The APR3-HUB2 is a non-addressable module that extends and divides the control panel’s bus into two completely isolated bus outputs (two for each connected APR3-HUB2). It extends the combus/communication bus by regenerating the signal between the control panel and its modules. Should one bus output experience trouble or tampering, the other will remain unaffected. The hub monitors the signal between the control panel and modules on each output. If the hub detects a loss of signal integrity it will cut off the troubled output until proper communication is reestablished.