The BMB01 is an input and output control port (I/O) expander for ASL audio routers. The VAR and VIPEDIA-12 Routers are able to support the connection of up to 9 remote BMB01 units, connected by a multi-drop RS485 serial interface. Each BMB01 unit provides the following inputs and outputs to extend the control and interfacing capability of the router:

• 12 analogue inputs
• 12 digital (opto-isolated) inputs
• 12 digital (open collector) outputs

These input and output control ports may be used for functions such as: Program Selection, Volume Control, Fault Input, Routing Control, Routing Reset Input, External Fault Input, and Busy Output