Pic Offline Buttons; Power Supplies; Table 10: Alarm Leds - Juniper M10i Hardware Manual

Table 10

Table 10: Alarm LEDs

Shape

PIC Offline Buttons

Offline buttons for one row of PICs are located on each HCM (see
the button relays a request to the CFEB, which prepares the PIC for removal from
the router, or brings it online when it is replaced. The HCM in slot
on FPC
the PIC slot numbers. The PIC slots on the upper FPC are numbered from
(zero/zero) through
from
For PIC replacement instructions, see

Power Supplies

The router uses either AC or DC power. You can install up to four load-sharing power
supplies at the bottom rear of the chassis, as shown in
connect to the midplane, which distributes power to router components according
to their individual voltage requirements. When the power supplies are installed and
operational, they automatically share the electrical load.
An enable control pin on the output connector of each power supply ensures that
the supply is fully seated into the router midplane before the supply can be turned
on. The enable pin prevents a user-accessible energy hazard, so there is no
interlocking mechanism. The enable pin disables the voltage at the output connector
if the power supply is not turned off before removal.
The router must have at least two AC power supplies, and any two AC power supplies
can provide full power to the router. Three power supplies are required for
redundancy.
The router must have at least two DC power supplies, and any two DC power supplies
can provide full power to the router. DC system redundancy requires two power
sources from feed A and two power sources from feed B. If one feed fails or is shut
down for service, the other feed powers two DC power supplies and can provide full
power to the router's components indefinitely.
on page 19 describes the alarm LEDs in more detail.
Color State Description
Red On steadily Critical alarm LED—Indicates a critical condition
that can cause the router to stop functioning, such
as component removal, failure, or overheating.
Yellow On steadily Warning alarm LED—Indicates a serious but nonfatal
error condition, such as a maintenance alert or a
significant increase in component temperature.
. The HCM in slot
0
, right to left. The PIC slots in the lower FPC are numbered
0/3
1/0 (one/zero) through
Chapter 2: Hardware Component Overview
controls PICs on FPC . The buttons are labeled with
1 1
1/3 , right to left.
"Replacing a PIC"
Figure 6 ). Pressing
0 controls PICs
0/0
on page 96.
Figure 2 . The power supplies
Power Supplies
19