Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


Installing an MX2010 DC Power Supply Module (-48 V)

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


The DC PSM is hot-swappable when a minimum number of PSMs installed and operational.


The DC PSMs have no circuit breakers that can physically disconnect DC line from the router. After DC feeds have been connected to the PDM, the DC 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.


After powering on a PSM, wait at least 60 seconds before turning it back off.

To install a DC PSM (see Figure 1):

  1. With one PSM installed and operational, install an additional PSM with the power supply switch in the off (O) or in the on (|) position.

    If there is only one PSM installed and operational, the power supply switch must be placed in the off (O) position.

  2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  3. While grasping the handle on the PSM faceplate with one hand, use your other hand to guide the power supply module into the chassis.
  4. Tighten the captive screws on the PSM faceplate.
  5. Turn on the power switch to the on (|) position.
  6. Verify that the PWR OK LED is lit steadily green.
Figure 1: Installing a DC Power Supply ModuleInstalling a DC Power Supply Module