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 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 37: 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 will be lit yellow if that input’s voltage is in reverse polarity. Check the polarity
of the power cables to fix the condition (see
and
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
for information
on MX2010 AC PSM LEDs.
NOTE:
The MX2010 systems configured for three-phase wye AC input
power must use only three-phase wye AC PDMs and AC PSMs. Systems
configured for three-phase delta AC input power must use three-phase
delta AC PDMs and AC PSMs. AC and DC PSMs or PDMs must not be
mixed within a single system.
55
Copyright © 2014, Juniper Networks, Inc.
Connect AC Power Supply Modules
