Chapter 4 Cabling the Switch

Chapter 4 Cabling the Switch
Chapter 4
Cabling the Switch
4.1
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.
Appendix D 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.
Quick Start Guide: 7000 Series 2RU Data Center Switches
17
Connecting Power Cables
4.1.1
Chapter 4: Cabling the Switch
AC Power Supplies
Four power supply models (in each air flow direction) are available for 7000 Series 2 RU switches. The
power supply model number is located on the module between the power socket and the fan
(Figure 4-1). Model number of available power supplies include:
• PWR-500AC
• PWR-750AC
• PWR-745AC
• PWR-1100AC
Power requirements vary by switch. Refer to Table 1-1 for information regarding your specific system.
The AC power supply connects to a circuit that provides the required power.
Figure 4-1 displays an AC power supply, including the power socket on the left side of the module.
Figure 4-1: AC Power Supply
The accessory kit provides two IEC-320 C13 to C14 power cables, each two meters long for 500W/
750W/ 1100W power supplies. Systems with 1900W power supplies come with C19 to C20 power
cables.
4.1.2
DC Power Supplies
The following two power supplies are supported.
•
PWR-1900DC
•
PWR-500DC
Figure 4-2: Supported DC power supplies
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Quick Start Guide: 7000 Series 2RU Data Center Switches
Chapter 4: Cabling the Switch
Connecting Power Cables
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.
4.1.2.1
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.
Step 1 Attach an ESD grounding strap.
Step 2 Stranded copper wiring is required.
•
Commercially available 2 to 4 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: 2 – 4 AWG (26.7 mm2 to 21.2 mm2).
•
Tightening Torque: 2.7 N-m (24 in. lbs.)
•
Primary Ground Wire Size: 2 – 4 AWG (26.7 mm2 to 21.2 mm2) per power supply.
•
The conductors are copper.
Step 3 Use agency-approved compression (pressure) lugs for wiring terminations.
Step 4 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 lugs barrel and the wire's insulator.
Quick Start Guide: 7000 Series 2RU Data Center Switches
19
Connecting Power Cables
Chapter 4: Cabling the Switch
Step 5 Shrink the tubing with a heat gun.
4.1.2.2
1900W DC Power Supply
Figure 4-3: 1900W DC power supply
To connect a DC power supply to power source:
Step 1 Prepare the stranded wiring, see Section 4.1.2.1, Wire and Lug Preparation, on page 19.
Step 2 Attach the appropriate lugs to the source DC wires.
Step 3 Use DC cables with either insulated crimp-on spade lugs or insulated crimp-on ring
connectors.
Step 4 Connect the DC-input wires:
4.1.2.3
•
Ground wire to the Protective Earth (PE
) terminal.
•
Negative source DC cable to the negative (- / -48V) terminal.
•
Positive (+) source DC cable to the positive (+ / Rtn) terminal.
PWR-500DC Power Supply
The 500W DC power supply connects to a circuit that provides -48Vto -60V and 15A. Figure 4-4
displays the DC power supply.
Figure 4-4: 500W DC Power Supply
Step 1 Prepare the stranded wiring, see Section 4.1.2.1, Wire and Lug Preparation, on page 19.
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Quick Start Guide: 7000 Series 2RU Data Center Switches
Chapter 4: Cabling the Switch
Connecting Serial and Management Cables
Figure 4-5: Prepare the Stranded Wiring
Step 2 Attach the appropriate lugs to the source DC wires.
Step 3 Use DC cables with either insulated crimp-on spade lugs or insulated crimp-on ring
connectors.
Step 4 Connect the DC-input wires to the terminal block in this order:
4.2
•
Ground wire to the Protective Earth (PE
) terminal.
•
Negative source DC cable to the negative (- / -48V) terminal.
•
Positive (+) source DC cable to the positive (+ / RTN) terminal.
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 4-1 lists the pin connections of the RJ-45 to DB-9 adapter cable.
Table 4-1 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
The front panel contains the console, management, and USB ports. Figure 4-6 displays the ports on
the DCS-7050SX-128 switch. Appendix C displays the front panel of all switches covered by this guide.
Quick Start Guide: 7000 Series 2RU Data Center Switches
21
Connecting Serial and Management Cables
Chapter 4: Cabling the Switch
Figure 4-6: Front Panel Ports
Connect the front panel ports as follows:
•
Caution
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.
Excessive bending can damage interface cables, especially optical cables.
Flexion excessive peut endommager les câbles d'interface, notamment des câbles optiques.
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Quick Start Guide: 7000 Series 2RU Data Center Switches
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