> For the complete documentation index, see [llms.txt](https://docs.monokot.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.monokot.io/tags-and-devices/iec-60870-5-104-connectivity.md).

# IEC 60870-5-104 Connectivity

To interact with peripheral stations of the IEC 60870-5-104 standard, the server provides an IEC 60870-5-104 device. The device functions as a master node in an Ethernet network and implements most of the application commands of the 60870-5-5 standard.

### Key Features <a href="#h.1jrxdqk9ft" id="h.1jrxdqk9ft"></a>

* Representation of value, quality descriptor, cause of transmission, timestamp as OPC UA elements.
* Periodic, manual, event-driven call of applied commands (general interrogation, counter interrogation, time synchronization, etc).
* Controlled station time zone setting.
* SSL support.
* Proper writing of buffered data to external database.
* Shared TCP/IP channel concept for primary device and subdevice.