11Installing a power module1. Wear an ESD wrist strap and make sure it makes good skin contact and is reliably grounded.2. Unpack the power module and verify that the power module model is as required.3. Remove the filler panel (if any) from the target slot.If you require only one power module, install it in power module slot 1 and make sure a fillerpanel is installed in power module slot 2.4. Orient the power module with the upside up. Grasp the handle of the power module with onehand and support its bottom with the other, and slide the power module slowly along the guiderails into the slot. See callout 1 in Figure 16.To prevent damage to the power module and the connector on the switch backplane, insert thepower module gently. If you encounter a hard resistance or the power module tilts whileinserting the power module, pull out the power module, realign it with the slot, and then insert itagain.5. Fasten the captive screws on the power module with a Phillips screwdriver to secure the powermodule in the chassis. See callout 2 in Figure 16.If the captive screw cannot be tightly fastened, examine the installation of the power module.Figure 16 Installing a PSR150-A power moduleRemoving a power module1. Wear an ESD wrist strap and make sure it makes good skin contact and is reliably grounded.2. Power off the power module and remove the power cord.3. Loosen the captive screws on the power module with a Phillips screwdriver until they arecompletely disengaged from the chassis.4. Grasp the handle of the power module with one hand and pull the module part way out. Supportthe module bottom with the other hand, and pull the power module slowly along the guide railsout of the slot.5. Place the removed power module in an antistatic bag.