Juniper MX2008, Быстрый старт

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Connect AC Power Supply Modules
To install an MX2008 AC power supply module (PSM):
1.
Verify that the power switch on the PSM is in the off (
O
) position (see
Figure 38 on page 53 ).
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 Figure 38 on page 53 ).
The AC power system provides dual redundant feed. Each PSM takes in two AC feeds
and uses one of the two. Only one of the two feeds is active during power operation.
Each feed is a single-phase AC system 200–240 VAC derived from a three-phase
delta or wye AC input system. 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 38: Selecting AC Power Subsystem Feed Redundancy
PWR OK FAULT
INP0 INP1
1 0
ON
g007109
3.
Ensure that the voltage across the AC 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.
5.
Verify that the
INP0
or
INP1
LEDs on the PSM are lit green steadily. The
INP0
or
INP1
LEDs are lit yellow if that input’s voltage is in reverse polarity. Check the polarity of
the power cables to fix the condition (see
Figure 39 on page 55 and
Table 8 on page 54 ).
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.
53 Copyright © 2017, Juniper Networks, Inc.
Connect AC Power Supply Modules