Installing An Mx2020 Ac Power Supply Module; Figure 183: Removing An Ac Power Supply Module From The Mx2020 Router - Juniper MX2020 Hardware Manual

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Installing an MX2020 AC Power Supply Module

Figure 183: Removing an AC Power Supply Module from the MX2020

Before you install a PSM, be aware of the following:

The AC PSM is hot-swappable when a minimum number of PSMs

installed and operational.

The AC PSMs have no circuit breakers that can physically

disconnect AC current from the router. After AC feeds have been connected

to the PDM, the AC voltage is always present on the power midplane and is

distributed to the PSM connectors on the power midplane.

To maintain proper cooling and prevent thermal shutdown of the

operating PSM, each PSM 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.

Chapter 25: Replacing Components