GarrettCom Magnum 20X - Manual (Page 36)

B1.0
SPECIFICATIONS - FOR MAGNUM 210X TWO-PORT REPEATERS
Power Supply (Internal 48 VDC Option)
DC Power Connector: 3 terminals: “
-
“, “GND”, “+”
Input Voltage: 36 - 70 VDC (auto-ranging)
Power Consumption: Model 210X: 8 watt typical, 15 watts max.
With the exception of the power supply, all specifications and functions of
Magnum 210X-48VDC models are identical to Magnum 200X listed in the main
manual.
B2.0 48V DC POWER OPTION, THEORY OF OPERATION
The 48VDC power option is 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
repeater. This allows the repeater to operate
only whenever DC power is correctly
applied to the two inputs. It protects the
repeater from incorrect DC input
connections. An incorrect polarity connection, for example, will neither effect the repeater,
nor its power supply internally, nor will it blow the fuse in the internal power supply.
B3.0 APPLICATIONS
Magnum 210X repeaters are easily installed in a variety of applications where 48
VDC power is used as the primary power source. The 48VDC power configuration
provides an Ethernet networking solution utilizing a special power supply in hubs with a
proven track record.
The solution is particularly useful in the telecommunication industry, where it is
common for facilities to operate on 48VDC power. Such companies include regular and
wireless telephone service providers, Internet Service Providers (ISPs) and other
36-75VDC
_
G N D
A+
A-
GND
GND
CHASSIS
FUSE
+
-
SUPPLY
REPEATER
POWER SWITCH