GarrettCom Magnum 6K16-Series Installation And User Manual page 71

Magnum 6K16-Series Managed Fiber Switch Installation and User Guide (04/06)
Power Supply (Internal, -48VDC Dual-Source, model # Dual-Src-48V)
DC Power Connector: First Source: "A+", "A
GND:
Input:
Power Supply (Internal, 24VDC Dual-Source, model # Dual-Src-24V)
DC Power Connector: First Source: "A+", "A
GND:
Input:
Power Supply (Internal, 125VDC Dual-Source, model # Dual-Src-125V)
DC Power Connector: First Source: "A+", "A
GND:
Input:
With the exception of the dual DC input power connections and the power
supply, all specifications and configuration options for the Magnum 6K16-Series -48VDC,
24VDC and 125VDC models with this Dual-Source option are identical to those listed in
the Magnum 6K16-Series Fiber Switches Installation and User Guide, including
Appendix B "Internal DC Power Supply Option"
C2.0 MAGNUM 6K16-SERIES, with -48VDC, 24VDC and 125VDC Dual-Source
option
The 6K16-Series-Switch models with the internal -48VDC, 24VDC and
125VDC Dual-Source power supply are designed for installations where a battery plant
is the power source, and where two separate power sources are utilized in order to
increase operational uptime and to simplify maintenance.
The functionality of the Magnum 6K16-Series Switch -48VDC, 24VDC and
125VDC Dual-Source Option units is identical to the standard AC-powered models.
Refer to the main sections of this Installation and User Guide for a detailed description
of the Magnum 6K16-Series Switches.
C3.0 DUAL-SOURCE OPTION, THEORY OF OPERATION
The Dual-Source DC power
option is designed using diodes inside
of the chassis on each DC power input
line. A diode is placed in each of the
four input lines (behind the four
external power connection terminals)
so that power from an external source
can only flow into the unit. This allows the unit to operate whenever DC power is
correctly applied to either or both of the two inputs
C4.0 FEATURES AND BENEFITS OF THE DUAL-SOURCE DESIGN
a) The Switch unit can receive power from either input, "A" or "B". The hub will normally draw
www GarrettCom com . .
Terminal for "earth" or ground wire connection to the hub chassis
Two separate sources, each at 36 - 70 VDC
Terminal for "earth" or ground wire connection to the hub chassis
Two separate sources, each at 20 - 36 VDC
Terminal for "earth" or ground wire connection to the hub chassis
Two separate sources, each at 115 - 150 VDC
-"
, 2nd Source "B
-"
, 2nd Source "B
-"
, 2nd Source "B
A+
A-
B-
B+
GND
63
-
", "B+"
-
", "B+"
-
", "B+"
HUB
SUPPLY
+
- FUSE
CHASSIS
GND