Juniper TX MATRIX Hardware Manual page 237

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Copyright © 2010, Juniper Networks, Inc.
NOTE: If 0 is displayed for the SCG/CB/SIB in the
fields for a PEM, and the voltage field does not match the other PEM, it
might indicate a difference between the DC input voltages applied to
and . Consider checking your DC power network for unintended voltage
PEM1
drops to the TX Matrix router.
The current sharing between PEMs relies on equal voltages at the input
terminals of the PEMs. The TX Matrix router system power is divided into
two load zones, one load zone consists of
the other load zone consists of
will occur only between the PEMs of each load zone (
therefore, those two PEMs voltages are the ones that should be equal for
current sharing. However, if the voltages do not match, the TX Matrix router
operates normally as long as the DC input voltages are within the operating
range.
Make sure that the power and grounding cables are arranged so that they do not
obstruct access to other TX Matrix router components.
Replacing a TX Matrix Power Supply Filter Element on page 289
TX Matrix Two-Input 160-A DC Power Supply LEDs on page 43 and
TX Matrix Three-Input 240-A Power Supply LEDs on page 46
Figure 146 on page 343
Table 34 on page 338
Chapter 22: Maintaining TX Matrix Router Hardware Components
INPUT 0
INPUT 1 of PEM0
Current , Power , and Load
PEM0
of and , while
PEM0 PEM1
and PEM1 . Load sharing
or );
INPUT 0 INPUT 1
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