Loudspeaking Intercom Systems and Audio Power Amplifiers

The battery powered amplifier unit provides voice communications and signaling facilities. An internal Nickel Metal Hydride battery it is trickle charged from a central power supply unit via an interconnecting cable.

It comprises a steel enclosure which houses two side facing loudspeakers, and a polycarbonate amplifier unit. The Interior includes a microphone behind a grill on the front and three push buttons. The whole unit is sealed to IP65 to withstand arduous environments.

Cable entries (20mm) are provided at each side of the unit. Internal connections are by plugs and sockets for easy maintenance.

Stand-alone voice communication and signaling can be provided by a PSU and a number of BMAs interconnected by a 3- core cable.