The small system controller PRA-SCS is the budget variant in the range of PRAESENSA system controllers. The small controller has all the features of the large system controller PRA-SCL except for some limitations regarding the size of the system. The system controller manages all system related functions in a PRAESENSA Public Address and Voice Alarm system. It routes all audio connections between network-connected PRAESENSA audio sources and destinations. It supervises and plays back messages and tones, stored on its flash memory, either scheduled or manually started from a call station or PC. It manages the routing of background music streams, along with business calls and emergency calls, all based on priority level and zone occupancy. It collects all status information of connected system devices, manages the event logs and reports faults. The system controller is network‑connected via OMNEO and DC‑powered from a multifunction power supply with integrated battery backup, accommodating both centralized and decentralized system topologies. Connections to other devices in the system are made using the built‑in 5‑port switch, supporting RSTP. The built‑in web server allows for system configuration using a browser.