Cisco Systems CRS-1 manual Each set of cables RTN and -48V/-60V is a single VDC input

Chapter 2 Power and Cooling

DC Power Requirements

Figure 2-2 DC Earth Ground Cable Lug

End View

0.48Ø 0.267 2 holes

All measurements in inches

2.24

0.25 0.63 0.37 0.08

Crimp area

25527

Figure 2-3shows the DC input power cables connected to the DC PDU terminal studs.

Figure 2-3 DC PDU Power Cable Connections

1

129533

1

Each set of cables (RTN and –48V/–60V) is a single VDC input.

Note When wiring the PDU, be sure to attach the ground wire first (shown above on the far left side of PDU). When removing the wiring, be sure to remove the ground wire last.

Note The power wire and ground wire connector screws have a 20 in.-lb torque value. The mounting screws have a 9 in.-lb torque value.

The color coding of the DC input power cable leads depends on the color coding of the site DC power source. Typically, green or green and yellow indicates that the cable is a ground cable. Because there is no color code standard for the source DC wiring, you must ensure that the power cables are connected to the PDU terminal studs in the proper positive (+) and negative (–) polarity.

Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide

OL-5802-06 2-5