Mx2020 Dc Power Distribution (240 V China) Description - Juniper MX2020 Hardware Manual

WARNING:
CAUTION:
drape where people could trip on them.
RELATED DOCUMENTATION
MX2020 DC Power Distribution Module (-48 V) Description | 107
MX2020DC Power Supply Module (-48 V) Description | 112
Connecting Power to a DC-Powered MX2020 Router with Power Distribution Modules (-48 V) | 317
Installing MX2000 Router DC Power Supply Modules (-48 V) | 309
Replacing an MX2020 DC Power Distribution Module Cable | 648
Connecting an MX2000 DC Router Power Distribution Module (-48 V) Cable | 322
DC Power Cable Specifications for the MX2020 Router | 216

MX2020 DC Power Distribution (240 V China) Description

Most sites distribute DC power through a main conduit that leads to frame-mounting DC power distribution
panels, one of which might be located at a location near the rack that houses the router. The 240 V China
PDM cable connects the PDM to the power distribution panel and safety ground connection.
The PSMs can be connected to two separate feeds from different sources that are used for feed redundancy.
There are up to four PDMs located in slots PDM0/Input0, PDM2/Input0, PDM1/Input1, and PDM3/Input1.
Each feed (feed A or feed B) is connected from one source to one PDM and feeds from the other source
to the second PDM of the DC power system. This configuration balances power draw for the system using
the commonly deployed A/B feed redundancy.
Each subsystem provides N+1 PSM redundancy along with N+N feed redundancy. If both DC feeds are
available, operating power draws from the feed with higher voltage.
For field-wiring connections, use copper conductors only.
Power cords and cables must not block access to device components or
203