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Connect the EX4100 to Power

Connect Earth Ground to an EX4100 Switch

To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you must connect EX4100 switch models to earth ground before you connect power to the switch. You must use the protective earthing terminal on the switch chassis to connect the switch to earth ground.

You must install the EX4100 switches in a restricted-access location and ensure that the chassis is always properly grounded. EX4100 switches have a two-hole protective grounding terminal on the rear panel of the chassis. Under all circumstances, use this grounding connection to ground the chassis. For AC-powered systems, you must also use the grounding wire in the AC power cord along with the two-hole grounding lug connection. This tested system meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.

CAUTION:

Ensure that a licensed electrician has attached the appropriate grounding lug to the grounding cable that you supply. Using a grounding cable with an incorrectly attached lug can damage the switch.

Before you connect earth ground to a EX4100 switch, ensure that you have parts and tools listed in Table 1 available:

Table 1: Parts Required for Connecting an EX4100 Switch to Earth Ground
Item Switch Models Description
Earthing terminal location

All EX4100 switches and EX4100-F switches

 Rear panel of the chassis
Grounding cable requirements All EX4100 switches 8 AWG (8 mm²), minimum 90° C wire, or as permitted by the local code—not provided
Grounding lug specifications All EX4100 switches

Panduit LCD8-14A-L or equivalent—not provided
Screws to secure the grounding lug All EX4100 switches Two M5X10mm screws with washer—seperately orderable
Tools required All EX4100 switches

Number 2 Phillips (+) screwdriver—not provided

Electrostatic discharge (ESD) grounding strap—not provided

To ground the EX4100 switch to a proper ground reference:

  1. Connect one end of the grounding cable to a proper earth ground, such as the rack in which the switch is mounted.
  2. Place the grounding lug attached to the grounding cable over the protective earthing terminal on the rear panel (see Figure 1).
    Figure 1: Connect a Grounding Cable to an EX4100-24P, EX4100-24T, EX4100-48P, EX4100-48T, EX4100-24MP, and EX4100-48MP Switch Connect a Grounding Cable to an EX4100-24P, EX4100-24T, EX4100-48P, EX4100-48T, EX4100-24MP, and EX4100-48MP Switch
  3. Secure the grounding lug to the protective earthing terminal with the screws.
  4. Secure the grounding cable and ensure that it does not touch or block access to other switch components.
    Warning:

    Ensure that the cable does not drape where people could trip over it.

Connect AC Power to an EX4100 Switch

Before you connect AC power, ensure that you have the following parts and tools available:

  • A power cord appropriate for your geographical location

  • A power cord retainer clip (provided with the switch)

Ensure that you have connected the device chassis to earth ground. The AC power cords also provide additional grounding when you connect the power supply in the switch to a grounded AC power outlet by using the AC power cord appropriate for your geographical location (see Table 10).

CAUTION:

For installations that require a separate grounding conductor to the chassis, have a licensed electrician complete this connection before you connect the switch to power. For instructions on connecting earth ground, see Connect Earth Ground to an EX4100 Switch.

You install the power supply in the power supply slot on the rear panel of the switch.

To connect AC power to the switch:

  1. On the rear panel of the switch, push the end of the power cord retainer strip into the slot above the power cord inlet until the strip snaps into place. Ensure that the loop in the retainer strip faces the power cord (see Figure 2).

    The power cord retainer clip extends out of the chassis by 3 in. (7.62 cm).

  2. Press the small tab on the retainer strip to loosen the loop. Slide the loop until you have enough space to insert the power cord coupler into the power cord inlet.
  3. Locate the power cord or cords shipped with the switch. The cords have plugs appropriate for your geographical location. See Figure 3.
    Warning:

    Ensure that the power cord does not block access to switch components and that it is secured to prevent people from tripping on it.
  4. Insert the power cord coupler firmly into the power cord inlet (see Figure 3).
  5. Slide the loop toward the power supply until it is snug against the base of the coupler.
  6. Press the tab on the loop and draw out the loop into a tight circle.
  7. If the AC power source outlet has a power switch, set it to the OFF (0) position.
  8. Insert the power cord plug into an AC power source outlet.
  9. If the AC power source outlet has a power switch, set it to the ON (|) position.
Figure 2: Connecting an AC Power Cord Retainer Clip to the AC Power Cord Inlet on an EX4100 Switch Connecting an AC Power Cord Retainer Clip to the AC Power Cord Inlet on an EX4100 Switch
Figure 3: Connecting an AC Power Cord to the AC Power Cord Inlet of an EX4100 Switch Connecting an AC Power Cord to the AC Power Cord Inlet of an EX4100 Switch

Connect DC Power to an EX4100 Switch

Before you begin connecting DC power to the switch, ensure that you have connected earth ground to the switch chassis.

CAUTION:

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the switch to earth ground before you connect them to power. For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the switch chassis to connect to the earth ground. For instructions on connecting earth ground, see Connect Earth Ground to an EX4100 Switch.
Note:

You must grounding DC systems. We recommend grounding for AC systems.

Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

Before you connect power, install the power supply in the chassis. For instructions on installing a DC power supply in an EX4100 switch, see Install a DC Power Supply in an EX4100 Switch.

Ensure that you have the following parts and tools available:

  • DC power source cables (14–16 AWG) (not provided)

  • Wire pins (Molex 192120005) (not provided)

  • Terminal connector (provided)

  • Phillips (+) screwdriver, number 2

  • Slotted (-) screwdriver

You install the power supply in the power supply slot in the rear panel.

Warning:

DC-powered switches are intended for installation only in a restricted-access location.

To connect DC power to the switch:

  1. Ensure that the input circuit breaker is open so that the cable leads do not become active while you connect DC power.
    Note:

    The DC power inlet in the switch has two terminals labeled + and – and has a terminal to connect to earth ground.
    Note:

    The + terminal is referred to as +RTN and the – terminal is referred to as –48 V in DC Power Wiring Sequence Warning and DC Power Electrical Safety Guidelines.
  2. Use the screwdriver to loosen the screws on the terminal connector.
  3. Strip 0.25 inch (6.35 mm) of the insulator from one end of the power cable. Attach the two wires to the wire pins.
  4. Secure the wire pins to the appropriate terminals on the terminal connector by using the screws from the terminal connector (see Figure 4).
    Figure 4: Securing Wire Pins to the Terminals on the Terminal Connector Securing Wire Pins to the Terminals on the Terminal Connector

    • To connect the wire pins to the appropriate terminals on the terminal connector:

      1. Connect the positive (+) wire pin to the + terminal on the terminal connector.

      2. Connect the negative (–) wire pin to the – terminal on the terminal connector.

      3. Ensure that the pins are fully inserted into the terminal connector.

      4. Use the screwdriver to tighten each screw on the terminal connector until snug. Do not overtighten. Apply 4.5 lb-in. (0.51 Nm) of torque to the screws.

  5. Insert the terminal connector (with the power cable attached) into the power supply socket on the switch and secure it by tightening the two screws on either side of the terminal connector (see Figure 5).
    Figure 5: Securing the Terminal Connector to the DC Power Inlet Securing the Terminal Connector to the DC Power Inlet
    Note:

    To supply sufficient power, terminate the DC input wiring on a facility DC source that is capable of supplying a minimum of 7.5 A at –48 VDC.
  6. Connect the other end of the power cable to the power source.
  7. Close the input circuit breaker.
  8. Verify that the IN OK and the OUT OK LEDs are lit green and on steadily.