How it works
The lines coupled by the repeater are independent electric segments that can be optimally terminated in terms of signals. In this way topologies can be implemented that are not possible with a pure line of the bus due to electrical reflections.
According to the transceiver output capacities, the division of a CAN system into several subsystems, connected via CAN repeaters, increases the maximum number of bus nodes. Using repeaters does not influence the real-time behavior of a system because in terms of transmission behavior it corresponds to a network that consists only of lines.
In terms of signals, the repeater corresponds to a line with relevant delay time. Therefore, it cannot be used to extend a CAN system. However, using repeaters allows to increase the system dimensions indirectly, as shown in the following sample: