Juniper PWR-MX960-DC-S
Juniper PWR-MX960-DC-S DC Power Entry Module
740-013683,COUPABZEAB
In the DC power configuration, the router contains either two or four DC power supplies , located at the lower rear of the chassis in slots PEM0 through PEM3 (left to right). You can upgrade your DC power system from two to four power supplies.