Daisy-Chain Connection Support For Other Devices - ABB RMC-100 User Manual

Figure 4-18: Local access to an RMC-100 with non-default IP address
4.6.3

Daisy-chain connection support for other devices

The RMC in 1 Network (2-port switch) mode supports daisy-chain connections with other devices.
Additional devices in the field can connect to a local network switch (star topology) or to the RMC for
the uplink to the wide area customer network (daisy-chain topology). Figure 4-19 shows an example
of a daisy-chain of multiple XIOs and an RMC. Because the XIOs have multiple ports, they can also
support additional devices. To simplify device management and configuration, daisy chained XIOs are
also in switched mode. Ethernet interfaces connected through the chain are combined into a single
network; their assigned IP addresses have the same common subnet (in the example the generic
subnet is represented by "ZZZ", and each device has a unique IP address on that subnet).
An RMC in 1 Network mode forwards traffic between the network and daisy-chained devices
transparently. Figure 4-19 shows an example of daisy-chain connection support with two XIOs. The
local network switch is not shown (The local switch may have a limited number of ports and support
only the RMC and the uplink connection). RMC port E1 connects to the customer network and port E2
daisy-chains to the XIOs (in 4-port switch mode for this example).
6 0 | R MC-1 00 | 2 10 55 5 2MN A E