GarrettCom 4K-Series manual Power Supply Internal 125 VDC Option Industrial Application

Magnum 4K8 Switches Installation and User Guide (10/04)

APPENDIX B : INTERNAL DC POWER SUPPLY OPTIONS

B1.0 SPECIFICATIONS - FOR MAGNUM 4K8 DC-POWERED SWITCHES Power Supply (Internal -48VDC Option)

DC Power Connector: 3 terminals: “-“, “GND”, “+”

Input Voltage: 36 - 70 VDC

Power Consumption: Model 4K8: 9 watt typical, 11 watts max.

Power Supply (Internal 24 VDC Option) Industrial Application DC Power Connector: 3 terminals: “-“, “GND”, “+” Input Voltage: 20 - 36 VDC

Power Consumption: Model 4K8: 9 watt typical, 11 watts max.

Power Supply (Internal 125 VDC Option) Industrial Application

DC Power Connector: 3 terminals: “-“, “GND”, “+”

Input Voltage: 120 - 160 VDC

Power Consumption: Model 4K8: 9 watt typical, 11 watts max.

With the exception of the power supply, all specifications and functions of Magnum 4K-Series-48VDC, 24VDC and 125VDC models are identical to those listed in the main manual.

B2.0-48VDC, 24VDC & 125VDC POWER OPTION, THEORY OF OPERATION

The -48VDC, 24VDC & 125VDC power option 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

A+

A-

GND

POWER SWITCH	HUB
	SUPPLY
	+
	- FUSE
	CHASSIS
	GND

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.

B3.0 APPLICATIONS FOR DC POWERED SWITCHES

Magnum 4K-Series Fiber Switches are easily installed in a variety of applications where -48VDC, 24VDC & 125VDC power is used as the primary power source. The- 48VDC, 24VDC & 125VDC power configuration provides an Ethernet networking solution utilizing a special power supply in hubs with a proven track record.

The –48VDC solution is particularly useful in the telecommunication industry,

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