Feedback
Table Of Contents
Site Power Requirements and Heat Dissipation
System Ground Connection Guidelines
AC Power Connection Guidelines
Preparing for Installation
Warning
This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security. Statement 1017
Warning
Warning
This chapter describes how to prepare your site for the installation of the switch and contains these sections:
•
•
•
Note
Electrostatic Discharge
Electrostatic discharge is common on Category 5E and Category 6 cabling systems.
Category 5E and Category 6 cables have higher capacitance than Category 5 cables. As a result, Category 5E and Category 6 cables can store higher voltages than Category 5 cables and are more prone to cause damage to networking equipment should a differential discharge event occur.
Unshielded twisted-pair cables can store high voltages. When these charged cables are connected to networking equipment, the energy is discharged into the networking equipment; this is known as electrostatic discharge (ESD). Networking equipment is commonly designed and tested to withstand common mode ESD events of up to 2000 V. The design for the common mode event is based on the expectation that the discharge is delivered to all pins of a port at once. Sometimes voltage is discharged to some of the pins of the connector and not others, or to some pins on the connector before others. This is known as a differential discharge event, which can damage the networking equipment being connected.
Following are preventive measures against ESD cable damage:
•
–
–
–
•
•
Site Power Requirements and Heat Dissipation
Note
This section provides site power requirements and heat dissipation specifications for the Catalyst 4000 series switches. You should verify site power before you install the switch.
Knowing the power requirements is useful for planning the power distribution system necessary to support the switches. The heat dissipation specifications are an important consideration when estimating the air-conditioning requirements for an installation. Table 2-1 provides the power requirement and heat dissipation specifications for the Catalyst 4003 and 4006 switches, supervisor engines, and switching modules.
System Ground Connection Guidelines
A grounding pad with two system (earth) grounding holes is provided in an enclosure on the right front panel of the Catalyst 4003 switch and near the power supplies on the Catalyst 4006 switch. See Figure 2-1 for the location of the grounding holes on the Catalyst 4003 switch and Figure 2-2 for the location on the Catalyst 4006 switch.
Figure 2-1 Catalyst 4003 Grounding Holes
Figure 2-2 Catalyst 4006 Grounding Holes
Parts and Required Tools
Note
To make an adequate grounding connection, you will need the following parts and tools:
•
•
•
•
•
•
Connecting System Ground
This section describes how to connect the Catalyst 4003 and Catalyst 4006 switches to earth ground. You must complete this procedure before connecting system power or turning on your switch.
Follow these steps to attach the grounding lug and cable to the grounding pad on the Catalyst 4003 and Catalyst 4006 switches:
Step 1
Step 2
Step 3
Step 4
See Figure 2-3 for the location of the grounding pad on the Catalyst 4003 switch and Figure 2-4 for the Catalyst 4006 switch.
Figure 2-3 Connecting System Ground on the Catalyst 4003 Switch
Figure 2-4 Connecting System Ground on the Catalyst 4006 Switch
Step 5
Step 6
Ensure that the grounding lug and the attached wire will not interfere with other switch hardware or rack equipment.
Step 7
Step 8
AC Power Connection Guidelines
This section provides guidelines for connecting Catalyst 4000 series AC power supplies to the site power source.
For a list of the nominal and acceptable voltage ranges for source AC power, see Appendix A, "Specifications."
Figure 2-5 shows the different styles of AC-input power plugs that are available for various international locales.
Table 2-2 lists the AC-input power cord options and Cisco product numbers. Make sure that you have the correct power cord for your site.
Figure 2-5 AC Power Cord Plugs
Ventilation
Planning a proper location for the switch and the layout of your equipment rack or wiring closet is essential for successful system operation. You should install the switch in an enclosed, secure area, ensuring that only qualified personnel have access to the switch and control of the environment. Equipment placed too close together or inadequately ventilated can cause system overtemperature conditions. In addition, poor equipment placement can make chassis panels inaccessible and difficult to maintain.
The switch operates as a standalone system mounted in a rack in a secure wiring closet. It requires a dry, clean, well-ventilated, and air-conditioned environment. To ensure normal operation, maintain ambient airflow. If the airflow is blocked or restricted, or if the intake air is too warm, an overtemperature condition can occur. The switch environmental monitor can then shut down the system to protect the system components.
To ensure normal operation and avoid unnecessary maintenance, plan your site configuration and prepare your site before installation. After installation, make sure that the site maintains an ambient temperature of 0 to 40ºC (32 to 104ºF). It is essential to keep the area around the chassis as free from dust and foreign conductive material (such as metal flakes from nearby construction activity) as is possible.
Multiple switches can be rack-mounted with little or no clearance above and below the chassis. However, when mounting a switch in a rack with other equipment, or when placing it on the floor near other equipment, ensure that the exhaust from other equipment does not blow into the intake vent of the chassis.
Cooling air is drawn in through the right side of the chassis. Keep the right side clear of obstructions, including dust and foreign conductive material, and away from the exhaust ports of other equipment.
Appendix A, "Specifications," lists the operating and nonoperating environmental site requirements for the switches. To maintain normal operation and ensure high system availability, maintain an ambient temperature and clean power at your site. The environmental ranges listed in Appendix A, "Specifications," are those within which the switch will continue to operate; however, a measurement that approaches the minimum or maximum of a range indicates a potential problem. You can maintain normal operation by anticipating and correcting environmental anomalies before they exceed the maximum operating range.
Site-Planning Checklist
Table 2-3 lists the site-planning activities that you should complete before you install a Catalyst 4000 series switch. Completing each activity helps to ensure a successful switch installation.
