If in use, remove the strain relief securing the power supply cable to the power supply latch. Depress the power supply latch and use the handle to pull the supply out of the device. Use the handle to push the power supply into the router. The power supply latch should provide an audible click when the supply is fully seated.
If used, reapply the strain relief strap around the power cord and the power supply latch. The DC power supply for this device is shown in the following image:.
In the device, the DC power supply has a terminal block that is installed into the power supply terminal block header. Turn off the circuit breaker from the power source to be connected to the power source.
Ensure the wires to be attached to the power supply are not energized. The wires connecting to the power supply can be stripped back and terminated directly to the power supply terminal block. Alternately a crimp style spade terminal lug can be attached to the end of the wire.
If using a terminal lug, follow the manufacturer's instructions for terminating the lug to the wire. If terminating directly to the terminal block using bare wire, following the directions shown below.
Use a wire-stripping tool to strip each of the two wires coming from the DC input power source to approximately 0. It is recommended that 14 AWG insulated wire be used. Do not strip more than the recommended length of wire because doing so could leave the wire exposed from the terminal block and shows a stripped DC input power source wire. An exposed wire lead from a DC-input power source can conduct harmful levels of electricity.
Be sure that no exposed portion of the DC-input power source wire extends from the connector s or terminal block s. Identify the positive and negative feed positions for the terminal block connection of the voice gateway:. Identify the positive, ground, and negative feed positions for the terminal block connection of the device:. This section describes how to install the DC power supply input power leads to DC input power supply.
Modular power supplies allow the power rails from the PSU to be unplugged both at the component side and on the power supply side. By comparison, a non-modular design has a big bundle of power cables permanently affixed to the steel box of the power supply itself. This makes running the power cables easier, keeps things looking tidier, and helping preserve good air flow in the case.
They can be a handy compromise. If your home or office is particularly susceptible to static electricity, you might also want an anti-static bracelet. There are high-power capacitors inside that can injure or kill you if they discharge. Power down your PC, remove all the power and data cables, and then move it to your work area. On a standard ATX case, these are on the right and left sides, held in place with screws on the back of the computer. Remove these screws two or three on a side , then pull back the access panels and set them aside.
If you use a small form factor or other non-standard case, consult the manual. Now, identify all of the components plugged into your power supply. On a standard PC build, this will be:. Check from both sides of your PC and multiple angles: excess lengths of power and data cables are often stored behind the metal motherboard mounting tray. If you have to remove anything to get to these plugs, especially data cables, remember their original positions and restore them as you have access. Taking pictures as you go is a great idea.
If your power supply is modular, you also can remove the power rails from the back of the power supply housing. Carefully pull them free of the PC case itself and set them aside. Now turn your attention to the back of the PC. The power supply is held in place with three to five screws that are accessible from the outside of the PC case. Remove them and set them aside. Some case designs differ; if you see more screws in non-standard locations on the power supply, remove them too.
With all the cables unplugged and the retention screws removed, you can now pull the power supply free of the case. Depending on where the power supply is placed top or bottom of the case and what other components are nearby, pulling it out of the case might be easy or might be challenging.
Place the new power supply in position in your PC. So if the power supply is mounted at the top of the case, point the exhaust fan up. Secure the power supply to the rear of the PC case with the retention screws, screwing from the outside of the case into the metal housing of the power supply. If your power supply is modular, plug the cables into their sockets on the back of the supply itself.
Refer to your computer's instruction manual for the proper placement of the power supply unit, or look for a rectangular cut-out on the back of the case. If you're removing an old power supply, look for a power plug on the back of the case to find the power supply. Insert the power supply. The power supply should have a distinct "back" with plugs and a fan, as well as a "bottom" with a fan on it. The "back" should face the back of the case, while the "bottom" should face the internal part of the case.
If you have an old power supply in your computer, remove it first. Screw the power supply into place. With the "back" of the power supply unit pressed against the back of the case, insert the included screws to lock the power supply into place.
Many CPU housings have shelves on which the power supply will rest. Attach the power supply to the motherboard. Find the main power cable on the power supply usually the one with the largest plug and attach it to the long, rectangular port on the motherboard, then attach the secondary power cable to the motherboard. Depending on your power supply and motherboard, you may not have a secondary power cable. The plug used to attach the power supply to the motherboard is usually a or pin connector.
Connect the power supply to other computer components. Using the smaller cables, connect the power supply to your computer's hard drive, CD drive, and graphics card. If you have other components in your case e. Close and plug back in your PC. Place the cover back on the PC, then stand it up and plug it back into the wall and your monitor. Turn on your computer. If everything is connected and powered properly, the fan on the power supply should turn on and your computer will boot like usual.
If you hear a beep and nothing happens, then something inside is not connected correctly, or the power supply is not providing enough power to your components. Yes No. Not Helpful 11 Helpful You can either buy a PSU tester or take a paper clip and fold it into a U-shape.
Then put the other end in the slot that any black wire runs in. Plug the PSU into a wall plug, and flip the switch on. Not Helpful 51 Helpful It depends on whether you want the power supply to affect the air pressure of the machine.
If you want to have a more negative air pressure, aim the fan into the case. However, this could lead to a slight temp increase for the PSU, which could, in turn, mean louder operation.
Not Helpful 17 Helpful In regards to the type of cable needed for them, there is no difference. Not Helpful 1 Helpful 4. 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.
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