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This chapter describes how to prepare your site for installation of the Catalyst 4900M switch and contains these sections:
Note A site planning checklist is provided on page 2-8 to help ensure that you complete all site planning activities before you install the switch.
Planning a proper location for the switch and layout for 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 that is placed too closely together or that is 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 40 ° C (32 to 104 ° F). 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 vents of the chassis.
Cooling air is drawn in through the right side and exhausted through the left side of the chassis. Keep the sides and rear clear of obstructions, including dust and foreign conductive material, and away from the exhaust ports of other equipment.
Appendix 1, “Specifications,” Specificationslists the operating and nonoperating environmental site requirements for the switches. To maintain normal operation and ensure high system availability, maintain an ambient temperature and EMI-free and continuous power at your site. The environmental ranges listed in 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.
This section describes the installation site power requirements for the Catalyst 4900M switch. Verify your site power before you install the switch.
This section consists of the following sections:
Follow these requirements when preparing your site for the Catalyst 4900M switch installation:
Follow these precautions when preparing your site for the Catalyst 4900M switch installation:
Warning Read the installation instructions before connecting the system to the power source. Statement 1004
Warning Installation of the equipment must comply with local and national electrical codes. Statement 1074
Warning Ultimate disposal of this product should be handled according to all national laws and regulations. Statement 1040
Follow these guidelines when setting up the site wiring. When planning the location of the new system, consider electromagnetic interface (EMI), the distance limitations for signaling, and connector compatibility.
When wires are run for any significant distance in an electromagnetic field, radio frequency interference (RFI) can occur between the field and the signals on the wires.
Note To predict and remedy strong EMI, you might need to consult RFI experts.
The power requirements might be useful for planning the power distribution system needed to support the switches. Heat dissipation is an important consideration for sizing the air-conditioning requirements for an installation. Refer to Appendix 1, “Specifications,” for the power and heat ratings for a Catalyst 4900M switch.
You will also need to provide power to the switch with the appropriate AC power cord for your location. Table 1-1 lists the specifications for the AC power cords that are available for the 1000 W AC-input power supply. The table includes references to illustrations of the AC power cords.
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NEMA 5-151 |
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BS 13632 |
1.For Japan, ask your local electrical contractor to prepare the NEMA 5-20 power plug. |
Figure 1-1 CAB-IR2073-C15-AR=, CAB-7KACR= (Argentina)
Figure 1-2 CAB-AS3112-C15-AU=, CAB-7KACA= (Australia and New Zealand)
Figure 1-3 CAB-CEE77-C15-EU=, CAB-7KACE= (Continental Europe)
Figure 1-4 CAB-C2316-C15-IT=, CAB-7KACI= (Italy)
Figure 1-5 CAB-US515-C15-US=, CAB-7KAC= (North America)
Figure 1-6 CAB-N5K6A-NA (North America)
Figure 1-7 CAB-BS546-C15-SA (South Africa, India)
Figure 1-8 CAB-9K10A-SW=, CAB-7KACSW= (Switzerland)
Figure 1-9 CAB-BS1363-C15-UK=, CAB-7KACU= (United Kingdom)
Grounding is recommended on all AC-input or DC-input installations, using only approved copper connectors. Attach the provided two hole ground lug to the chassis using M4 x 8mm bolts and then to the central office (CO) or other interior ground system with number 6 AWG wire. The grounding pad is located on the rear of the chassis, as shown in Figure 1-10.
Figure 1-10 Grounding Pad Location
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This section provides safety information that you should read and understand to ensure a safe switch installation.
Follow these guidelines to ensure your safety and protect the equipment. This list is not inclusive of all potentially hazardous situations that you may be exposed to as you install the switch, so be alert.
Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030
Warning This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available. Statement 1024
Note To completely de-energize the system, unplug the power cord.
Follow these basic guidelines when working with any electrical equipment:
Electrostatic discharge (ESD) damage occurs when electronic cards or components are improperly handled and can result in complete or intermittent failures. Follow these guidelines to prevent ESD damage:
– Any unpainted grounded surface on the chassis or equipment rack
Table 1-2 lists the site planning activities that you should perform before you install the Catalyst 4900M switch. Completing each activity helps to ensure a successful switch installation.