Cisco XR 12404 - Manual (Page 91)

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Cisco XR 12404 Router Installation Guide
OL-13830-02
Chapter 3 Installing the Router
Connecting to a DC Power Source
Step 6 Connect the other end of the AC power cord to the AC power source outlet.
Note We recommend attaching each AC PEM 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.
Note When operating your router on an AC power source, both PEM bays must
have all AC PEMs installed to ensure compliance with regulatory EMI
standards.
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.
Warning 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.
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.
Caution The DC PEM and DC PDU assembly weighs 14.0 pounds (6.35 kg.). Use two
hands when handling the power supply.
todd.book Page 26 Monday, March 16, 2009 2:47 PM