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Network Processing Engine and Network Services Engine Installation and Configuration
OL-4448-12
Chapter 7 NPE-G1 and NPE-G2 Installation and Configuration Information
Removing the Network Processing Engine
Warning
Before completing any of the following steps, and to prevent short-circuit or shock hazards, 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 position, and
tape the switch handle of the circuit breaker in the OFF position.
Statement 332
Warning
When you install the unit, the ground connection must always be made first and disconnected last.
Statement 42
Step 1 At the rear of the router, check that the power switch on the power supply is in the off (O) position. (For
the Cisco
7200 VXR routers, see Figure 7-3.)
Step 2 Ensure that no current is running through the –V and +V leads. 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
position, and tape the switch handle of the circuit breaker in the off position.
Step 3 Disconnect the –V and +V leads. You can leave the ground cable connected.
For a Cisco 7200 VXR router, remove the cable tie that secures the –V, +V, and ground leads to the power
supply faceplate. Save the cable tie.
Note The cable tie that accompanied your Cisco 7200 VXR router DC-input power supply can be
removed and replaced on the power supply without the use of a tool. If you secured the DC-input
power supply leads to the power supply faceplate using a different type of cable tie, use a wire
stripper to cut that cable tie from the power supply.
Figure 7-3 Disconnecting Power from a Cisco 7200 VXR Router DC-Input Power Supply
Step 4 Using a 3/16-inch flat-blade screwdriver, loosen the screw below the +V lead receptacle and pull the lead
from the connector. See
Figure 7-3.
1 DC-input receptacle 3 Power switch
2 Internal fans 4 DC-input power supply
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networking xxxx engine
1 2
3 4