Juniper EX9214 Hardware Manual page 185

Copyright © 2017, Juniper Networks, Inc.
for the first time. Applying installation torque to the nuts when they are
improperly threaded can damage the terminal stud.
CAUTION: The maximum torque rating for the terminal studs on the DC
power supply is 36 lb-in. (4.0 Nm) Excessive torque can damage the
terminal studs. Use only a torque-controlled driver or socket wrench to
tighten the nuts on the DC power supply terminals.)
Route the power cables along the cable restraint toward the left or right corner of the
9.
chassis. If needed, thread plastic cable ties, which you must provide, through the
openings on the cable restraint to hold the power cables in place.
Replace the clear plastic cover over the terminal studs on the faceplate.
10.
Verify that the power cabling is correct, that the cables are not touching or blocking
11.
access to switch components, and that they do not drape where people could trip on
them.
Switch on the dedicated customer site circuit breakers. Follow your site's procedures
12.
for safety and to prevent ESD damage (see
Damage" on page 329).
NOTE: The DC power supplies in slots
by dedicated power feeds derived from feed A and the DC power supplies
in slots
PEM2
derived from feed B. This configuration provides the commonly deployed
A/B feed redundancy for the system. For information about connecting
to DC power sources, see
Switches" on page
Verify that the
13. INP0 OK
you are using two feeds, verify that both
supply are lit steadily in green. The
the voltage at the input is in reverse polarity. Check the polarity of the power cables
to fix the condition.
On each of the DC power supplies, switch the DC circuit breaker to the center position
14.
before moving it to the On (
NOTE: The circuit breaker might bounce back to the Off (
you move the breaker too quickly.
Chapter 12: Connecting the Switch to Power
"Prevention of Electrostatic Discharge
and must be powered by dedicated power feeds
PEM3
"DC Power Supply Specifications for EX9214
99.
or LED on the power supply are lit green steadily. If
INP1 OK
and
INP0 OK
INP0 OK and INP1 OK
) position.
|
PEM0 and PEM1 must be powered
LEDs on the power
INP1 OK
LEDs are lit in amber color if
O ) position if
161