The router uses DC power. There are two load-sharing, pass-through power supplies located at the bottom rear of the chassis, as shown in Figure 2. The power supplies connect to the midplane, which distributes power to router components according to their individual voltage requirements. When the power supplies are installed and operational, they automatically share the electrical load. If a power supply stops functioning for any reason, the remaining power supplies instantly begin providing all the power the router needs for normal functioning and can provide full power indefinitely.
For site wiring and power system guidelines, requirements, and specifications, see the following sections: