Cisco ASR 5000 Series Installation Manual page 20

▀ Chassis Configurations
Item Description
5 Lower fan tray cover/EMI shield: Secures the lower fan tray assembly in place and serves as an EMI shield. The
cover also provides an air baffle allowing air to enter into the chassis.
6 Lower bezel: Covers the lower fan tray bay.
7 Lower fan tray assembly: Draws ambient air through the chassis' front and sides for cooling and ventilation. It is
equipped with a particulate air filter to prevent dust and debris from entering the system.
8 Power Filter Units (PFUs): Each of the system's two PFUs provides -48 VDC power to the chassis and its associated
cards. Each load-sharing PFU operates independently of the other to ensure maximum power feed redundancy.
▄ ASR 5000 Installation Guide
20
ASR 5000 Hardware Platform Overview