Description
Technical Specifications and features of Switching PSU
The N9K-PAC-650W Cisco 650 Watt Power Supply is a power supply unit for use in Cisco Nexus 9300 series switches. It is an AC-input, DC-output power supply that provides up to 650 watts of power. The following are the technical specifications and features of the N9K-PAC-650W:
- Input Voltage: The input voltage range is 100-240 VAC and supports a frequency of 47-63 Hz.
- Output Voltage: The output voltage is -48 VDC.
- Power Output: The N9K-PAC-650W provides a maximum power output of 650 watts.
- Efficiency: The power supply has a typical efficiency of 94%.
- Power Factor Correction: The power supply has an input power factor correction of 0.99.
- Cooling: The power supply uses a fan-based cooling system to dissipate heat.
- Dimensions: The N9K-PAC-650W has dimensions of 8.66 x 4.36 x 1.65 inches (219.5 x 110.8 x 41.9 mm).
- Operating Temperature: The power supply can operate in temperatures ranging from 32°F to 104°F (0°C to 40°C).
- Safety Approvals: The power supply is certified for safety and environmental standards, including UL, cUL, CE, and RoHS.
- Compatibility: The N9K-PAC-650W is compatible with Cisco Nexus 9300 series switches.
Performance and Reliability
The N9K-PAC-650W is a 650 watt power supply unit designed and manufactured by Cisco Systems. It is designed to provide reliable and high-performance power to Cisco Nexus 9000 series switches.
Reliability: The N9K-PAC-650W has several built-in features that ensure its reliability. Firstly, it has a wide input voltage range which allows it to operate in different power environments. Secondly, it has a redundant design which means that if one power supply fails, the other one can take over, providing uninterrupted power supply to the switch. Additionally, it has an active power-sharing mechanism which ensures that the power supply operates within its specifications, avoiding overloading and ensuring maximum performance.
Performance: The N9K-PAC-650W has a high efficiency rating of 94% which means that it is capable of converting more of the power it draws from the AC mains into usable DC power. This helps to reduce the amount of heat generated and saves energy. Additionally, it has a low ripple and noise specification which ensures that the DC output is clean and stable, reducing the risk of electrical interference and prolonging the lifespan of the connected components.
In conclusion, the N9K-PAC-650W is a highly reliable and high-performing power supply unit that provides stable power to Cisco Nexus 9000 series switches. With its redundant design, active power sharing, high efficiency, and low ripple and noise specification, it ensures that the switch operates smoothly and efficiently.
Installation and Setup of Power Supply
- Unpacking: Begin by unpacking the N9K-PAC-650W power supply and checking it against the packing list to make sure everything is included.
- Power Source: Connect the power source to the power supply using a power cord.
- Equipment: Mount the power supply in a switch or other equipment. Make sure that the power supply is securely fastened in place.
- Cabling: Connect the power supply to the equipment using the appropriate cables. The power supply has two power connectors, one for input and one for output.
- Power-on: Once the cabling is complete, power on the equipment. The power supply will automatically start providing power to the equipment.
- Status Indicator: The power supply has a status indicator that will turn green when it is operating normally and red when there is a problem.
- Configuration: If necessary, configure the power supply using the appropriate commands. The power supply can be managed and monitored using Cisco Network Assistant or the command-line interface.
- Verification: Finally, verify that the power supply is functioning correctly. Check the status indicator and make sure that the equipment is receiving the correct voltage and current.
General Information about this Cisco N9K-PAC-650W
- Manufacturer: Cisco
- Model Number or SKU# N9K-PAC-650W
- Product Type: Power Supply
Power Description for 650 Watt Power Supply
- Power Supply Unit: Switching PSU
- Input Voltage 220 V AC
- Input Voltage 110 V AC
- Input Voltage Range 100 V AC to 240 V AC
- Frequency 60 Hz
- Frequency 50 Hz
- Output Power 650 W
Miscellaneous of AC Switching PSU
- Compatibility Cisco Nexus 9300 Switches Series







