Cabling the Switch

This section discusses the following topics:

Grounding the Switch

After mounting the switch into the rack, connect the switch to the data center ground.

 

Important:

Grounding wires and grounding lugs (M4 x 0.7) are not supplied. Wire size should meet local and national installation requirements. Commercially available 6 AWG wire is recommended for installations in the U.S.

 

À la terre et de mise à la terre fils cosses (M4 x 0.7) ne sont pas fournis. Calibre des fils doit satisfaire des exigences de l’installation locale et nationale. Disponible dans le commerce 6 fils AWG est recommandé pour les installations aux États-Unis.

 

Models without Grounding Pads

For models that do not have grounding pads, use an adapter as shown for the DCS-7050SX3-96YC8 (Figure 1 - Earth Grounding Adapter for Models such as DCS-7050SX3-96YC8). Assemble an adapter to attach to the chassis (Grounding Adapter Assembly). Once the grounding lug is attached to the adapter, attach it to the chassis.

 

Note: A representative 1 RU chassis is used for the illustrations to highlight the grounding adapter assembly and attachment.

 

 

Figure 1. Earth Grounding Adapter for Models such as DCS-7050SX3-96YC8

 

Ground Adapter Assembly

Use the following steps to assemble and attach a grounding assembly to the chassis before mounting it into the rack for models that require the grounding adapter. Figure 2 - Earth Grounding Adapter Assembly for Models such as DCS-7050SX3-96YC8 shows the exploded and assembled views.

 

Note: The chassis is shown upside down in the following figure.

 

 

Figure 2. Earth Grounding Adapter Assembly for Models such as DCS-7050SX3-96YC8

 

  1. Identify all the components to be assembled:
    • 1x Grounding adapter
    • 1x Grounding bracket
      • 2x Flat-head screws (Phillips,M4 x 5.00 long, stainless steel)
      • 2x Hex nuts (#10-32, Serrated Flange, stainless steel)
      • 1x Grounding lug (Copper, 2-hole, 6 AWG, straight barrel)

         

  2. Insert the grounding adapter through the holes in the grounding bracket.
  3. Insert the ground lug onto the grounding adapter studs and fasten using the hex nuts to form the grounding assembly.
  4. With the chassis on its top on a flat surface, attach the grounding assembly to the chassis using the flat head screws.
  5. Turn the chassis over before mounting it into a rack and connecting cables.

Connecting Power Cables

The following are directions for connecting the power cables.

 

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.

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

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

This unit requires overcurrent protection.

 

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.

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

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

Cet appareil requiert une protection contre les surintensités.

 

The following AC power supply is supported. Up to four power supplies can power the switch.

PWR-1021-AC-RED

Power requirements vary by switch. Refer to Table 4 - Switch Specifications (Power Draw) for information regarding your specific system. Connect each AC power supply to a circuit that provides the required power.

The Rear Panel displays the location of the power supplies on the switch's rear panel.

 

Note:

Remove all power cords and wires from the power supplies to turn off the switch.

Input power and power supply redundancy depend on the actual system power draw.

Connect each power supply to its input overcurrent protection for maximum Input Power redundancy.

 

For power supply redundancy, at least one more power supply should be installed than is required to power the system. The Switch Specifications (Power Draw) display the AC power supply.

 

Figure 3. AC Power Supply

1

PSU handle

 2 PSU status LED 3 Release

 

The accessory kit provides IEC-320 C15 to C16 power cables.

DC Power Supplies

The following DC power supplies are supported.

PWR-521-DC-RED

Figure 4. DC Power Supply (PWR-521-DC-RED)

 

Note:

A disconnect device must be provided as part of the 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.

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

Apply ground connection to the switch first during installation and remove last when removing power.

 

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

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.

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

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

Wire and Lug Preparation

Before performing any installation actions, ensure power is removed from DC circuits by turning off the power line servicing the circuits. Prepare the stranded wiring before you begin a DC power installation.

Note: Stranded copper wiring is required and should meet local and national installation requirements. Wires and grounding lugs are not supplied.

 

  1. Attach an ESD grounding strap.
  2. Prepare the stranded copper wiring for the power supply to be used. Table 1 - Wiring, Lug, and Tightening Torques for DC PSU provides wiring, lug, and tightening torque information for the power supplies covered in this guide.
    Table 1. Wiring, Lug, and Tightening Torques for DC PSU
    PSU Wire Size(1) Lug Type(1) Tightening Torque
    (AWG) (mm2) N∙m in∙lbs.
    PWR-500-DC-RED 12 - 14 4.0 - 2.5 Twin #10 studs spaced for dual-hole lug with 5/8" hole spacing. 1.0 9

    1. Unless otherwise noted, applies to -48V, Battery return, and Protective earth wires.

  3. Strip the wires to the appropriate length for the lugs to be used.
  4. Use agency-approved compression (pressure) lugs for wiring terminations.
  5. Slip on heat-shrink tubing on the wire ends before assembling the lugs on to the wire.
  6. Crimp the lugs with the proper tool, and ensure that the tubing extends over the barrel of the lugs and the insulation on the wires (Figure 5 - Lugs Wiring Terminations).
    Figure 5. Lugs Wiring Terminations

    1 Insulated wire 3 Lug (all three terminals) B 1/2"
    2 Heat-shrink tubing A 1/4" C 5/8"

     

  7. Shrink the tubing with a heat gun.

Connecting a DC Power Supply to Power Source

To connect a DC power supply to power source:

  1. Prepare the stranded wiring (Wire and Lug Preparation).
  2. Attach the appropriate lugs to the source DC wires.
  3. Connect the DC-input wires to the appropriate terminals using the specified torque (Table 1 - Wiring, Lug, and Tightening Torques for DC PSU) in the following order.
    Note: Remove terminal covers as needed.

     

    1. Ground wire to the Protective Earth (PE) terminal.
    2. Negative source DC cable to the negative (- / -48V) terminal.
    3. Positive (+) source DC cable to the positive (+ / Rtn) terminal.
    Note:

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

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

    Apply the ground connection first during installation and remove last when removing power.

     

    Assurez-vous de pouvoir retirer des circuits en courant continu avant d’effectuer toute action d’installation.Localiser les disjoncteurs ou fusibles sur les lignes électriques DC entretien des circuits. Mettez hors tension le circuit ligne ou retirer les fusibles.

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

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

     

  4. Replace the terminal covers as required.

Connecting Serial and Management Cables

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 Connections 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 6. Front Panel Ports

1

Ethernet management port

 2 USB port 3 Console serial port

 

Connect the front panel ports as follows:

  • Console (Serial) Port: Connect to a PC 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: Use the USB port 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.