Magnum 6KQE Managed Edge Switch Installation and User Guide 02/09
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connection, for example, will neither affect the Switch, its internal power supply, nor will
it blow the fuse in the internal power supply.
B3.0
APPLICATIONS FOR DC POWERED ETHERNET SWITCHES
Magnum 6KQE Switches are easily installed in a variety of applications where
12, 24, -48VDC, 125 and 250VDC power is used as the primary power source. The DC
power configuration capability provides an Ethernet networking solution utilizing a
special power supply in switches with a proven track record.
The –48VDC solution is particularly useful in the telecommunication industry,
where it is common for facilities to operate on -48VDC power. Such companies include
regular and wireless telephone service providers, Internet Service Providers (ISPs) and
other communication companies. In addition, many high availability equipment services,
such as broadcasters, publishers, newspaper operations, brokerage firms and other
facilities often use a battery backup system to maintain operations in the event of a power
failure. It is also frequently used for computer system backup, management and
operations monitoring equipment.
The 24V and 125VDC options are particularly useful in the industrial
environment, where it is common for facilities to operate on 24VDC or 125VDC power.
The 125VDC options are mainly used in power utilities, such as electrical substations,
electrical generating plants, etc. The 24VDC applications are mainly in heavy duty
industrial automation such as factory floor, process plants, HVAC, military equipment,
etc.
B4.0 6KQE, 12, 24, –48, 125 and 250VDC INSTALLATION
This section describes the proper connection of the 12, 24, –48, 125 and
250VDC leads to the DC power terminal block on the Magnum 6KQE Switch.
The DC
terminal block on the Magnum 6KQE Managed Switch is located on the left front of the
unit and is equipped with four (4) screw-down lead posts. The power terminals are
identified as positive (+) and negative (-), and they are electrically floating inside the unit
so that either may be grounded by the user if desired. The chassis is “earth” or ground
(GND).
The connection procedure is straightforward. Simply insert the DC leads to the
Switch’s power terminals, positive (+) and negative (-) screws. The use of Ground
(GND) connects to the Switch chassis screw provided under the DC terminal. Ensure that
each lead is securely tightened.
NOTE: Always use a voltmeter to measure the voltage of the incoming power supply
and figure out the +ve potential lead or -ve potential lead. The more +ve potential lead
will connect to the post labeled “+ve” and the rest to the “-ve”. The GND can be
hooked up at the last
