Cabling the Switch

This section discusses the following topics:

Grounding the Switch

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

Figure 1 - Earth Grounding Pad Sockets for Models without Management Ports on the Rear Panel display the grounding pads on the rear panel's bottom corners for the models with no management ports on the rear panel.

Figure 2 - Earth Grounding Pad Sockets for Models with Management Ports on the Rear Panel display the location of the grounding pads on the rear panel for models with management ports on the rear panel. There are threaded holes under the sticker on the right (next to PS2) that warn about “1 min”.

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

Note: NEBS-compliant deployments require chassis grounding. Use the grounding point(s) on the switch directly or with the appropriate ground adapter kit to ground the chassis. Grounding on the hot-swappable power supplies cannot ensure continuous grounding to the chassis when a power supply is removed.

Figure 4 - Earth Grounding Adapter Assembly for DCS-7050SX3-48YC8 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.

 

 

The following switches support external chassis grounding. Identify the location for attaching the adapter or the lug. As shown in the example, the attachment point is on the bottom of the chassis for the switches that support the KIT-GND-EXT-1RU grounding kit.

Table 1. Grounding Kit Adapter Support (1RU)
Switch Grounding Kit Adapter
DCS-7050QX-32S Attach ground directly to back
DCS-7050TX-64 Attach ground directly to back
DCS-7050SX-72  
DCS-7050TX-96  
DCS-7050CX3-32S Attach ground directly to back
DCS-7050CX3M-32S Attach ground directly to back
DCS-7050SX3-24YC4C-S KIT-GND-EXT-1RU
DCS-7050TX-48 Attach ground directly to back
DCS-7050SX-64 Attach ground directly to back
DCS-7050TX-72Q Attach ground directly to back
DCS-7050SX2-72Q Attach ground directly to back
DCS-7050SX3-48YC12 Attach ground directly to back
DCS-7050TX3-48C8 KIT-GND-EXT-1RU
DCS-7050SX3-48YC8C KIT-GND-EXT-1RU
DCS-7050QX2-32S Attach ground directly to back
DCS-7050TX-72 Attach ground directly to back
DCS-7050SX-72Q  
DCS-7050SX-96  
DCS-7050SX3-48YC8 KIT-GND-EXT-1RU
DCS-7050SX3-48C8 KIT-GND-EXT-1RU
  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

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. Consult with the appropriate regulatory agencies and inspection authorities to ensure compliance if necessary.

 

L'installation de cet équipement doit être conforme aux codes électriques locaux et nationaux. Consultez les agences de réglementation et les autorités d'inspection appropriées pour garantir la conformité si nécessaire.

 

The switch operates with two installed power supplies. At least one power supply must connect to a power source. Two circuits provide redundancy protection. The 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: The handle color indicates the airflow direction for all PSUs.

     

     

The Figure 5 - PWR-500AC AC Power Supply displays the PWR-500AC AC power supply, including the power socket on the left side of the module. The AC power supply connects to a circuit providing the required power, as Table 4 - Switch Specifications (Power Draw) specified.

 

Figure 5. PWR-500AC AC Power Supply

1 Power supply status LED

 

The Figure 6 - PWR-1011-AC-RED AC Power Supply displays the 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 providing the required power, as Table 4 - Switch Specifications (Power Draw) specified.

 

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 - PWR-500-DC DC Power Supplies displays PWR-500-DC DC power supply
  • PWR-500-DC
  • PWR-511-DC
  • PWR-1011-DC-RED

     

     

    Note: The handle color indicates the 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

 

The Figure 8 - PWR-1011-DC DC Power Supplies displays the 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 during installation and remove last when removing power.

 

Appliquez une connexion à la terre au commutateur pendant l'installation et retirez-la en dernier lors de la mise hors tension.

 

Connecting the DC Power Supply

Wire and Lug Preparation

Before installing, remove power 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 2 - Wiring, Lug, and Tightening Torques for DC PSUs provide wiring, lug, and tightening torque information for the power supplies covered in this guide.

     

    Table 2. 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/forkring 1.0 9.0
    PWR-511-DC 10 - 12 6.0 - 4.0 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 onto 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 a Power Source

To connect a DC power supply to a 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 it last when removing power.

 

Appliquez d'abord la connexion à la terre lors de l'installation et retirez-la en dernier lors de la mise hors tension.

 

 

  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.
    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: Remove terminal covers as needed.

     

     

  4. Replace the terminal covers as required.

Connecting Serial and Management Cables

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

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

     

The front or rear panels have the console, management, and USB ports.

Table 3 - RJ-45 to DB-9 Connections lists the pin connections of the RJ-45 to DB-9 adapter cable.

 

Table 3. 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 - Console, Management, and USB Ports display the console, management, and USB ports in a representative configuration. Some earlier devices had ports where the USB port was 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.