B3.0 APPLICATIONS FOR DC POWERED SWITCHES
RFL 3000 4K-Series Fiber Switches are easily installed in a variety of
applications where -48VDC, 24VDC & 125VDC power is used as the primary power
source. The- 48VDC, 24VDC & 125VDC power configuration provides an Ethernet
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 and 125VDC solution are particularly useful in the Industrial
environment, where it is common for facilities to operate on 24VDC or 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 RFL 3000 Ks.
(see figure at the right).
In this picture, the
-48VDC terminal block on the RFL 3000 4Ks is located on the rear of the unit and is
equipped with three (3) screw-down lead posts. It is similar for 24VDC and 125VDC
options on RFL 3000 4Ks. The leads are identified as negative (-), positive (+), and
chassis ground (GND).
36-70VDC
_
+
GND
ON
OFF
Figure B4.1: -48VDC Terminal Block on RFL 3000 Ks-48VDC
