Ol-32185-02 - Cisco 4451 ISR Hardware Installation Manual

Remove and Replace Cisco 4000 Series ISRs Power Supplies
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Wire the DC Input Power Source on Cisco 4331 ISR
The Cisco 4331 ISR DC power supply supports 12V/21A output with the DC input range from 24 to 60
VDC.
Note
The input current should be less than 6.3 A at 48 VDC. It is recommended to use slow blow fuse and
have the input fuse value less than or equal to 25 A.
The Cisco 4331 ISR DC power supply has a terminal block that is installed into the power supply
terminal block header.
To wire the DC input power source:
Step 1
Ensure that the power switch is in the Standby position.
Step 2
Insert the power supply in the power-supply slot, and gently push it into the slot.
Step 3
Wire can be stripped and terminated directly to the power supply terminal block, or a crimp style spade
terminal lug can be used. If you are using a terminal lug, follow the manufacturer's instructions for
terminating the lug to the wire. If terminating directly to the terminal block using bare wire, follow the
instructions in the
DC input power source and strip the wires to approximately 0.39 inch (10 mm) + 0.02 inch (0.5 mm). It
is recommended that 14 AWG insulated wire be used. Do not strip more than the recommended length
of wire because doing so could leave the wire exposed from the terminal block.
stripped DC input power source wire.
Figure 6-38
1
An exposed wire lead from a DC input power source can conduct harmful levels of electricity. Be
Warning
sure that no exposed portion of the DC input power source wire extends from the terminal block.
Statement 122
Hardware Installation Guide for Cisco 4000 Series Integrated Services Routers
6-52
The color coding of the DC input power supply leads depend on the color coding of the DC power
source at your site. Ensure that the lead color coding you choose for the DC input power supply
matches the lead color coding used at the DC power source and verify that the power source is
connected to the negative (–) terminal and to the positive (+) terminal on the power supply.
Ensure that the chassis ground is connected on the chassis before you begin installing the DC power
supply. Follow the steps provided in the
Figure 6-32. Use a wire-stripping tool to strip each of the two wires coming from the
Stripped DC Input Power Source Wire
1
0.39 inch (10 mm) is the recommended wire-strip length for the terminal block.
Chapter 6 Install and Upgrade Internal Modules and FRUs
"Chassis Grounding" section on page 3-19.
Figure 6-33 shows a

OL-32185-02