Connecting AC Power to an EX-series Switch
The power supply in an EX-series switch is a hot-removable and hot-insertable field-replaceable unit (FRU) located on the rear panel.
Caution: To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, EX-series switches must be adequately grounded before they are connected to power. For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the EX-series switch chassis to connect to the earth ground. For instructions on connecting an EX-series switch to ground using a separate grounding conductor, see Connecting Earth Ground to an EX-series Switch. An EX-series switch gets additional grounding when you plug the power supply in the switch into a grounded AC power outlet by using the AC power cord appropriate for your geographical location (see AC Power, Connection, and Power Cord Specifications).
Ensure you have the following tools and parts available:
- Electrostatic discharge (ESD) grounding strap
- Grounding cable
- Power cord appropriate for your geographical location
Ensure you understand how to prevent ESD damage (see Preventing Electrostatic Discharge Damage).
To connect AC power to an EX-series switch:
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
- Ensure that the power supplies are fully inserted in the chassis and the screws on their faceplates are tightened.
- Squeeze the two sides of the power cord retainer clip, and insert the L-shaped ends of the wire clip into the holes in the bracket on each side of the AC appliance inlet on the AC power supply faceplate (see Figure 1).
- Locate the power cord or cords shipped with the switch; the cords have plugs appropriate for your geographical location. See AC Power, Connection, and Power Cord Specifications.
- Insert the coupler end of the power cord into the AC appliance inlet on the AC power supply faceplate.
- Push the cord into the slot in the adjustment nut of the power cord retainer. Turn the nut until it is tight against the base of the coupler and the slot in the nut is turned 90° from the top of the switch (see Figure 2).
- If the AC power source outlet has a power switch, set it to the OFF (0) position.
- Insert the power cord plug into an AC power source outlet.
- If the AC power source outlet has a power switch, set it to the ON (|) position.
- Verify that the AC OK LED on the power supply is lit and is on steadily.
Figure 1: Connecting the AC Power Cord Retainer Clip to an AC Power Supply in an EX-series Switch
Figure 2: Connecting an AC Power Cord to an AC Power Supply in an EX-series Switch
Note: Each power supply must be connected to a dedicated power source outlet.
Warning: Ensure that the power cord does not block access to switch components or drape where people can trip on it.
Table 1 describes the LEDs on the AC power supplies in EX-series switches.
Table 1: EX-series Switch—AC Power Supply LEDs
Note: If AC OK LED and DC OK LED are unlit, it indicates that either the AC power cord is not installed properly or the power supply fuse has failed. If AC OK LED is lit and DC OK LED is unlit, it indicates that the AC power supply is not installed properly or the power supply has an internal failure.