Installing An Mx2020 Dc Power Distribution Module; Figure 118: Removing A Dc Power Distribution Module From The Mx2020; Router - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide
266

Figure 118: Removing a DC Power Distribution Module from the MX2020

Router

NOTE: Each PDM slot not occupied by a DC PDM must be covered by a PDM
blank panel.

Installing an MX2020 DC Power Distribution Module

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
in the position.
OFF
To install a DC PDM (see Figure 119 on page
Ensure that the voltage across the DC power source cable leads is 0 V and that there
1.
is no chance that the cable leads might become active during installation.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
2.
the strap to one of the ESD points on the chassis.
Move the DC circuit breaker on the power input source to the
3.
Switch off ( O ) the DC PSMs that are powered only from the DC PDMs being removed.
4.
Open both locking levers on either side of the PDM (see
5.
While holding both handles, guide the PDM until the locking levers are inserted into
6.
the chassis. With both hands push the locking levers simultaneously until the PDM is
fully seated into the chassis.
position, and tape the switch handle of the circuit breaker
267):
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position.
OFF
Figure 119 on page 267).