Disconnect power from the network engine by removing the terminal block plug from the power terminal port on the network engine (Figure 1) or disconnecting the power adapter cable.
When you disconnect or lose supply power from the network engine, the network engine becomes nonoperational when the power management settings expire. The HEARTBEAT LED (Figure 1) remains on (blue), and the super capacitor continues to power the network engine for approximately 30 seconds so that volatile data can be backed up in nonvolatile memory. The HEARTBEAT LED goes off when the data backup is complete.
Note: The behavior of the super capacitor is different from backup batteries that
network engines have used in the past. For example, the capacitor requires time to
recharge after each power cycle. The unit is not designed for frequent power cycles
over a short period of time, such as three or four power cycles in one hour. In this
scenario, the capacitor can deplete enough so that it no longer functions. A fully
depleted capacitor can take up to 90 minutes to recharge after the network engine is
plugged into its power source.