Connecting A Dc Pdu And Dc Pem Assembly - Cisco 12404 Installation And Configuration Manual

Chapter 3 Installing the Cisco 12404 Internet Router

Connecting a DC PDU and DC PEM Assembly

Caution
Warning
Step 1
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Each DC PDU should be connected to separate DC sources using six threaded
terminals. Two terminals for negative (source DC), two terminals for positive
(source DC return), and two terminals for ground. The DC power cable leads
should be 6 American Wiring Gauge (AWG) high strand count wire. The PEM
accepts DC power source voltage from a dedicated 35–Amp service DC power
source operating between -48 to -60 VDC.
The DC PEM and DC PDU assembly weighs 14.0 pounds (6.35 kg.). Use two
hands when handling the power supply.
Power to your router must be Off and all cables disconnected before you install
the DC power assembly. The DC PDU and DC PEM when connected, is not a
hot-swappable, field replaceable unit.
Use this procedure to install the DC PEM and DC PDU in your router. The
DC power module housing is located at the rear of the chassis.
Attach an ESD-preventive strap to yourself and to either the chassis, or to a bare
metal surface.
Insert the DC power module into the power module bay at the rear of the chassis
Press the power supply against the backplane until the connectors are seated
against the backplane receptacles.
Figure 3-21 shows the rear view of a Cisco 12404 router with the DC PDU
•
installed.
Tighten all of the captive screws on the faceplate.
All electrical connections between the power supply and the backplane are
•
made automatically when the power supply is fully inserted in the power
supply bay.
Cisco 12404 Internet Router Installation and Configuration Guide

Connecting a DC PDU and DC PEM Assembly

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