Installing Mx2000 Router Dc Power Supply Modules (-48 V) - Juniper MX2010 Hardware Manual

Figure 188: Installing an MX2008 Router AC Power Supply Module

Installing MX2000 Router DC Power Supply Modules (-48 V)

To install an MX2000 DC PSM (-48 V):
1. Verify that the power switches on all PSMs are in the off (O) position.
2. On the PSM, slide the plastic cover away from the input mode switch to expose the dual DIP switches.
Move the input mode DIP switch 0 (left switch) to the ON position for the bottom feed INP0 (expected
to be connected), and DIP switch 1 (right switch) to the ON position for the top feed INP1 (expected
to be connected). If both DIP switches 0 and 1 are turned to the ON position, then both top and bottom
feeds are expected to be connected, (see
In addition, a PSM failure triggers the alarm LED on the craft interface.
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 169 on page 377).
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