Mx2010 Dc Power Distribution (240 V China) Description - Juniper MX2010 Hardware Manual

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MX2010 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 two PDMs located in slots PDM0/Input0 and PDM1/Input1 that are capable of carrying nine

feeds each. Each feed 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 by using

the commonly deployed A/B feed redundancy.

Each system 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. ). Each set of power cables powers a

single DC PSM and is capable of delivering 2500 W of power. If feeds that connect to one PDM fail in a

redundant configuration, the other feed starts to provide full power.

Figure 74 on page 200

shows a typical DC source cabling arrangement.

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