Siemens 6AV3520-1DK00 Human Machine Interface

Siemens 6AV3520-1DK00 is a SIMATIC HMI operator panel, commonly labeled OP20/220-5, designed to serve as a dedicated human-machine interface for Siemens S7-based automation systems. Marketed as a pupitre opérateur, it provides a direct input and display surface for operator interaction with a machine, and it connects to compatible controllers via a serial interface (TTY/V.24). The 6AV3520-1DK00 code uniquely identifies this panel within Siemens’ catalog, while the OP20/220-5 designation describes its specific hardware configuration. Typical applications include local control and status display on manufacturing lines, machine tending, and small-to-mid-size control stations where a purpose-built HMI is preferred over PC-based solutions. When paired with compatible Siemens controllers, it supports straightforward operator inputs and real-time process visualization, helping operators monitor performance data and issue basic commands at the point of operation.