Replacing an M10i AC Power Supply

An AC-powered router has up to three load-sharing AC power supplies. The router must have at least two AC power supplies, and any two AC power supplies can provide full power to the router. Three power supplies are required for redundancy. A redundant power supply is hot-removable and hot-insertable, as described in M10i Field-Replaceable Units (FRUs). For M10i routers with only two AC power supplies, you must power off the router before replacing an AC power supply.

1. Removing an M10i AC Power Supply
2. Installing an M10i AC Power Supply

Removing an M10i AC Power Supply

The AC power supplies are located at the bottom rear of the chassis, as shown in M10i Chassis Description. For information about power supply redundancy and replaceability, see M10i Power System Description.

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 1):

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.
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 before turning it back on. If you need to power it off again, wait for at least 60 seconds after powering it on.

3. Unplug the AC power cord from the appliance inlet on the faceplate.
4. Loosen the thumbscrew at each end 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.

Figure 1: Removing an AC Power Supply

Installing an M10i AC Power Supply

To install an AC power supply (see Figure 2):

1. Verify that the switch on the power supply faceplate is in the OFF (O) position.
2. Locate the AC power cord shipped with the router, which should be appropriate for your geographical location (see M10i AC Power Cord Specifications).
3. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
4. Grasp the handle on the power supply faceplate with one hand and place the other hand under the supply to support it.
5. Align the rear of the supply with the slide guides inside the chassis and slide the supply into the chassis until it contacts the midplane.
6. Tighten (but do not overtighten) the thumbscrews on the power supply faceplate.
7. Insert the appliance coupler end of the AC power cord into the appliance inlet on the power supply faceplate and insert the plug into an AC power source receptacle. Verify that the AC power cord does not block access to router components or drape where people could trip on it.
8. Press the power switch on the faceplate to the ON ( | ) position. When the power supply has powered on successfully, the green OUTPUT OK LED lights steadily.

   Note: After powering off a power supply, wait at least 60 seconds before turning it back on. After powering on a power supply, wait at least 60 seconds before turning it off. If the router is completely powered off when you power on the power supply, the Routing Engine boots as the power supply completes its startup sequence. If the Routing Engine finishes booting and you need to power off the router again, see Powering Off an M10i Router . After a power supply is powered on, it can take up to 60 seconds for status indicators—such as the output status LED on the power supply, the command display output, and messages on the LED display on the craft interface—to indicate that the power supply is functioning normally. Ignore error indicators that appear during the first 60 seconds.

Figure 2: Installing an AC Power Supply