The Next Step ERX Edge Routers
Fans
Forced air-cooling keeps the temperature of the ERX modules and components within normal operating limits. In the ERX-1400 series, six cooling fans are located in a tray at the top of the system (see Figure 7-5). In the ERX-700 series, four cooling fans are located in a tray on one side of the system (see Figure 7-7).
The system monitors the temperature of each module. If the temperature of a module exceeds the maximum limit, the system immediately goes into thermal protection mode. In this mode, the modules consume extremely low levels of power. For information about troubleshooting high operating temperatures, see Chapter 8, Troubleshooting.
The fan tray has two redundant converters that power the fans (for the ERX-1400 series, a –24 V, 50 W converter; for the ERX-700 series, a –12 V, 15 W converter). If one converter fails, the other takes over. In addition, the system software reports an alarm if any of the fans overrotate or underrotate or if one of the converters fails.
The Next Step
Go to Chapter 2, Installing the ERX System.
