Cabling the Switch

Grounding the Switch

After mounting the switch into the rack, this section descusses how to connect the switch to the data center ground.

Figure 1 displays the location of the grounding pads located on the bottom corners of the rear panel for the models that have no management ports on the rear panel. Figure 2 displays the location of the grounding pads on the rear panel for models that have management ports on the rear panel. There are threaded holes under the sticker on the right (next to PS2) that warns about “1 min”. Figure 3 displays the location of the grounding assembly on the rear panel for DCS-7050SX3-48YC8.

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.

Figure 1. Earth Grounding Pad Sockets for Models without Management Ports on the Rear Panel

1 Earth grounding pad
Figure 2. Earth Grounding Pad Sockets for Models with Management Ports on the Rear Panel

1 Earth grounding pad
Figure 3. Earth Grounding Adapter for DCS-7050SX3-48YC8

Grounding Adapter Assembly (DCS-7050SX3-48YC8)

Use the following steps to assemble and attach a grounding assembly to the chassis before mounting it into the rack.

Figure 4 shows the exploded and assembled views.

Figure 4. Earth Grounding Adapter Assembly for DCS-7050SX3-48YC8
Note: The chassis is shown upside down in the following figure.
  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 on to 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

This section discusses the correct procedure for connecting the power cables to the device.

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-500AC
    • PWR-511-AC
    • PWR-1011-AC-RED
      Note: Handle color indicates airflow direction for all PSUs.

Figure 5 displays PWR-500AC AC power supply, including the power socket on the left side of the module. The AC power supply connects to a circuit that provides the required power, as specified by Table 4.

Figure 5. PWR-500AC AC Power Supply

1 Power supply status LED

Figure 6 displays PWR-1011-AC-RED 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 4.

Figure 6. PWR-1011-AC-RED AC Power Supply

1 Handle
2 Power supply status LED
3 Release

The power supplies require power cables that comply with IEC-320. The accessory kit provides two IEC-320 compliant power cables with appropriate connectors for the PSUs.

DC Power Supplies

The following DC power supplies are supported. Figure 7 displays PWR-500-DC DC power supply
  • PWR-500-DC
    • PWR-511-DC
    • PWR-1011-DC-RED
      Note: Handle color indicates airflow direction for all PSUs.
Figure 7. PWR-500-DC DC Power Supplies


1 Power supply status LED 3 Battery Return
2 -48V 4 Protective Earth

Figure 8 displays PWR-1011-DC DC power supply.

Figure 8. PWR-1011-DC DC Power Supplies

1 Power supply status LED 4 Battery Return 7 Terminal cover
2 -48V 5 Protective Earth    
3 Release 6 Handle    

 

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.

Connecting the DC Power Supply

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.
  3. Table 4-1 provides wiring, lug, and tightening torque information for the power supplies covered in this guide.
    Table 1. Wiring, Lug, and Tightening Torques for DC PSUs
    PSU Wire Size(1) Lug Type(2) Tightening Torque
    (AWG) (mm2) N • m in. • lbs.
    PWR-500-DC 14 or larger 2.0 or larger ring or spade/fork 1.0 9.0
    PWR-511-DC 10 - 12 6.0 - 4.0 ring 1.0 9.0
    PWR-1011-DC 6 - 8 16.0 - 10.0   2.7 24
    1. Unless otherwise noted, wire size applies to -48V, Battery return, and Protective earth wires. 2. Unless otherwise noted, twin #10 studs spaced for dual-hole lug with 5/8" hole spacing.
  4. Strip the wires to the appropriate length for the lugs to be used.
  5. Use agency-approved compression (pressure) lugs for wiring terminations.
  6. Slip on heat-shrink tubing on the wire ends before assembling the lugs on to the wire.
  7. 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.
  8. Shrink the tubing with a heat gun.

Connecting a DC Power Supply to Power Source

To connect a DC power supply to power source:

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.

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.

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.

  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 (Wire and Lug Preparation) 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.
  4. Replace the terminal covers as required.

Connecting Serial and Management Cables

This section discusses the serial and management cables requirements and connections.

The accessory kit includes the following cables:
  • RJ-45 to DB-9 serial adapter cable.
  • RJ-45 Ethernet cable.

Either the front panel or the rear panel has the console, management, and USB ports. Front Panel and Rear Panel display the front and rear panels of all switches covered by this guide.

Table 2 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
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.

Figure 9 displays the console, management, and USB ports in a representative configuration. Some earlier devices have ports where the USB port is located slightly differently.

Figure 9. Console, Management, and USB Ports

1 System status LED 3 Activity status LED 5 USB port
2 Ethernet management port 4 Serial console port 6 Link status LED

Connect the front or rear 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: 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.