GarrettCom Magnum 6K8 Hardware Installation And User's Manual page 71

Magnum 6K8-Series Industrial Field Switch
DC Power Terminals: "+", "
GND: Terminal for "earth" or ground wire connection to the 6K8-Series chassis
Input Voltage: 18 to 36 VDC (24VDC)
Input current: 0.6Amps max. (for all RJ-45 ports)
Input current: 1.2Amps max. (for all Fiber ports)
Input Voltage: -36 to -70 VDC (-48VDC)
Input current: 0.4Amps max. (for all RJ-45 ports)
Input current: 0.7Amps max. (for all Fiber ports)
Input Voltage: 88 to 300 VDC (125VDC)
Input current: 0.1Amps max. (for all RJ-45 ports)
Input current: 0.125Amps max. (for all Fiber ports)
Power Consumption: 25 watts max, for fully loaded (fiber ports)
(24V, -48V, 125V) DC 8 watts typical for all (RJ-45 Ports)
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 switch. 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 or its internal
power supply. Nor will it blow the fuse in the
internal power supply.
B3.0 APPLICATIONS FOR DC
POWERED ETHERNET SWITCHES
Magnum 6K8-Series Switches are
easily installed in a variety of applications where -48VDC, 24, or 125VDC or 5VDC
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.
www GarrettCom com . .
- ,
" internally floating
A+
A-
GND
66
Installation and User Guide (04/07)
DC terminal
block
Switch
SUPPL
+
FUS
-
CHASSIS
GND