Juniper MX2008 Hardware Manual page 478

Universal routing platform
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Replacing an MX2000 DC Power Distribution Module (240 V China)
Removing an MX2000 Router DC Power Distribution Module (240 V China) | 478
1.
Installing an MX2000 Router DC Power Distribution Module (240 V China) | 481
2.
Connecting an MX2000 DC Router Power Distribution Module (240 V China) Cable | 483
3.
Removing an MX2000 Router DC Power Distribution Module (240 V China)
Before you remove a PDM, be aware of the following:
NOTE:
The minimum number of PDMs must be present in the router at all times.
WARNING:
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:
power supply unit, each PDM slot must contain either a PDM or a blank panel. If you
remove a PDM, you must install a replacement PDM or a blank panel shortly after the
removal.
NOTE:
After powering off a PDM, wait at least 60 seconds before turning the circuit breaker
back on.
1. Switch off the dedicated customer site circuit breaker for the PDM 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.
3. Verify that the LEDs on the PDM to be removed are not lit.
Before performing DC power procedures, disconnect all power sources.
To maintain proper cooling and prevent thermal shutdown of the operating
478

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