Juniper MX2010 Hardware Manual page 420

CAUTION:
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.
NOTE: After powering on a PSM, wait at least 60 seconds before turning it back off.
To install an AC PSM (see
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.
WARNING:
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.
To maintain proper cooling and prevent thermal shutdown of the operating
Figure 186 on page 405,Figure 187 on page
If there is only one PSM installed and operational, the power supply
405, or Figure 188 on page
404
406: