You do not need to connect power to both P-A and P-B feeds for each DC Power
Module. The DC Power Modules can operate even with one power input
connected.
Note
• Each DC input power cable is terminated at the FPEM by a cable lug (included in the accessory kit). The
cable lugs must be dual-hole, and have a 90 degree tongue (reference Panduit LCD4-14AF-L). They
must be able to fit over 1/4-20 terminal studs on 0.625 in (15.88 mm) centers and have a maximum
tongue width of 0.6 inches.
DC input power cables must be connected to the FPEM terminal studs in the
proper positive (+) and negative (-) polarity. Some DC cable leads are labeled,
which is a relatively safe indication of the polarity. However, you must verify
the polarity by measuring the voltage between the DC cable leads. When
measuring the voltage, the positive (+) lead and the negative (-) lead must always
match the (+) and (-) labels on the power distribution unit.
Note
• To avoid hazardous conditions, all components in the area where DC input power is accessible must be
properly insulated. Therefore, before installing the DC cable lugs, ensure to insulate the lugs according
to the manufacturer's instructions.
Before installing the DC cable lugs, insulate the entire 90 degree portion of the
lugs where the wire is crimped to avoid hazardous conditions where DC input
power is accessible through the terminal block cover of the DC FPEM.
Caution
Required Tools and Equipment
• Insulating sleeving
• Torque wrench
• 7/16" hex socket
• Lugs for the cables
• Cables for positive and negative leads
• Crimping tool
Step 1 Ensure that the power switch on the DC FPEM is in off (down) position.
Step 2 Attach the lug to the lead cable. Carefully crimp the receptacle around the cable using the crimping tool. Insulate the
entire 90 degree portion of the lug with shrink sleeving for each lead wire.
Step 3 Remove the terminal block cover on each terminal block by pushing down on the bottom tab then pivoting the bottom
out.
Cisco Converged Broadband Routers Hardware Installation Guide
87
Installing the Power System in the Cisco cBR Chassis
Connecting Power to the DC-Powered Cisco cBR Chassis
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