Cabling the Switch

The Cabling the Switch section includes the following topics:

Grounding the Switch

This section describes the importance of grounding the device to the data center ground.

Normally, the functional grounding of the switch is achieved through the input connection. If you would like to do additional grounding, proceed to the following instructions:

Figure 1. Grounding the Switch

1

Screw M4 (with washer)

2

Solder terminal lug

3

Grounding point
Note: Grounding wires and grounding lugs are not supplied with the product. The wire size should meet local and national installation requirements.
CAUTION: The grounding connection must only be removed if all supply connections are disconnected.
  1. Ensure the rack is properly grounded and complies with ETSI ETS 300 253.
  2. Verify a good electrical connection to the grounding point on the rack (no paint or isolating surface treatment).
  3. Attach the solder terminal lug to an 18 AWG minimum grounding wire and connect it to the grounding point on the rear panel of the switch.
  4. Tighten the M4 screw to secure the lug to the grounding point.
  5. Connect the other end of the wire to the nearby grounded surface.

Grounding Lug Preparation

The following procedure connects the chassis to the data center ground:

  1. Prepare the (stranded) copper wiring for the ground wire.
  2. Use agency-approved compression (pressure) lugs for wiring terminations.
  3. Slip on heat-shrink tubing on the wire end before assembling the lugs on to the wire.
  4. Crimp the lugs with the proper tool, and ensure that the tubing extends over the barrel of the lug and the insulation on the wire as shown in the following figure.
    Figure 2. Lug Preparation

    1

    Insulated wire

    2

    Heat-shrink tubing

    3

    Lug (all three terminals)

    A

    ¼"

    B

    ½"

    C

    ⅝"
  5. Shrink the tubing with a heat gun.

Connecting Power Cables

This section describes the installation requirements for connecting the power cables to the device.

Important:

  • Installation of this equipment must comply with local and national electrical codes. Consult with the appropriate regulatory agencies and inspection authorities to assure compliance if necessary.

    Installation de cet équipement doit être conformes aux codes électriques locaux et nationaux. Si nécessaire, consulter les organismes de réglementation appropriés et des autorités de contrôle pour assurer la conformité.

  • Read all installation instructions before connecting the system to the power source.

    Lire toutes les instructions d'installation avant de brancher le système à la source d'alimentation.

  • This equipment must be grounded. Never defeat the ground conductor.

    Cet équipement doit être mis à la terre. Ne jamais modifier le conducteur de terre.

  • This unit requires overcurrent protection.

    Cet appareil requiert une protection contre les surintensités.

Connecting AC Power

This section describes how to connect the AC power supply to the device.

The AC power supplies are internal to each switch.

Power requirements vary by switch. Refer to the Specifications section for information regarding your specific device.

Rear Panel section displays the location of the power supplies for a specific device.

Power Configurations

  • Non-redundant: Connect power to either of the two power supplies.
  • Redundant: Connect each AC power supply to a circuit that provides the required power.
Note:

Remove all power cords and wires from the power supplies to power down the switch. Input power and power supply redundancy is dependent on the actual system power draw.

Each power supply should be connected to its own input overcurrent protection for maximum input power redundancy.

Use power supply cables that comply with IEC-320 and have a C13 plug.

Connecting DC Power

This section describes how to connect the DC power supply to the device.

The DC power supplies areinternal to each switch.

Power requirements vary by switch. Refer to the Specifications section for information regarding your specific device.

Rear Panel section displays the location of the power supplies for the specific device. There is a cover over the DC supply terminals.

Important:

  • A disconnect device must be provided as part of the installation.

    Un dispositif de sectionnement doit être fourni dans le cadre de l'installation.

  • Ensure power is removed from DC circuits before performing any installation actions. Locate the disconnect device, circuit breakers, or fuses on DC power lines servicing the circuits. Turn off the power line circuits or remove the fuses.

    Pouvoir assurer qu'il est retiré de circuits DC avant d'effectuer des actions d'installation . Localiser les disjoncteurs ou des fusibles sur les lignes de courant continu desservant les circuits. Coupez les circuits de lignes d'alimentation ou retirer les fusibles.

  • Wire size must comply with local and national requirements and electrical codes. Use only copper wire.

    Le calibre du fil doit être conforme aux exigences locales et nationales et les codes électriques. Utiliser du fil de cuivre.

  • Apply the grounding connection prior to installation and remove it after disconnecting the power.

    Appliquer connexion à la terre à l'interrupteur premier lors de l'installation et de supprimer la dernière alimentation lors du débranchement.

Power Configurations

  • Non-redundant: Connect power to either of the two power supplies.
  • Redundant: Connect each DC power supply to a circuit that provides the required power.

Connecting DC Power Supply to Power Source

This section describes connecting the DC power supply to the power source.

Important:

  • Wire size must comply with local and national requirements and electrical codes. Use only copper wire.

    Calibre doit respecter les exigences locales et nationales et les codes de l’électricité. Utiliser seulement du fil de cuivre.

  • Apply the ground connection prior to installation and remove it after disconnecting the power.

    Appliquer le motif connexion tout d’abord pendant l’installation et supprimer dernière lors du retrait de puissance.

To connect a DC power supply to the power source, follow the steps below:

  1. Remove the terminal cover to expose the connectors on the terminal block on the face.
  2. Attach the appropriate lugs to the source DC wires.

    Use DC cables with insulated crimp-on spade lugs or crimp-on ring connectors.

  3. Connect the DC-input wires to the terminal block in this order:
    1. Ground cable to the ground connector on the terminal block.
    2. Negative (–) source DC cable to the negative (–) connector on the terminal block.
    3. Positive (+) source DC cable to the positive (+) connector on the terminal block.
    4. Torque the screws as specified in the following table.
      Table 1. Wiring, Lug, and Tightening Torques for DC PSUs
      Wire Size Lug Type Tightening Torque
      AWG mm2 N.m lbs
      14 to 18 1.5 to 0.75 ring 0.8 7.0
  4. Replace the terminal cover.

Connecting Serial and Management Cables

This section describes the type of cables required to connect the device.

The accessory kit includes the following cables:

  • RJ-45 to DB-9 serial adapter cable
  • RJ-45 Ethernet cable

The following RJ-45 to DB-9 table lists the pin connections of the RJ-45 to DB-9 adapter cable.

Table 2. RJ-45 to DB-9 Connections
RJ-45 DB-9 RJ-45 DB-9
RTS 1 8 CTS GND 5 5 GND
DTR 2 6 DSR RXD 6 3 TXD
TXD 3 2 RXD DSR 7 4 DTR
GND 4 5 GND CTS 8 7 RTS
Figure 3. Front Panel Ports

1

Ethernet Management Port

2

USB Port

3

Console Serial Port

Connect the front panel ports as described below:

  • Console (Serial) Port: Connect to a computer with the RJ-45 to DB-9 serial adapter cable. The switch uses the following default settings:

    • 9600 baud
    • No flow control
    • 1 stop bit
    • No parity bits
    • 8 data bits
  • Ethernet Management Port: Connect to 10/100/1000 management network with RJ-45 Ethernet cable.
  • USB Port: The USB port may be used for software or configuration updates.
    Important:

    Excessive bending can damage interface cables, especially optical cables.

    Flexion excessive peut endommager les câbles d'interface, notamment des câbles optiques.