Cisco Systems XR 12406 manual Connecting to a DC Power Source

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.

	Cisco XR 12406 Router Installation Guide
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