7for power cord connection methods and steps to connect the -48V DC and RPS power cords. Toconnect an AC power cord, follow these steps:1. Wear an ESD-preventive wrist strap, ensure a good skin contact and make sure that the ESD-preventive wrist strap is properly grounded.2. Install the bail latch to prevent the AC power cord from accidentally falling off. Fix the baillatch into the holes located at the two sides of the AC power receptacle. Then pull the baillatch upwards.3. Connect one end of the AC power cord to the AC receptacle on the switch.4. Pull the bail latch down to secure the plug to the AC receptacle.5. Connect the other end of the AC power cord to the external AC power supply system.6. Check whether the system status LED (PWR/SYS) on the front panel of the switch is ON. Ifthe LED is ON, it shows the power cord is properly connected.Install an interface moduleEach S5500-EI and S5500-SI switch (except S5500-20TP-SI) provide two interface module slotson the rear panel.The installation and removal of various interface modules are similar. This section describes theinstallation and removal of the Dual-Port 10 GE SFP+ Interface Module (LSPM2SP2P) forillustration. For information on installing a dedicated CX4/SFP+ cable, see the S5500-EI andS5500-SI Installation Guide.1. Wear an ESD-preventive wrist strap, ensure a good skin contact and make sure that the ESD-preventive wrist strap is properly grounded.2. Loosen the mounting screws of the filler panel on the interface card slot of the switch's frontpanel with a Phillips screwdriver and remove the filler panel.3. Unwrap the interface card. Gently push the interface card in along the slot guide rails untilthe interface card is in close contact with the switch. Then push the ejector levers at bothsides inward.4. Tighten the captive screws with a Phillips screwdriver to fix the interface card.S5500-EI only: installing switches for an IRFThe S5500-EI series support the IRF function. You can install IRF-capable interface modules toconnect multiple switches through the 10 GE ports to form a logical entity. See the S5500-EI andS5500-SI Installation Guide for more information.Verify the installationBefore powering on the S5500-EI and S5500-SI series switch, check the following items are inplace:• There is enough space for heat dissipation around the switch, and the rack or workbench isstable.