Cisco XR 12404 - Manual (Page 57)

2-11
Cisco XR 12404 Router Installation Guide
OL-13830-02
Chapter 2 Preparing for Installation
Installation Site Requirements
Environmental Guidelines
This section offers guidelines for operating your Cisco XR 12404 Router in
various environments; airflow, temperature and humidity, power source, AC and
DC powered routers, grounding connections and site wiring. To assure normal
operation and avoid maintenance difficulty, plan and prepare your site before you
install the router.
Airflow
The Cisco XR 12404 Router air circulation system consists of 1 fan tray assembly
mounted at the side of the chassis. The fan tray assembly maintains acceptable
operating temperatures for the internal components by drawing cooling air in
through a replaceable air filter, located on the right side of the chassis.
Air circulates through the card cage, and exhausts at the side of the chassis
(
Figure 2-4 ).
• Allow sufficient air flow by maintaining 6 inches (15.24 cm) of clearance at
both the inlet and exhaust openings on the chassis.
• The site should be as dust-free as possible. Dusty environments can clog the
air filter, reducing the cooling airflow through the system. This can cause an
over temperature condition in the router.
Under extreme environment conditions, the environmental monitoring system
will shut down the power to protect the system components.
todd.book Page 11 Monday, March 16, 2009 2:47 PM