GarrettCom Magnum 6KQ manual Standard 6KQ DC Power Input Terminal Block -, GND, +

Magnum 6KQ Managed Field Switch Installation and User Guide (04/07)

APPENDIX B : DC Power Input

B1.0 Specifications for Magnum 6KQ Switches, DC Power at 24V and – 48V and 125V DC Power input

Each Magnum Model 6KQ Managed Switch requires DC power input, at either 24VDC, -48VDC or 125VDC nominal. The wide range of DC power input types qualifies this product for use in 24VDC, -48VDC as well as 125VDC applications in different industries.

DC Power Terminals: “+”, “-” are internally floating so that user may ground either

GND: ground wire connection to the 6KQ chassis screw

Power Consumption:

35 watts typical (for a fully loaded fiber model)

12 watts typical (for a small 4 port copper-only model)

24VDC Power Input nominal (18 to 36VDC range) -48VDC Power Input nominal (36 to 60 VDC range) 125VDC Power Input nominal (88 to 150VDC range)

Standard 6KQ DC Power Input Terminal Block : “ -, GND, + ”

See also Section 1.0, Technical Specifications, for the 6KQ base unit

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

A+

A-

GND

POWER SWITCH	HUB
	SUPPLY
	+
	- FUSE
	CHASSIS
	GND

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.

B3.0 APPLICATIONS FOR DC POWERED ETHERNET SWITCHES

Magnum 6KQ Switches are easily installed in a variety of applications where - 48VDC, 24, or 125VDC 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.

The –48VDC 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

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