SIPROTEC 4 integrates protection, control, measurement, and automation functions in one device. The homogenous system platform, the unique DIGSI 4 engineering program and extensive experience of more than a million successfully operating devices in the field worldwide – thanks to these unique advantages, SIPROTEC 4 enjoys top recognition among users worldwide. SIPROTEC 4 is the industry standard for digital protection technology today in all fields of application.

The communication modules are available for the entire SIPROTEC 4 relay range. Depending on the relay type, the following protocols are available: IEC 60870-5-103, PROFIBUS DP, PROFINET I/O, MODBUS RTU, DNP 3.0 and Ethernet with IEC 61850. No external protocol converter is required.