Signal transmitter insert, call systems, Busch-Infoline, signal transmitter insert buzzer for acoustic alarm signaling. Permanent signal. Typ. 70 dB at a distance of 1 m. 2 frequencies (200 Hz/750 Hz) selectable via internal jumper. Volume, separate for day and night operation, presettable. Nominal frequency: 50 Hz Protection class device: SELV Temperature range device: 5 °C to 40 °C
