APPENDIX C: Internal DC Dual-Source Power Option
C1.0 SPECIFICATIONS - FOR RFL 3000 4K-SERIES FIBER SWITCH
Power Supply (Internal, -48VDC Dual-Source, model # Dual-Src-48V)
DC Power Connector: First Source: “A+”, “A-“, 2nd Source “B-“, “B+”
GND: Terminal for “earth” or ground wire connection to the hub chassis
Input: Two separate sources, each at 36 - 70 VDC
Power Consumption: Model -4K24: 21 watt typical, 30 watts max.
Power Supply (Internal, 24VDC Dual-Source, model # Dual-Src-24V)
DC Power Connector: First Source: “A+”, “A-“, 2nd Source “B-“, “B+”
GND: Terminal for “earth” or ground wire connection to the hub chassis
Input: Two separate sources, each at 20 - 36 VDC
Power Consumption: Model -4K24: 21 watt typical, 30 watts max.
Power Supply (Internal, 125VDC Dual-Source, model # Dual-Src-125V)
DC Power Connector: First Source: “A+”, “A-“, 2nd Source “B-“, “B+”
GND: Terminal for “earth” or ground wire connection to the hub chassis
Input: Two separate sources, each at 120 - 160 VDC
Power Consumption: Model -4K24: 21 watt typical, 30 watts max.
With the
exception of the dual DC input power connections and the power supply, all specifications
and configuration options for the RFL 3000 4K8 -48VDC, 4K8-24VDC & 125VDC with
this Dual-Source option are identical to those listed in the
RFL 3000 4K-Series Fiber
Switches Installation and User Guide
, including Appendix B “Internal DC Power Supply
Option”
C2.0 RFL 3000 4K-SERIES , with -48VDC, 24VDC & 125VDC Dual-Source option
The 4K8-Switch models with the internal -48VDC, 24VDC & 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 RFL 3000 4K-Series -48VDC, 24VDC & 125VDC Dual-
Source Option units are identical to the standard AC-powered models. Refer to the main
sections of this
Installation and User Guide
for a detailed description of the RFL 3000
4K-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
