CH-PCV1930 controllers may be connected to a building automation network in multiple ways: as daisy-chained devices, as part of a star (also called home run) type network, or as part of a ring network.
To daisy-chain CH-PCV1930 controllers, connect the controllers to the bus supervisor in a chain with the Ethernet cable connecting to the CH-PCV1930 at the ETH1 or ETH2 port, and connecting to the next device from the other port. Benefits of daisy-chained networks are that they require less physical wiring and new devices can be added easily to the network.
In a star network, each CH-PCV1930 controller is connected by Ethernet cable directly back to a main switch. This configuration reduces the possibility of network failure but requires more wiring to install.
A ring network is a chain of controllers virtually closed by a software component in an Ethernet switch. Not all switches support the ring topology. The dual-port controller from Johnson Controls supports Media Redundancy Protocol (MRP). With MRP, a chain of Ethernet devices can overcome any single communication failure, with a recovery time faster than in a BACnet system.