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Magnum XS 450 Power System –48 VDC User’s Manual Page 34
5.3 DC Distribution
DC Distribution Module
The main function of the dc distribution module is to provide a means of connecting and
protecting cables that will be connected to power dc loads. The dc distribution modules also
interface with the main controller to monitor the status of breakers and fuses protecting the
dc loads. LVD contactors and control boards are incorporated into the various dc distribution
modules.
DC Return Module
The function of the dc return modules are to provide a means of connecting return cables
that will be connected to power dc loads.
5.4 Battery Management
Battery Disconnect Module
The main function of the dc distribution module is to provide a means of connecting and
protecting cables that will be connected to the batteries. The battery disconnect module also
interface with the main controller to monitor the status of breakers protecting the battery
cables. The module also can house an LVD to disconnect the battery in the event of a deep
discharge. The LVD contactors and control boards are incorporated into the battery
disconnect module.
Battery Return Module
The function of the battery return module is to provide a means of connecting return cables
that will be connected to batteries. Battery Current is monitored with a shunt on the battery
return module.
Battery Shelves
Two internal battery shelves can be installed in the power system. (4) 12-Volt Mono-blocks
can be installed in each battery tray. Only Valve Regulated Lead Acid (VRLA) type batteries
are recommended for use in the battery shelves. APC offers multiple battery solutions that
will fit on the battery shelves ranging in capacity from 25 AH to 170 AH. For assistance in
selecting batteries appropriate to your specific application, please contact APC Customer
service in your area or contact your local APC distributor.
Battery Cabinet
An external battery cabinet is available with four battery trays. A disconnect panel located in
the top of the cabinet house a disconnect for each battery tray.