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Chapter 4
Installing a Cisco 6260 Without a POTS Splitter Configuration
4.2.7 Attach Cisco 6260 Power Connections
External power is supplied to the system as –48 VDC from the central office (CO) power source or
rectifier to the fuse and alarm panel. Power is fed from the fuse and alarm panel to receptacles in terminal
blocks located on the power entry modules (PEMs) installed in the Cisco 6260 chassis.
Connect the power connections on each PEM to separate power sources to achieve full power redundancy. If
you do not require power redundancy, use the terminals on a single PEM, or connect both PEMs to a single
power source.
Complete these instructions to connect the Cisco 6260 system to a –48 VDC power source. Ground the
chassis before you attempt this procedure, as described in the
page
See
Note
minimum power requirements for your system.
To prevent the system from powering up, do not install the fuses at this time. If the fuses are already
Caution
installed in the fuse and alarm panel, remove them. You can replace the fuses after the system is installed
and connected.
Follow these instructions to attach the power connections to the Cisco 6260 PEM:
Step 1
Verify that power in the DC circuit is off.
Warning
Before connecting or disconnecting ground or power wires to the chassis, ensure that power is
removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel
board that services the DC circuit, switch the circuit breaker to the OFF (0) position, and tape the
switch handle of the circuit breaker in the OFF (0) position. Use a voltmeter to test for 0 (zero) voltage
at the power terminals on the chassis.
Connect a grounding strap to the ESD grounding jack that is located on the top right of the front of the
Step 2
Cisco 6260 chassis.
Step 3
Prepare the wire for the Cisco 6260 power and grounding connections, as follows:
a.
b.
c.
d.
OL-2365-02
4-7.
Chapter 2, "Preparing for Installation,"
Measure enough wire (6 to 10 AWG multistranded copper wire) to connect each of the PEM power
connections to the fuse and alarm panel, as well as enough to connect the grounding receptacle on
the PEM terminal block to the grounding connection at the DC power source.
Cut the ends of the power and ground wires so that the ends are straight, not slanted.
Measure 0.43 inch (11 mm) up from the end of each power and ground wire and place a mark at that
point. These are the wire ends that will be connected to the Cisco 6260.
Use the wire stripping tool to remove 0.43 inch (11 mm) of the covering from both ends of each
wire. Trim the ends of the covering so that they are straight, as shown in
"Ground the Cisco 6260" section on
for the calculation tables that you need to determine the
Cisco 6260 Hardware Installation Guide
Installation Procedures
Figure
4-5, not slanted.
4-9
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