Magnum 4K220 Switches Installation and User Guide (10/04)
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networking solution utilizing a special power supply in hubs 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 24VDC & 125VDC solution are particularly useful in the
Industrial environment, where it is common facilities to operate on 24VDC & 125VDC
power. The 125VDC solution is mainly used in Utilities Industries, such as Electric
substation, Electrical generating plant etc. Whereas 24VDC application is mainly in the
Industrial environment, such as chemical plants, paper mill, stone quarrying plant,
wastewater treatment Plant etc.
B4.0 INSTALLATION
This section describes the installation of the -48 VDC, 24VDC & 125VDC
power source leads to the -48 VDC, 24VDC & 125VDC power terminal block on the
Magnum 4Ks. (see figure below).
Figure B4.1: -48VDC Terminal
Block on Magnum 4Ks-48VDC
The -48VDC terminal
block on the Magnum Ks is
located on the rear of the unit and
is equipped with three (3) screw-down lead posts and it is similar for 24VDC and
125VDC Magnum 4Ks too. The leads are identified as negative (-), positive (+), and
chassis ground (GND). The actual connection procedure is very straightforward.
Simply connect the leads to the Magnum unit, beginning with ground. Ensure that each
lead is securely tightened.
Note: Before connecting to Terminal Block of –48VDC, 24VDC or 125VDC, always
use a digital voltmeter to measure the output voltage of the power supply and
determine the lead which is more “+ve potential Lead”. The more “+ve” voltage
terminal lead from 48V or –48V Power supply must be connected to the post labeled
“+”.
The GND can be hooked at the last.
36-70VDC
_
+
GND
ON
OFF
