Cabling the Switch

The following topics are covered in this section:

Grounding the Switch

After mounting the switch into the rack, connect the switch to the data center ground. Figure 1 displays the location of the grounding pads located on the rear panel of the switches.

 

Important:

Grounding wires and grounding lugs (M4 x 0.7) are not supplied. Wire size should meet local and national installation requirements. Commercially available 12 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.

 

Figure 1. Earth Grounding Pad Sockets

1 Power Supply Module 1 4 Fan Module 2 7 Fan Module 5
2 Management Ports 5 Fan Module 3 8 Ground
3 Fan Module 1 6 Fan Module 4 9 Power Supply Module 2

Connecting Power Cables

Important:

Installation of this equipment must comply with local and national electrical codes. If necessary, consult with the appropriate regulatory agencies and inspection authorities to ensure compliance.

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.

 

The switch operates with two installed power supplies. At least one power supply must connect to a power source. Two circuits provide redundancy protection. Rear Panel displays the location of the power supplies on the rear panel of the switch.

 

Important:

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.

 

  • Non-Redundant Configuration: Connect power to either of the two power supplies.
  • Redundant Power Supply Configuration: Connect power to both power supplies.
  • Power down the Switch: Remove all power cords and wires from the power supplies.
    Important:

    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.

     

    Important:

    This unit requires overcurrent protection.

    Cet appareil requiert une protection contre les surintensités.

     

AC Power Supplies

The following AC power supplies are supported.

  • PWR-1600AC

Figure 2 displays an AC power supply, including the power socket on the right side of the module. The AC power supply connects to a circuit that provides the required power, as specified by Table 1.

Figure 2. AC Power Supply

1 Handle 3 Release
2 Status LED    

The power supplies require power cables that comply with IEC-320. The accessory kit provides two IEC-320 C13 to C14 power cables.

DC Power Supplies

The following DC power supplies are supported.

  • PWR-1611-DC
Figure 3. Supported DC power supplies

1 Status LED 3 Handle
2 Release    
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.

 

Important:

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.

 

Important:

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.

 

Important:

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

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.
  1. Stranded copper wiring is required.
    • Commercially available 4 to 6 AWG wire is recommended for installations in the U.S.
      • Wire size should meet local and national installation requirements.
        • Grounding wires and grounding lugs are not supplied.
        • Strip the wires to the appropriate length for the lugs.

    The wires connecting the DC power supply to the power source must meet the following requirements:

    • DC Input Wire Size: 4 – 6 AWG (21.2 mm2 to 13.3 mm2).
    • Primary Ground Wire Size: 4 – 6 AWG (21.2 mm2 to 13.3 mm2) per power supply.
    • The conductors are copper.
      Figure 4. Lugs Wiring Terminations

       
      1 Insulated wire 3 Lug 5 1/2”
      2 Heat-shrink tubing 4 1/4” 6 5/8”

       

  2. Use agency-approved compression (pressure) lugs for wiring terminations with a single 5/16" mounting hole. Two-hole lugs should have 1/4" mounting holes on 5/8" centers.
  3. Slip on heat-shrink tubing on the wire ends before assembling the lugs on to the wire.
    • The lugs must be crimped with the proper tool.
    • The tubing should extend over the lug’s barrel and the wire's insulator.
  4. Shrink the tubing with a heat gun.

Connecting the PWR-1611-DC Power Supply

The PWR-1611-DC power supply connects to a circuit that provides -48 V to -60 V and 39 A. Ensure the wires connecting the DC power supply to the power source meet the following:
  • DC Input Wire Size: AWG 6 (13.3 mm2) or larger as appropriate.
  • Safety Ground Wire Size: AWG 6 (13.3 mm2) or larger as appropriate.
  • Wire Terminal (Lug): 2-hole lug, 6-8 AWG, #8 (4 mm) screw.
  • Over-current protection: 40 A.
    Important:

    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.

    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.

 

Figure 5 displays the exploded and assembled views of the DC power supply with the connection adapter. The adapter is connected to the power supply using two captive fasteners as shown.

Figure 5. Connecting Cables to PWR-1611-DC PSU



1 -48 V 4 Release lever 7 Protective earth
2 Battery return 5 Captive screws    
3 Terminal cover 6 Lug locking nuts    

To connect a DC power supply to power source:

  1. Remove the connection adapter (if attached to the PSU) by turning the two captive fasteners and pulling off the adapter.
  2. Remove the terminal cover to expose the connectors on the adapter.
  3. Attach the appropriate lugs to the source DC wires.
  4. Use DC cables with either insulated crimp-on spade lugs or insulated crimp-on ring connectors.
    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.

     
  5. Connect the DC-input wires to the adapter in this order:
    1. Protective Earth cable to the Protective Earth terminal on the right side of the adapter.
    2. -48V source DC cable to the negative -48V terminal on the left side of the adapter.
    3. Battery Return source DC cable to the Battery Return terminal on the left side of the adapter.
    4. Torque the screws to 2.7 N·m / 24.0 in·lbs.
      Important:

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

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

       

    5. Replace the terminal cover.
  6. Connect the adapter to the power supply and fasten the two captive screws.

Connecting Serial and Management Cables

The accessory kit includes the following cables:

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

Table 1 lists the pin connections of the RJ-45 to DB-9 adapter cable.

Table 1. 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
Note: RJ-45 to DB-9 connections: For models with a console management port on the rear panel, RJ-45 pin 1 (RTS) is connected to RJ-45 pin 8 (CTS); RJ-45 pin 2 (DTR) and RJ-45 pin 7 (DSR) are not electrically connected to any signal.

 

The front panel contains the status LEDs. Figure 6 displays the front panel of the DCS-7280CR2K-30 switch. Figure 7 displays the management ports on the rear panel of the DCS-7280CR2K-30 switch. Front Panel and Rear Panel display the front and rear panels of all switches covered by this guide.

Figure 6. Front Panel LEDs

1 System status LED 3 Power supply 1 status LED
2 Fan tray status LED 4 Power supply 2 status LED

 

Figure 7. Management Ports

1 Console serial port 4 Link status LED
2 USB port 5 Activity status LED
3 Ethernet management port 6 System status LED

 

Connect the management 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: The USB port may be used for software or configuration updates.

     

    CAUTION:

    Excessive bending can damage interface cables, especially optical cables.

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