Juniper MX2010 Hardware Manual page 72

Figure 18: Airflow Through the Chassis
Upper Fan trays
Card cage
Airflow
divider
Card cage
Lower fan trays
The MX2010 router provides a two-stage front-to-back cooling system. Air is pushed into the bottom
inlet and up through the lower fan tray, and exits through the opening between the backplanes in the
center of the chassis. This cools the bottom MPCs, and half of each SFB and CB-RE. Air is pulled through
the SFBs and all the CB-REs in the center of the chassis and is exhausted out the upper rear of the system.
The CB-REs and SFBs are equipped with an air divider to deflect the exhaust air for the bottom half of the
system out and direct the air for the top half of the system out.
Figure 19: Upper/Lower Fan Tray
1 1
2
1 Safety double latch system
—
Power
supply
cooling
2 STATUS LED
—
47