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Connect AC Power Supply Modules
Copyright © 2017, Juniper Networks, Inc.
To install an MX2008 AC power supply module (PSM):
Verify that the power switch on the PSM is in the off (
1.
Figure 38 on page
53).
Move the input mode DIP switch
2.
feed
(expected to be connected), and DIP switch
INP0
position) for the top feed
and
are turned to the
1
be connected (see
Figure 38 on page
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
Ensure that the voltage across the AC power source cable leads is 0 V and that there
3.
is no chance that the cable leads might become active during installation.
Using both hands, slide the PSM straight into the chassis until the PSM is fully seated
4.
in the chassis slot. Tighten the two captive screws to secure the PSM to the chassis.
Verify that the
or
5.
INP0
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
Table 8 on page
54).
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
6.
the strap to one of the ESD points on the chassis.
Move the switch to the on (
7.
(left switch) to the
0
INP1
(expected to be connected). If both DIP switches
position, then both top and bottom feeds are expected to
ON
53).
ON
0
1
LEDs on the PSM are lit green steadily. The
Figure 39 on page 55
) position.
|
Connect AC Power Supply Modules
O
) position (see
(top position) for the bottom
ON
(right switch) to the
1
ON
or
INP0
and
(top
0
INP1
53
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