Magnum 6KL Managed Edge Switch Installation and User Guide
11/09
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correctly applied to the two inputs. It protects the Switch from incorrect DC input
connections. An incorrect polarity 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 6KL 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 6KL, 12, 24, –48, 125 and 250VDC INSTALLATION
This section describes the proper connection of the 12, 24, –48, leads to the DC
power terminal block on the Magnum 6KL Switch.
The DC terminal block on the
Magnum 6KL 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.
The connections for 125 and 250VDC are made by a fixed cord exiting the
6KL unit. (see Fig. B4.0a for connection details)
