■ Replacing a Member Switch of a Virtual Chassis Configuration (CLI
Procedure) on page 114
■ Reverting to the Default Factory Configuration for the EX-series Switch
Connecting Earth Ground to an EX-series Switch
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. The protective earthing terminal is located on the left side of the chassis in
an EX 4200 switch when you look at it from the front. The protective earthing terminal
is located on the rear of the chassis in an EX 3200 switch.
An AC-powered EX-series switch chassis gets additional grounding when you plug
the power supply in the switch into a grounded AC power outlet by using an AC
power cord appropriate for your geographical location (see “AC Power, Connection,
and Power Cord Specifications” on page 56).
Ensure you have the following tools and parts available to connect an EX-series switch
to earth ground:
■ Electrostatic discharge (ESD) grounding strap
■ Grounding cable
■ Washers and 10-32x.25 in. screws to secure the grounding lug to the protective
earthing terminal
■ Phillips (+) screwdriver, number 2
Ensure you understand how to prevent ESD damage (see “Preventing Electrostatic
Discharge Damage” on page 138).
Ensure that a licensed electrician has attached an appropriate grounding lug to the
grounding cable.
CAUTION: Using a grounding cable with an incorrectly attached lug can damage the
switch.
To connect an EX-series switch chassis to earth ground (see Figure 41 on page 79):
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and
connect the strap to the ESD point on the chassis.
2. Connect one end of the grounding cable to a proper earth ground, such as the
rack in which the switch is installed.
3. With a Phillips (+) screwdriver, number 2, remove the screws and washers from
the protective earthing terminal on the chassis.
78 ■ Connecting Earth Ground to an EX-series Switch
Complete Hardware Guide for EX 3200 and EX 4200 Switches
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