Do you require additional hardware to interface to BACnet

No,

As long as your controller has been upgraded to support BACnet, then you do not need an additional PC or other hardware.

Each zencontrol Application controller, Room controller and LCM hosts its own BACnet Application Specific Controller (B-ASC).

Simply use a BACnet compatible client or BACnet software application and scan the IP network to discover your controllers.

For BACnet support documentation please follow view the following FAQ - Do-you-have-a-BACnet-PICS-document?