Magnum 6K32F/FR/FC/FRC Managed Switch Installation and User Guide (05/08)
APPENDIX B : Internal DC Power Supply Options
B1.0
SPECIFICATIONS FOR MAGNUM 6K32F SERIES SWITCHES, DC
POWER
Power Supply (Internal -48VDC Option)
DC Power Connector: 3 terminals: “
-
“, “GND”, “+”
Input Voltage: 36 - 70 VDC
Power Consumption: Same as for AC models (see Section 1.1)
Power Supply (Internal 24 VDC Option) Industrial Applications
DC Power Connector: 3 terminals: “
-
“, “GND”, “+”
Input Voltage: 20 - 36 VDC
Power Consumption: Same as for AC models (see Section 1.1)
Power Supply (Internal 125 VDC Option) Industrial Applications
DC Power Connector: 3 terminals: “
-
“, “GND”, “+”
Input Voltage: 88 - 150 VDC
Power Consumption: Same as for AC models (see Section 1.1)
With the exception of the power supply, all specifications and
functions of Magnum 6K32F Series Switch -48VDC, 24VDC and 125VDC models
are identical to those listed in the main manual.
B2.0
-48VDC, 24VDC and 125VDC POWER, THEORY OF OPERATION
The -48VDC, 24VDC and
125VDC power options are designed using
diodes inside on each DC power input line
behind the two external power connection
terminals, so that the power from an
external source can only flow into the hub.
This allows the Switch to operate only whenever DC power is correctly applied to the
two inputs. It protects the Switch from incorrect DC input connections. An incorrect
polarity connection, for example, will neither affect the Switch, its internal power supply,
nor will it blow the fuse in the internal power supply.
The manual power “On-Off” Switch (optional) is used for powering the unit on
and off when it is placed into or taken out of service.
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