Datasheet

power indefinitely. For more information about AC power supplies, see “M7i AC Power

Supply” on page 24.

To replace an AC power supply, perform the following procedures:

•

Removing an M7i AC Power Supply on page 112

•

Installing an M7i AC Power Supply on page 113

Removing an M7i AC Power Supply

Before removing the AC power supply from an M7i router with only one power supply,

you must power off the router. See “Powering Off the M7i Router” on page 64. The AC

power supplies are located at the bottom rear of the chassis, as shown in Figure 2 on

page 6. Each AC power supply weighs approximately 12 lb (5.5 kg).

CAUTION: Do not leave a power supply slot empty for more than a short time

while the router is operational. The power supply must remain in the chassis

for proper airflow.

To remove an AC power supply (see Figure 52 on page 113):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect

the strap to one of the ESD points on the chassis. Verify that the router is attached to

a proper earth ground.

2. Press the power switch on the power supply faceplate to the OFF (O) position.

NOTE: If you are not removing the power supply, but simply powering it

off,wait at least 60 seconds beforeturning it back on. Ifyouneed to power

it off again, wait for at least 60 seconds after powering it on.

3. Unplug the power cord from the appliance inlet on the faceplate.

4. Loosen the thumbscrew at each corner of the power supply faceplate, using a Phillips

screwdriver if necessary.

5. Grasp the handle on the power supply faceplate and pull firmly to slide the unit about

halfway out of the chassis.

6. Place one hand under the power supply to support it, then slide it completely out of

the chassis.

M7i Multiservice Edge Router Hardware Guide