
Chapter 1 Product Overview
Physical and Functional Description of Router
Figure 1-8  DC-Input  Power Shelf Connections
B1
A1- A1+ A2- A2+ | B2+ B2- B1+ B1- | Ground | 
27964
Cover with slotted screw hole; fastens to standoff in middle of cable connection area
  | Cisco XR 12416 Router Installation Guide |