Juniper MX2020 Hardware Manual page 334

NOTE: The DIP switches are only used to indicate presence of a feed. If both feeds are
present, power is always drawn from feed 0. Power will be drawn from feed 1 only if feed
0 fails.
Figure 139: Selecting DC Power (240 V China) Subsystem Feed Redundancy
3. Using both hands, grasp the handle and slide the PSM straight into the chassis until the PSM is fully
seated in the chassis slot. Tighten the two captive screws (see
10 lb-in. (1.13 Nm) to 12 lb-in. (1.35 Nm) of torque to each screw. Do not overtighten the screws.
Figure 140 on page 315). Apply between
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