page 7 579-1150 Rev M
4010ES IDNAC Fire Alarm System Installation Guide
2.2.1 Connecting network loops (4120 network only)
Network loops can be joined via physical bridge cards. There may be no more than two Class X network loops (two hub configurations)
connected in tandem. For every two loops that are interconnected (using one physical bridge), there can be a maximum of three physical
bridges used in a star configuration. See Figure 3.
Figure 3: 4120 Interconnected loop configuration
2.2.2 ES Net Network configurations
The ES Net Network supports multiple topologies, allowing diverse interconnections between ES Net Nodes. These connections may be
used to create bridged rings, spurs or hub/star topologies. The only limitations to these connections are the maximum number of bridged
rings (four) and the available fire ports on the ES Net NIC card (six). The ring configuration, as shown in Figure 4, consists of nodes that
are connected to each other to form a closed loop (Class X). The hub/star configuration, as shown in Figure 5, consists of several nodes
connected directly to one common node. This configuration can be redundant (Class X) as two links can be set up between the common
node and each of the remote nodes. This configuration can also be non-redundant (Class B) with a single link set up between the common
node and the remote node. The Class B configuration provides no alternate communication path between two nodes, therefore, a single
fault in the network could segment the network. A multi-ring network with two bridged rings and a single panel connected through a fire
spur is shown in Figure 6.
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