power supply units
Each enclosure contains two power supply units. Each power supply unit can provide power to the whole enclosure.
Note: The power supply has no power switch. A power supply is active when a power cord is
connected to the power connector and to a power source.
Figure 1 shows the rear view of a control enclosure and identifies the location of the power supply units and node canisters.
Each power supply also contains a fan that cools the power supply unit itself. Cool air is drawn in and passes over each power supply. The warmed air is ejected through the rear of each power supply. For optimal cooling, do not obstruct this airflow. Also, ensure that all enclosure components or fillers are installed while the system is operational.