This appendix describes the power supplies supported by the Catalyst E-series switches. The appendix contains the following sections:. The source AC can be out of phase between multiple power supplies or multiple AC-power plugs on the same power supply because all AC power supply inputs are isolated.
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Each chassis power supply should have its own dedicated branch circuit: 15 A or 20 A for North America and circuits sized to local and national codes for International locations.
Table A-1 lists the specifications for the W AC-input power supply. Autoranging input with power factor correction PFC. Note Power factor correction is a standard feature on all Catalyst E-series AC-input power supplies. PFC reduces the reactive component in the source AC current allowing higher power factors typically 99 percent or better and lower harmonic current components.
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Each chassis power supply should have its own dedicated, fused-branch circuit:. Not supported 1. Switching modules in the other slots will not be able to provide PoE. Table A-3 lists the specifications for the regional AC power cords that are available for the W AC-input power supply. Table A-4 lists the specifications for the W AC-input power supply. Supported, up to W Cisco phones in combined mode. Systems with dual power supplies must have a minimum configuration of one fan tray assembly, one supervisor engine, and one additional module.
Failure to meet these minimum configuration requirements can cause a false power supply output fail signal.
The table includes a power plug illustration for each power cord. Table A-7 lists the specifications for the W AC-input power supply. Not supported 3. Switching modules in other slots will not be able to provide PoE.
Table A lists the specifications for the W DC-input power supply. The input power is configurable in the CLI.
The Cisco IOS command is power dc input. Configure the switch software to match the requirements of your switch. Accepts 10 to 12 AWG size copper wire. The actual size of the wire needed is determined by the installer or the local electrician. Table A lists the chassis specific power usage numbers for the W DC-input power supply. Table A lists the specifications for the W triple input DC-input power supply. Maximum kVA rating 4. Current draw at — The kVA rating listed for the power supply should be used as the sizing criteria for both UPS outputs as well as standard circuits and transformers to power a switch.
Table A lists the W triple-input DC-input power supply input modes and outputs. Power output also depends on whether two supplies are used, and whether they are in redundant or combined mode. Table A provides a matrix of possible outputs in combined mode depending on the power provided to the supply.
The W triple-input DC-input power supply data only allows added redundancy by providing terminals for two DC inputs rated at 15 A and one rated at This power supply has five operational modes depending on the inputs receiving power.
When all three inputs are active, at input voltages greater than — Table A provides output information for these modes, given a single supply. The maximum total input current is To determine the total maximum input power to a supply, add up the active individual module input power ratings.
Table A provides output information for these modes, given two supplies working in combined mode. Table A provides output information for these modes, given two supplies working in redundant mode. The W triple-input DC-input power supply requires a minimum draw from the system that it is installed in. Table A shows the minimum draw for the possible modes.
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Table A Minimum Load Table. Table A lists the specifications for the W AC-input power supply. Indicates whether the input voltage is within the required range:. Input voltage is present, but is below required range.
Input voltage is below the required range or the power supply is off.
The power supply output capacity is dependent on the number of AC power cords 1 or 2 attached, the source AC voltage VAC [low-line] or VAC [high-line] applied to the power supply inputs, and the number of power supply power switches switched on or off.
Note The W AC power supply should not be used in mixed-voltage configurations. Table A shows the wattage output possible from a W power supply in redundant mode. In redundant mode, the two power supplies must have the same number of inputs and all inputs must be the same voltage.
If the input voltages to the power supplies are mismatched, choose the value matching the weaker of the two power supplies.
Table A Redundant Mode Output. Table A shows the maximum output wattage with two W AC-input power supplies operating in combined mode. International including Argentina and South Africa.
Table A lists the specifications for the W AC-input power supplies. Total output depends on the number of inputs connected and the source AC voltage. If two inputs are used, they should both be of the same AC voltage. Note The W AC-input power supply should not be used in mixed-voltage configurations.
Table A shows the wattage output possible from a W AC-input power supply in redundant mode. In redundant mode, two power supplies must have identical inputs and all inputs must be at the same voltage.
If the input voltages are mismatched, choose the value matching the weaker of the two power supplies. Table A shows the maximum output wattage with two W AC-input power supplies in combined mode.
Table A Combined Mode Output. The table includes references to power cord illustrations. The W AC-input power supply is equipped with a remote power cycling feature that allows you to remotely turn on or turn off the power supply through an external relay controller box. A three-position terminal block, located on the lower right quadrant of the power supply faceplate, provides the interface to the external relay controller box.
See Figure A A plastic bag containing one ferrite bead and two 4-inch plastic ties is included with the W power supply AC power cords.
The ferrite bead is a passive device that limits high-frequency interference on interface and control cables and is only required when you install the remote power-cycling feature that is supported by the W power supply.
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The ferrite bead is installed on the two control wires that come from the relay controller box to the terminal block on the W power supply. The ferrite bead should be installed as close as possible to the power supply terminal block for the bead to be effective.
You do not need the ferrite bead for W power supply installations that do not include the remote power-cycling feature. This feature allows you to remotely power cycle the Catalyst E-series switch using any appropriate third-party relay controller. This feature eliminates the need for you to have access to the supervisor engine console or CLI to control power cycling.
Table A lists the relay controller box relay type, the corresponding power supply terminal block positions, and a description of the power-cycling operation. Pin IN is connected to the input pin either pin 1, 4, 10, or 13 of the line receiver, and pin GND is connected to ground.
A capacitor of 1 uF should be used between the line receiver input and the ground to bypass noise peaks. No relay attached.
Remote power-cycling feature not installed. Autoranging inputs with power factor correction PFC. Note Mixed voltage input mode operation is supported. However, with mixed voltage inputs, output power defaults to the triple VAC output limits.
Total output power depends on the number of inputs connected and the available source AC voltage. If more than one input is used, all inputs be the same AC voltage either high-line or low-line.
System software detects how many of the source AC input lines on the power supply are powered and at what voltage low-line or high-line they are operating at. In redundant mode, the switch uses one power supply as the primary supply and the second power supply as a backup.
If the primary power supply fails, the second power supply immediately supports the switch without disruption to the switch operation. Table A shows the wattage output possible from a W AC-input power supply operating in redundant mode. Note In redundant mode, the two power supplies must have identical inputs and all inputs must be at the same voltage.
If either of the two power supplies is unpowered, there is no redundancy. This allows for greater utilization of the power supplies with increased PoE densities.
In the event of a power supply failure, the system powers down all devices except the supervisor. During this time, there will be a temporary network outage while power is restored to the system.
Table A lists the power supply input voltage combinations, the power share ratio between the two supplies and the power available to the chassis. With the environmental monitoring and reporting feature, you can keep your system running by resolving adverse environmental conditions before a loss of operation. The power supply monitors its own internal temperature and voltages.