Mx2020 Dc Power Distribution Module (-48 V) Description - Juniper MX2020 Hardware Manual

Table 29: MX2020 AC Power Supply Module LEDs
Label Color
PWR OK Green
Yellow
—
FAULT Red
—
INP0 Green
Yellow
—
INP1 Green
Yellow
—
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MX2020 DC Power Distribution Module (-48 V) Description

In the DC power configuration, the MX2020 router contains up to four DC PDMs located at the rear of
the chassis in slots PDM0/Input0 through PDM3/Input1 (bottom to top). A minimum of one PDM is
required per subsystem (two PDMs per MX2020 chassis) for nonredundant power. The DC PDMs provide
power interface to seven or nine power supply modules (PSMs).
Four PDMs provide full redundancy for the MX2020 router. In a redundant configuration, a total of
twenty-eight 60-A or 80-A feeds (7-feed DC PDMs), and a total of thirty-six 60-A or 80-A feeds ( 9-feed
DC PDMs) are supported.
State Description
On Power is functioning normally with no alarms.
On PSM controller is functioning normally.
Off PSM is not functioning normally or the AC input voltage is out of range.
On PSM is not functioning normally or the AC input voltage is out of range.
Off PSM is functioning normally.
On AC input is within the required voltage range and the DIP switch is set to
on.
On AC input is out of the required voltage range.
Off AC input to the PSM is not present.
On AC input is within the required voltage range and the DIP switch is set to
on.
On AC input is out of the required voltage range.
Off AC input to the PSM is not present.
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