Connect Dc Power Supply Modules - Juniper MX2010 Manual

applied. Use only a torque-controlled driver or socket wrench to tighten nuts on the
DC PDM terminal studs.
NOTE: For information about connecting to DC power sources, see the
Routing Platform Hardware
9. Connect each DC power cable to the appropriate external DC power source.
NOTE: For information about connecting to external DC power sources, see the
Universal Routing Platform Hardware
10. Switch on the external circuit breakers to provide voltage to the DC power source cable leads.
NOTE: Each PDM must be connected to a dedicated 60 Aor 80 A DC circuit breaker for the
DC power source. The PDM has a switch to accommodate DC circuit breaker amperage.
11. Verify that the power cabling is correct, that the cables are not touching, and that they do not block
access to router components or drape where people could trip on them.
12. Close the cable restraint cover over the terminal studs, and tighten the captive screws.

Connect DC Power Supply Modules

To install an MX2010 DC PSM:
1. Verify that the power switch on the PSM is in the off (O) position (see
2. Move the input mode DIP switch 0 (left switch) to the ON (top position) for the bottom feed INP0
(expected to be connected), and DIP switch 1 (right switch) to the ON (top 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
The DC power subsystem is feed redundant. Each DC PSM can be connected to two separate feeds
from different sources that are used to provide feed redundancy. If two feeds are connected, PSM
input power is drawn from the feed with the higher voltage present. There are two PDMs per power
subsystem capable of carrying nine feeds each. Connect feeds from one source to one PDM and
feeds from the other source to the second PDM of the power subsystem. The primary input of the
PSM is a dual redundant feed, labeled INP0 and INP1. Both feeds are active during operation, but
both feeds might or might not be providing current. In addition, a PSM failure triggers the alarm LED
Guide.
Guide.
MX2010 Universal
MX2010
Figure 42 on page
Figure 42 on page 75).
74
75).