• Preventing ElectrostaticDischarge Damage to an MX5, MX10, MX40, and MX80 Router
on page 194
• DC Power Circuit Breaker Requirements for the MX5, MX10, MX40, and MX80 Routers
on page 62
• DC Power Source Cabling for MX5, MX10, MX40, and MX80 Routers on page 62
• DC Power Cable Specifications for MX5, MX10, MX40, and MX80 Routers on page 63
Replacing an MX5, MX10, MX40, and MX80 DC Power Supply
•
Removing an MX5, MX10, MX40, and MX80 DC Power Supply on page 143
•
Installing an MX5, MX10, MX40, and MX80 DC Power Supply on page 145
Removing an MX5, MX10, MX40, and MX80 DC Power Supply
Before you remove a power supply, be aware of the following:
NOTE: The minimum number of powersupplies must be presentin the router
at all times.
WARNING: Before performing DC power procedures, ensure that power is
removed from the DC circuit. To ensure that all power is off, locate the 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: To maintain proper cooling and prevent thermal shutdown of the
operating power supply unit, each power supply slot must contain either a
power supply or a blank panel. If you remove a power supply, you must install
a replacement power supply or a blank panel shortly after the removal.
NOTE: After powering off a power supply, wait at least 60 seconds before
turning it back on.
To remove a DC power supply (see Figure 64 on page 144):
1. Switch off the dedicated customer site circuit breaker for the power supply being
removed. Follow your site's procedures for ESD.
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.
143Copyright © 2017, Juniper Networks, Inc.
Chapter 20: Replacing Power System Components
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