GarrettCom 6K8 manual B2.0 -48VDC, 24VDC and 125VDC POWER, Theory of Operation

DC terminal block

Magnum 6K8-Series Industrial Field Switch Installation and User Guide (04/07)

DC Power Terminals: “+”, “-”,internally floating

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		Switch
		SUPPL
allows the Switch to operate only	A+	+ FUS
	A-	-
whenever DC power is correctly applied
to the two inputs. It protects the Switch	GND	CHASSIS
		GND

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.

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