What it is and what it connects to
The Siemens 6GK8553-0BB00-1DA1 is a SCALANCE MRB85536M Radio Unit – the outdoor radio head for a private 5G cell. It transmits at 24 dBm in the n78 band (3.6–3.8 GHz) and connects to the SIMATIC IPC1047E and SINEC Industrial 5G RAN via a 10 Gbps optical SFP+ link on the fronthaul interface. Four N-Connect antenna ports give you space for MIMO or sectorized coverage. The unit is IP65 rated and operates from -30 °C to +60 °C, making it fit for cabinetless installation on a machine frame or rooftop. Power comes in over a 24 V DC M12 L-encoded connector – a standard industrial power format that matches Siemens power supplies and avoids wiring confusion on site.