Juniper MX2008, Быстрый старт

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but both feeds might or might not be providing current. In addition, a PSM failure
triggers the alarm LED on the craft interface. Each PDM has an LED per feed indicating
whether the feed is active or not, or whether the feed is connected properly.
Figure 41: Selecting DC Power Subsystem Feed Redundancy
PWR OK FAULT
INP0 INP1
1 0
ON
g007109
3.
Ensure that the voltage across the DC power source cable leads is 0 V and that there
is no chance that the cable leads might become active during installation.
4.
Using both hands, slide the PSM straight into the chassis until the PSM is fully seated
in the chassis slot. Tighten the two captive screws to secure the PSM to the chassis.
NOTE: The MX2008 systems configured for DC input power must use
only DC PDMs and DC PSMs. AC and DC PSMs or PDMs must not be mixed
within a single system.
5.
Verify that the INP0 or INP1 LED on the PSM is lit green steadily. The INP0 or INP1 LED
is lit yellow if that input’s voltage is in reverse polarity. Check the polarity of the power
cables to fix the condition (see
Figure 42 on page 59 and Table 10 on page 59 ).
6.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to one of the ESD points on the chassis.
7.
Move the switch to the on ( | ) position.
8.
Verify that the PWR OK LED is lit green steadily. See Table 10 on page 59 for information
about MX2008 DC PSM LEDs.
Copyright © 2017, Juniper Networks, Inc. 58
MX2008 3D Universal Edge Router Quick Start