protocol, which has become established in the industrial sector as an open protocol. Interference-free communication over long distances is possible thanks to the underlying RS485 technology.