The FN-4127-NIC Network Interface Card allows for the expansion of up to 64 nodes (combination of FACP’s or annuciators) on a single FireNET network wide system. Using the Loop Explorer configuration software up to 64 nodes can be programmed to respond to in a variety ways-independently or system wide. The flexibility extends the comprehensive cause and effect programming capability to the entire network allowing actions to be started from any point. The network communication protocol has been designed to be extremely tolerant to interference and data corruption. The simple 2 wire loop connection makes for ease during installation.