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Connecting the Optical ILA to Power

 

Connecting the Optical ILA Grounding Cable

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the chassis to earth ground before you connect it to power. For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the optical ILA chassis to connect to the earth ground.

Note

An AC-powered optical ILA gains additional grounding when you plug the power supply in the device into a grounded AC power outlet by using an AC power cord appropriate for your geographical location. See AC Power Cord Specifications for the Optical ILA.

Caution

Before you connect power to the optical ILA, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the optical ILA (for example, by causing a short circuit).

Note

Mount the optical ILA in the rack or cabinet before attaching the grounding lug to the optical ILA. See Mounting an Optical ILA in a Rack or Cabinet and Optical ILA Power System .

Ensure that you have the following parts and tools available (none are provided):

  • Grounding cable—The grounding cable must be 14–10 AWG (2–5.3 mm²), minimum 90° C wire, or as permitted by the local code.

  • Grounding lug for your grounding cable—The grounding lug required is a Panduit LCD6-14BH-L or equivalent.

  • Two #10-32 UNF screws

  • Screwdriver appropriate for the #10-32 UNF screws.

To connect a grounding cable to the optical ILA:

  1. Connect one end of the grounding cable to a proper site earth ground, such as the rack in which the optical ILA is mounted.
  2. Place the grounding lug attached to the grounding cable over the protective earthing terminal on the chassis (see Figure 1).
    Figure 1: Connecting a Grounding Cable to the Optical ILA
    Connecting a Grounding Cable
to the Optical ILA
  3. Secure the grounding lug to the protective earthing terminal with the washers and screws.
  4. Dress the grounding cable and ensure that it does not touch or block access to other device components and that it does not drape where people could trip over it.

Connecting AC Power to an Optical ILA

Before you begin connecting AC power to an optical ILA:

  • Read General Electrical Safety Guidelines and Warnings.

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

  • Ensure that you have connected the optical ILA chassis to earth ground.

    Caution

    Before you connect power to the optical ILA, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the switch (for example, by causing a short circuit).

    Note

    To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the chassis to earth ground before you connect it to power. For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the optical ILA chassis to connect to the earth ground (see Connecting the Optical ILA Grounding Cable).

    Note

    An AC-powered optical ILA gains additional grounding when you plug the power supply in the device into a grounded AC power outlet by using an AC power cord appropriate for your geographical location. See AC Power Cord Specifications for the Optical ILA.

Note

Each power supply must be connected to a dedicated power source outlet.

To connect AC power to an optical ILA:

  1. To prevent damage to the equipment caused by ESD, attach an ESD grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point.
  2. Ensure that the power supplies are fully inserted in the chassis and the latches are secure.
  3. Insert the coupler end of the power cord into the AC power cord inlet on the AC power supply faceplate (see Figure 2).
  4. Open the power cord retainer by pressing the protruding tab and prying it open. Wrap the power cord retainer around the AC power cord and press the cable clamp through the hole to tighten as shown in Figure 2.
    Figure 2: Connecting an AC Power Cord to an AC Power Supply in an Optical ILA
    Connecting an AC Power
Cord to an AC Power Supply in an Optical ILA
  5. If the AC power source outlet has a power switch, set it to the off (O) position.Note

    The optical ILA powers on as soon as power is provided to the power supply.

  6. Insert the power cord plug into an AC power source outlet.
  7. Repeat the steps for each power supply you are connecting to power.
  8. If the AC power source outlet has a power switch, set it to the on (|) position.
  9. Verify that the status LEDs on each power supply are lit green.

    If any of the LEDs is lit red, remove power from the power supply, and replace the power supply (see Removing a Power Supply from an Optical ILA). Do not remove the power supply until you have a replacement power supply ready: either power supplies or blank cover panels must be installed in the optical ILA to ensure proper airflow.

    Caution

    Replace a failed power supply with a blank panel or new power supply within one minute of removal to prevent chassis overheating.

Connecting DC Power to an Optical ILA

Warning

DC-powered optical ILA models are intended for installation only in a restricted access location.

Before you begin connecting DC power to the optical ILA:

  • Read General Electrical Safety Guidelines and Warnings and Optical ILA DC Power Electrical Safety Guidelines.

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

  • Ensure that you have connected the optical ILA chassis to earth ground.

    Caution

    Before you connect power to the optical ILA, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the switch (for example, by causing a short circuit).

    Note

    To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the chassis to earth ground before you connect it to power. For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the optical ILA chassis to connect to the earth ground (see Connecting the Optical ILA Grounding Cable).

  • Install the power supply in the chassis following the instructions in Installing a Power Supply in an Optical ILA.

  • Ensure that you have the following parts and tools available:

    • ESD grounding strap

    • Power cable or cables appropriate for your geographical location available to connect DC power to the optical ILA.

Note

Each power supply must be connected to a dedicated power source outlet.

To connect DC power to an optical ILA:

  1. To prevent damage to the equipment caused by static discharge, attach an ESD grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point.
  2. Ensure that the power supplies are fully inserted in the chassis and the latches are secure.
  3. Ensure that the power source is turned off, the voltage across the DC power source cable leads is 0 V, and there is no chance that the cable leads might become active during installation.
  4. Locate and remove the three-position DC connectors included in the accessory kit.
  5. Identify the ground, positive, and negative feed positions for the DC connector. See Figure 3.
  6. Strip each of the three wires coming out from the DC-input power source by 7–8 mm. Do not strip more than required, because doing so can leave the wire exposed from the DC connector after installation.
    Figure 3: Connecting the DC Power Connector
    Connecting the DC Power Connector
      1
    Positive wire
      3
    Ground wire
      2
    Negative wire
     
  7. Insert the stripped wires into the three-position DC connector.
  8. Use a ratcheting torque screwdriver to apply a torque of 4.5 lb-in. (0.5 Nm) to each of the terminal block captive screws (see Figure 3).
  9. Insert the DC connector in the optical ILA DC power supply.
  10. Tighten the attached screws (top and bottom) on the DC power connector to apply a torque of 4.5 lb-in. (0.5 Nm). See Figure 3.
  11. Repeat Step 4 through Step 10 for each power supply you are connecting to power.Warning

    Ensure that the power cables do not block access to device components or drape where people can trip on them.

  12. Close the input circuit breaker.Note

    We recommend that the 48 VDC facility DC source be equipped with a circuit protector rated at 10 A (–48 VDC) minimum, or as required by local code.

    We recommend that the 60-VDC facility DC source be equipped with a circuit protector rated at 5 A (–60 VDC) minimum, or as required by local code.

    Note

    The optical ILA powers on as soon you connect the power.

  13. Verify that the status LEDs on each power supply are lit green.

    If the DC IN OK or DC OUT OK is lit steadily red, remove power from the power supply, and replace the power supply (see Removing a Power Supply from an Optical ILA). Do not remove the power supply until you have a replacement power supply ready: the power supplies or a blank panel must be installed in the optical ILA to ensure proper airflow.

    Caution

    Replace a failed power supply with a new power supply within one minute of removal to prevent chassis overheating.