Siemens 7SR5421-2AD26-0AA0

Transformer protection (2 wdg.) 8 curr. trans., 4 volt. trans. 3 AFD (Arc Flash Detector), 17 BI, 13 BO (incl. 3 HSBO) Standard interface: 1 x USB (front), RS 485 (rear) + 2 x optical LC- interfaces S12 enclosure