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An overtemperature condition can cause severe equipment damage or an unscheduled system shutdown. Depending on the ambient conditions, the system optimises the fan-speed for temperature and pressure and maintains the minimum fan speeds and temperatures that the chassis requires.

In the NEBS mode—the controller responds more aggressively, to maintain proper cooling for installations with high airflow impedance. When the fan tray operates in this mode, there may be increased noise levels due to increased fan speeds. To ensure high availability, the system is designed to respond to fan failures by either minimising impact or by compensating and operating at a worst case scenario specification.

If two or more fans fail, the entire fan tray operates at full speed after one minute. Further, the fan tray must be replaced.

The individual fans are not field replaceable, you must replace the fan tray. If the temperature sensor fails or communication with the temperature sensor fails, the worst case operating temperature is assumed. If the pressure sensor fails or communication with the pressure sensor fails, the worst case operating pressure is assumed. Under normal operating conditions, when none of the temperature alarms have been triggered, hardware controls fan speed. If any of the system temperature alarms are triggered, software takes fan speed control from hardware.

Refer to the System Management section of the software configuration guide for more information. When the fan tray operates at full speed, increased noise levels may be expected. The fan tray may operate at full speed in these circumstances:. The following sections provide detailed information about the available power supply modules:. Unless otherwise indicated, the power supply information provided in this document applies to all the available power supply modules.

The chassis supports field-replaceable AC-input and DC-input power supply modules. If you install modules of different types AC input and DC input and capacities, ensure that all the required conditions are met.

Has a self-cooling mechanism, with a minimum airflow of 17 cubic feet per minute CFM at percent load. Supports only single-phase source AC. Source AC can be out of phase between multiple power supplies or multiple AC power plugs on the same power supply because all the AC power supply inputs are isolated. Has a release latch and cord-retention mechanism on the front panel of the module to avoid accidental removal of the module or the attached power cord.

Supports redundant and combined configuration modes. A single nonredundant or a dual redundant power supply configuration can support the following loads:. Provides auto-identification capabilities for asset management and tracking. Has a self-cooling mechanism, with a minimum airflow of 9.

Has a release latch mechanism on the side of the module to avoid accidental removal of the module. Press for two seconds to switch it on and off. Pressing the power button on and off turns the main VDC output on and off, respectively. Standby output power of 3. The power button has two modes of operation, which are described below. Auto-on: When in this mode, the power supply module automatically starts or restarts on application or restoration of DC input power.

This is the default mode. For NEBS compliance, the power button must be in the auto-on mode. When power is restored after a power failure, the power supply module recovers automatically. Protected: When in this mode, if the DC power source output voltage is zero, or drops out for more than three seconds, you must press the power button for two seconds, to restore operation. Each input has an independent, isolated circuit.

Each DC input can be powered either from separate sources, or a suitable single source. The module has one operational mode as a function of both inputs receiving power. Has DC-input reversal protection such that the unit will survive DC-input reversal up to the full input voltage rating. A single nonredundant or a dual redundant power supply configuration, can support the following loads:. A voltage differential between inputs is acceptable, as long as the value is within the above range.

Cisco Catalyst Series Switches offer redundant and combined configuration modes for power supplies. The number of power supply modules installed and the system load determine the power level that the system expects to draw from each power supply module, and consequently, the power supply mode that will be suitable.

To calculate, or estimate a system's power budget, and to determine power supply requirements for a specific PoE configuration, use the Cisco Power Calculator. To configure a power supply mode, enter the power redundancy-mode command in global configuration mode. If you do not configure a mode, the default mode is applicable. The system operates on one to eight power supply modules. The power available to the system is the sum of power outputs of all the power supply modules in the chassis.

All available power supply modules are active, share power, and can operate at up to percent capacity. In a redundant configuration, a given power supply module can either be active, or in standby:.

An active power supply module is powered on, and provides output power. All the active modules in a chassis always attempt to share the load. A standby power supply module is powered on, but asleep, and can switch to active when required. If all the available power supply modules are active, the operational power supplies continue to share current equally.

Note that the load on the available power supplies would have increased. If standby power supply modules are available, the minimum number of power supply modules needed to power the load switch to active. N is the number of active power supply modules and can be one to seven power supply modules on a seven-slot or a ten-slot chassis, and one to three power supply modules on a four-slot chassis.

The default standby power supply slot on a seven-slot or a ten-slot chassis is eight. The default standby power supply slot on a four-slot chassis is four. To designate a different slot as standby, use the power redundancy-mode command in global configuration mode.

N number of power supply modules are configured as active, and n number of power supply modules are configured as standby. To configure standby power supply modules, use the power redundancy-mode command in global configuration mode.

For detailed software configuration information including examples, see the required version of the software configuration guide. This unit might have more than one power supply connection. All connections must be removed to de-energize the unit. While the installation of power supplies of different capacities in the same chassis is supported, it is not an optimal use of total system power in a redundant mode.

All the power supply modules that are configured as active must be of the same type; all the modules that are configured as standby must be of the same type. The type refers to AC input and DC input. All the installed AC-input power supply modules in the chassis must be of the same capacity and have the same input voltage level.

If power supply modules of different capacities are installed, the higher capacity modules must be configured as standby. Continuing with the above example, the W module is the higher capacity module and all installed CPWRDC modules are configured as standby.

This ensures that the system continues to provide redundancy at the time of a switchover. Skip to content Skip to search Skip to footer.

Book Contents Book Contents. Find Matches in This Book. PDF - Complete Book Updated: December 13, Chapter: Product Overview. Product Overview Switch Models Fan Tray Assembly Power Supply Module Switch Models The following sections provide detailed information about the available switch models: Catalyst R Switch Catalyst R Switch Catalyst R Switch Catalyst R Switch The Catalyst R Switch is a four-slot modular chassis, with two redundant supervisor module slots, two switching module slots with up to 96 front panel ports, one nonredundant fan tray assembly, and has a provision to accommodate up to four power supply modules.

Front View of the Catalyst R Switch The figure shows a front view of the chassis, with the major components identified: 1 Chassis handholds 5 Switching module slots 1,and 4 2 Power supply modules 6 Chassis Radio Frequency ID RFID 3 Fan tray assembly 7 Chassis model number 4 Supervisor module slots 2 and 3 8 System ground Rear View of the Catalyst R Switch The figure shows a rear view of the chassis, with the major components identified: 1 Access to remove fan tray from the rear 2 Blue beacon LED on the rear panel of the fan tray always matches the blue beacon on the front panel of the fan tray Table 1.

Slots are numbered 1 left to 4 right. Switching modules Accommodates two line cards. Fan tray assembly The switch supports a single front and rear serviceable and hot-swappable fan tray with 8 fans. Power supplies The chassis supports up to four field-replaceable AC-input and DC-input power supply modules. Catalyst R Switch The Catalyst R Switch is a seven-slot modular chassis, with two redundant supervisor module slots, five switching module slots with up to front panel ports, one non-redundant fan tray assembly, and a provision to accommodate up to eight power supply modules.

Front View of the Catalyst R Switch The figure shows a front view of the chassis, with the major components identified: 1 Chassis handholds 5 Supervisor module slots 3 and 4 2 Power supply modules 6 Chassis Radio Frequency ID RFID 3 Switching module slots 1,2, 5,6, and 7 7 System ground 4 Fan tray assembly 8 Chassis model number Rear View of the Catalyst R Switch The figure shows a rear view of the chassis, with the major components identified: 1 Access to remove fan tray from the rear 2 Blue beacon LED on the rear panel of the fan tray always matches the blue beacon on the front panel of the fan tray Table 2.

Catalyst R Switch The Catalyst R Switch is a ten-slot modular chassis, with two redundant supervisor module slots, eight switching module slots with up to 1-Gigabit Ethernet front panel ports, one non-redundant fan tray assembly, and a provision to accommodate up to eight power supply modules. Front View of the Catalyst R Switch The figure shows a front view of the chassis, with the major components identified: 1 Chassis handholds 5 Supervisor module slots 5 and 6 2 Power supply modules 6 Chassis Radio Frequency ID RFID 3 Switching module slots 1,2, 3, 4, 7, 8, 9 and 10 7 System ground 4 Fan tray assembly 8 Chassis model number Rear View of the Catalyst R Switch The figure shows a rear view of the chassis, with the major components identified: 1 Access to remove fan tray from the rear 2 Blue beacon LED on the rear of the fan tray always matches the blue beacon on the front of the fan tray Table 3.

Statement Warning No user-serviceable parts inside. Statement A Cisco Catalyst Series fan tray assembly— Is composed of a fan tray and an adapter that is attached to the fan tray. Can be installed and removed from the front and the rear. Is chassis-specific.

Figure 1. Slowly lift the chassis. Avoid sudden twists or moves to prevent injury. Rest the back end of the chassis on the edges of the shelf bracket rails and slide it in until the first pair of handles on both sides of the chassis are near the rack posts. Continue sliding the chassis in until the second pair of handholds are near the rack posts. Push in the the second pair of handholds and continue sliding the chassis in until the L brackets make contact with the rack posts.

Secure the chassis to the rack with either the or pan head screws from the chassis standard accessory kit. You can install cable guides with or without the shelf brackets. Follow the corresponding procedure:.

Using one screw on each side, align the cable guide mounting holes with the shelf bracket holes and the rack rail holes,. Using two screws on each side, align the cable guide mounting holes with the L bracket holes and the rack rail holes. Screws that are mounted before the cable guide is—two on each side for the shelf bracket and one on each side for the L bracket. Remaining screws that are mounted when installing the cable guide—one on each side for the shelf bracket and two on each side for the L bracket.

Screws that are mounted before the cable guide is—two on each side, securing the L bracket to the rack rails. Remaining screws that are mounted when installing the cable guide—two on each side, aligning and securing the cable guide and L bracket to the rack rails.

To mount the chassis in a NEBS-compliant mode with the air filter, use a inch rack mount. Filter brackets that are mounted on the side of the chassis hold the air filter.

A inch rack mount is used for mounting the switch in a standard 23 inch This kit is not suitable for racks with obstructions such as a power strip that could impair access to the field-replaceable units FRUs of the switch.

Take care when connecting units to the supply circuit so that wiring is not overloaded. To prevent the system from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature of:.

Place the chassis on the floor or on a sturdy table as close as possible to the rack. Leave enough clearance to allow you to move around the chassis.

Some equipment racks provide a power strip along the length of one of the rear posts. If your rack has this feature, consider the position of the strip when planning fastener points. Before installing the brackets on the chassis, determine whether to install the chassis from the front or the rear of the rack. Remove and discard the mounting ears and the ten mounting screws of the chassis.

Do not reuse them during any part of the installation process. Install the rack ear brackets on the left and right sides of the chassis. These brackets connect the chassis to the rack. The arrows on the top edge of the air filter note the direction of airflow.

Airflow direction is from right to left, when you stand facing the chassis. Insert the air filter into its housing with the arrows pointing toward the chassis. We recommend that you change the air filter every 3 months. However, examine the air filter once a month or more often in dusty environments and replace it if it appears to be excessively dirty or damaged.

Turning on the NEBS mode for the fan tray. Before performing any of the following procedures, ensure that power is removed from the DC circuit. When stranded wiring is required, use approved wiring terminations, such as closed-loop or spade-type with upturned lugs.

These terminations should be the appropriate size for the wires and should clamp both the insulation and conductor. Grounding lug—A two-hole grounding lug, which supports a 6 AWG size wire.

Supplied as part of the standard accessory kit. Grounding screws—Two M4 x 8 mm metric pan-head screws. Grounding wire—The grounding wire should be sized according to local and national installation requirements. A 6 AWG copper conductor is required for U. Commercially available 6 AWG wire is recommended. The length of the grounding wire depends on the proximity of the switch to proper grounding facilities.

Use a wire-stripping tool to remove approximately 0. Insert the stripped end of the grounding wire into the open end of the grounding lug. Crimp the grounding wire in the barrel of the grounding lug.

Verify that the ground wire is securely attached to the ground lug. Secure the grounding lug to the system ground connector with two M4 screws. Ensure that the grounding lug and the grounding wire do not interfere with other switch hardware or rack equipment.

Prepare the other end of the grounding wire, and connect it to an appropriate grounding point in your site to ensure adequate earth ground for the switch. After you install the system ground lug, follow these steps to correctly attach the electrostatic discharge ESD wrist strap that is provided with the standard accessory kit and all FRUs:.

Ensure that you are not grounded by any other means than through the wrist strap while servicing. One end of the strap terminates with the black metal strap exposed; this is wrist end; the other end terminates with a patch of copper foil; this is the equipment end.

On the wrist end of the strip, locate the length of conductive film. Wrap the adhesive side around your wrist such that it touches bare skin well.

Peel off the adhesive from the equipment end and attach it to an unpainted metal surface of the equipment you are servicing. Handle carriers using the available handles or edges only; avoid touching the printed circuit boards or connectors.

Place a removed component boardside up on an antistatic surface or in a static shielding container. If you plan to return the component to the factory, immediately place it in a static shielding container. For safety, periodically check the resistance value of the antistatic strap. The measurement should be between 1 and 10 megohm Mohm. Verify that the ejector levers of each module are fully closed parallel to the faceplate to ensure that the supervisor engine and all the switching modules are fully seated in the backplane connectors.

Check the captive installation screws of each module, and tighten any loose captive installation screws. Verify that all empty module slots and power supply bays have blanks installed properly.

The blanks optimize the air flow through the chassis and contain EMI. Blank faceplates and cover panels serve three important functions— They prevent exposure to hazardous voltages and currents inside the chassis; they contain EMI that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system until all cards, face plates, front covers, and rear covers are in place.

Turn on the power supply switches to power up the system. During the power-up sequence, the system performs a series of bootup diagnostic tests. The switch is designed to boot up in less than 30 minutes, provided that the neighboring devices are in fully operational state. In case of a problem with any of the hardware components, refer to the Troubleshooting section.

Additional system diagnostic tests are also available. These tests allow you to perform a complete sanity check on the system prior to inserting the system into your network and to monitor the health of the system while the system is running. Skip to content Skip to search Skip to footer. Book Contents Book Contents.

Find Matches in This Book. PDF - Complete Book Updated: December 13, Chapter: Installing the Switch. Statement Warning This unit is intended for installation in restricted access areas. Statement Warning This equipment must be grounded. Statement Warning This unit might have more than one power supply connection. Statement Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Statement Warning To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the handles on modules such as power supplies, fans, or cards ; these types of handles are not designed to support the weight of the unit.

Statement Warning Hazardous voltage or energy is present on the backplane when the system is operating.

Statement Warning Ultimate disposal of this product should be handled according to all national laws and regulations. Statement Warning This product requires short-circuit overcurrent protection, to be provided as part of the building installation.

Statement Warning When installing or replacing the unit, the ground connection must always be made first and disconnected last.

Statement Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Statement Warning Installation of the equipment must comply with local and national electrical codes. Statement The process of installing the switch can be broken down into a series of tasks as shown in the following figure: Note This section illustrates the installation of a Catalyst R Switch switch.

Figure 1. Installation Tasks Unpacking the Switch Check the contents of the shipping container: Procedure Step 1 Check the contents of the accessory kit. Step 2 Check the modules in each slot. Step 3 Store the shipping carton. Tip Do not discard the shipping container when you unpack the switch.

Before you begin Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety: This unit should be mounted at the bottom of the rack if it is the only unit in the rack.

Statement Cable guide installation options have been described in a separate topic. Procedure Step 1 Insert the rear of the chassis between the mounting posts of the rack. Step 2 Align the mounting holes in the L bracket on the switch with the mounting holes in the equipment rack. Figure 2. Securing the Chassis to the Rack Posts Step 3 Secure the chassis to the rack with either or pan head screws from the chassis standard accessory kit.

Figure 3. Chassis Secured to the Rack Posts Step 4 4. What to do next After installing the chassis in its location, complete the installation process by: Connecting the chassis to system ground. Installing and connecting the power supplies to the power source. Powering up the chassis and verifying the installation.

You must order it separately by using the chassis-specific part number. Fabricated metal chassis L bracket, to secure the chassis to the rack enclosure. Fabricated metal chassis L bracket, to secure the chassis to the rack enclosure 1 1 1 Shelf brackets Fabricated metal, rack shelf brackets, to support the weight of the chassis. If you are rack-mounting the switch using the Shelf accessory, these L brackets must be removed and replaced with L brackets that are part of the shelf kit Before you begin You have ordered and received the shelf kit.

Procedure Step 1 Remove and discard the L brackets and the ten mounting screws that the chassis is shipped with. Figure 4. Step 3 Using the M4 x 8 mm Phillips flat head screws in the shelf kit, secure the L brackets to the front-left and front-right sides of the chassis four on each side. Figure 7. Installing the Shelf Brackets Install the shelf brackets before you install the chassis in the rack. You have to front-mount the shelf brackets. Before you begin Determine the clearance between the insides of the left and right rails of your rack system and install the shelf brackets accordingly.

Step 2 Position the support flange of the right shelf bracket on the front of the right rail — make sure that it is level with the left shelf bracket. Use the same type of screws for the left and right shelf bracket. Figure 8. Installing the Shelf Brackets 1 Shelf brackets 2 Pan head screws from the shelf kit that secure the shelf brackets to the rack posts The shelf brackets are now securely mounted to the rack posts What to do next Rack-mount the chassis.

Two people will be required for this task. Rack-Mounting the Chassis This procedure shows how to rack mount the chassis with shelf brackets. Warning Two people are required to lift the chassis. To prevent injury, keep your back straight and lift with your legs, not your back. Statement Tip We recommend that you have a third person to assist in this procedure. To install the switch chassis in the equipment rack, perform these steps: Before you begin Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable.

Statement Install the shelf kit L brackets on the chassis and the shelf brackets on the rack posts. Procedure Step 1 Pull out all four of the handholds Figure 9. Chassis handholds 1 All four of the chassis handholds pulled out and the back end of the chassis resting on the edges of the shelf bracket rails. Step 3 Rest the back end of the chassis on the edges of the shelf bracket rails and slide it in until the first pair of handles on both sides of the chassis are near the rack posts.

Step 4 Push in the handholds that are closest to the rack posts Figure Sliding the Chassis in - Part 1 1 Handholds closest to the rack posts, pushed in. Sliding the Chassis in - Part 2 1 Chassis is slid in until the second pair of handholds are near the rack posts.

Step 7 Secure the chassis to the rack with either the or pan head screws from the chassis standard accessory kit. Figure Securing the Chassis to the Rack Posts Figure Chassis Secured to the Rack Posts What to do next After installing the chassis in its location, complete the installation process by: Connecting the chassis to system ground.

Installing the Cable Guide You can install cable guides with or without the shelf brackets. Follow the corresponding procedure: Note Cable guides are part of the standard accessory kit. Step 3 Position the cable guides and align with the L brackets and shelf brackets. Using one screw on each side, align the cable guide mounting holes with the shelf bracket holes and the rack rail holes, Using two screws on each side, align the cable guide mounting holes with the L bracket holes and the rack rail holes.

Cable guide installation with shelf brackets is complete. Step 2 Position the cable guides and align with the L brackets. Cable guide installation without shelf brackets is complete. Table 2. Statement Warning Take care when connecting units to the supply circuit so that wiring is not overloaded. Statement Before you begin Prepare for the installation as follows: Place the chassis on the floor or on a sturdy table as close as possible to the rack. Open the rack-mount kit and verify that all parts are included.

Note Some equipment racks provide a power strip along the length of one of the rear posts.



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