Remove An Acx5400 Dc Power Supply Module - Juniper ACX5448-D Hardware Manual

Remove an ACX5400 DC Power Supply Module

Before you remove a power supply module (PSM), be aware of the following:
NOTE: The minimum required number of PSMs must be present in the router at all times.
WARNING:
from the DC circuit. To ensure that all power is off, locate the 2-pole circuit breaker
on the panel board that services the DC circuit, switch the circuit breaker to the off
position, and tape the switch handle of the circuit breaker in the off position.
CAUTION:
power supply unit, each power supply slot must contain either a PSM or a blank panel.
If you remove a PSM, you must install a replacement PSM or a blank panel shortly
after the removal.
NOTE: After powering off a PSM, wait at least 60 seconds before turning it back on.
CAUTION:
To remove a DC PSM:
1. Switch off the dedicated customer-site 2-pole circuit breaker for the PSM being removed. Follow your
site's procedures for preventing ESD damage.
2. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no chance
that the cables might become active during the removal process.
3. Verify that the status LED on the PSM is not lit.
4. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other
end of the strap to the ESD point on the chassis.
Before performing DC power procedures, ensure that power is removed
To maintain proper cooling and prevent thermal shutdown of the operating
Do not mix AC and DC PSMs in the same chassis.
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