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B–4 MULTILINK ML1200 MANAGED FIELD SWITCH – INSTRUCTION MANUAL
DC POWER INPUT CHAPTER B: DC POWER INPUT
B.3 Applications for DC Powered Ethernet Switches
Multilink ML1200 Switches are easily installed in a variety of applications where -48VDC,
24, or 125VDC 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.