The audio control device is intended for door communication systems in which only audio components are supplied. It supports up to 70 devices (e.g. 1 built-in speaker, 5 add-on modules for built-in speakers, 68 surface-mounted home stations). In addition, the device features a door opener contact, which can be programmed using the buttons on the device.
Door openers with 8 to 12 V AC operating voltage can be connected directly to the control device's relay contact. Connecting other door openers is possible using an additional power supply. The electronic self-resetting overload protection is activated if the device is overloaded, e.g. if the bus lines are short-circuited due to an installation error or if too many bus participants have been connected.