System Overview
The CU has to be connected over CAN Bus with the AUW, this AUW is
the Master Access Unit Wireless (MAUW) and manages the whole
information flow between handles and CU.
Depending on the shape and size of the area that has to covered, the
communication range can be extended, by adding additional AUWs to
the MAUW. Up to 15 additional Relay Access Units Wireless (RAUWs)
can be connected to the MAUW. A RAUW differs from a MAUW as it
works only as range extender. Since they don't work as modules for the
CU they are not connected via the CAN Bus, the MAUW connects to the
RAUWs over a RS-485 cable connection.
They are connected as a chain and for clear internal identification the
hardware switch on the back of each AUW is set on a different position.
(The MAUW has to have this switch on position 0). The whole logic about
which RAUW respond to which Agent and which is accepting requests is
done inside the MAUW and does not affect the CU.
