School bell controller 230V AC TYPE: SDM-10 EXT10000118

The SDM-10 school bell controller is designed to control the acoustic signaling used in schools using school bells (e.g.: DNT-212, DNS-212, DNT-212M, DNS-212M). The control is carried out automatically according to the set program. The program is arranged by specifying the time of the lesson, the length of the subsequent breaks and specifying the starting time. The device is prepared to run special functions (alarm bells, short lessons) through programmable inputs. The bell controller can be prepared in a ready-to-install version as an Electronic Janitor (EW-01). the design of the system guarantees battery backup of all settings in the absence of supply voltage.