Cisco XR 12406 - Manual (Page 117)

3-29
Cisco XR 12406 Router Installation Guide
OL-13831-01
Chapter 3 Installing the Cisco XR 12406 Router
Connecting to a DC Power Source
Step 4 Insert the plug end of each AC power cord into the AC power source outlet.
For full redundancy, connect each AC-input power supply to an independent
power circuit with its own circuit breaker. We also recommend that you use an
uninterruptable power source (UPS) to protect against power failures at your site.
Step 5 Verify that the AC power source circuit breaker servicing each of the AC-input
power supplies is switched on.
Connecting to a DC Power Source
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.
Note We recommend each DC PDU be connected to an independent power source for
full redundancy. We also recommend that you use an uninterruptable power
source (UPS) to protect against power failures at your site.
Use the following procedure to connect the router to a DC power source.
Warning The circuit breaker switch on the faceplate of the DC-input PEM should be in
the OFF position.
Step 1 Attach an ESD-preventive strap to your wrist and connect the leash to the chassis
or to another grounded, bare metal surface.