Power Supply Leds And Self-Test Button; Fan Tray; Figure 10: Airflow Through The Chassis; Table 7: States For Power Supply Led - Juniper M10 Hardware Manual

Power Supply LEDs and Self-test Button

Table 7 describes the LED on both AC and DC power supplies.

Table 7: States for Power Supply LED

The self-test button on the power supply faceplate initiates a self-test sequence. Do not press
this button; it is for use by qualified service personnel only.

Fan Tray

The router cooling system consists of a fan tray that installs into the chassis from the rear, as
shown in Figure 3. It houses four fans, which draw room air into the chassis to keep the
internal temperature below a maximum acceptable level. The air flows side-to-side in the
chassis, as shown in Figure 10.

Figure 10: Airflow through the Chassis

Description Specification
Input DC current rating 13.5 A @ –48 V
+1.5 V, +2.5 V, +3.3 V, +5.0 V, +12 V, +12 V
Output voltages
The DC power supplies are marked –48 VDC. This is the nominal voltage
associated with the battery circuit. Any higher voltages are to be associated
only with float voltages for the charging function.
Label Color State
OUTPUT Blue On steadily
OK
Blinking
Description
Power supply is functioning normally, input is
occurring, outputs are within range, and the
temperature is within range.
Power supply has failed.

Fan tray

Front of chassis
Hardware Component Overview
Fan Tray
19