Magnum Quad-Series Fiber Switches | Installation and User Guide (06/03) |
DC Power Connector: 3 terminals: “-“, “GND”, “+”
Input Voltage: 36 - 70 VDC
Power Supply (Internal 24 VDC Option)
DC Power Connector: 3 terminals: “-“, “GND”, “+”
Input Voltage: 20-36 VDC
Power Supply (Internal 125 or 100VDC Option)
DC Power Connector: 3 terminals: “-“, “GND”, “+”
Input Voltage: “125” = 120 - 160 VDC range, “100” = 90 to 160VDC range Surge Suppression: Varistors are installed inside to avoid QS internal damage from power spikes or excess outside electrical noise coming in on the DC power input lines
Power Consumption: all DC Model QS5108, QS5116: 30 watt typical,50 watts max.
With the exception of the power supply, all specifications and functions of Magnum Quad-Series Switches-48VDC, 24VDC, 100VDC and 125VDC models are identical to those listed in the main manual.
B2.0 -48VDC, 24, 100, and 125VDC POWER OPTION, THEORY OF OPERATION
The -48VDC, 24, 100 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 | | | POWER SWITCH | | | HUB |
| | | | | | | | |
only flow into the unit. This allows the Quad- | | | | | | | | | | |
| | | | | | | SUPPLY |
Series Switches to operate only whenever DC | A+ | | | | | | | + |
A- | | | | | | | | | - FUSE |
| | | | | | | |
power is correctly applied to the two inputs. | | | | | | | | | | |
| | | | | | | | | |
It protects the Quad-Series Switches from | GND | CHASSIS |
incorrect DC input connections. An incorrect | | GND |
| |
polarity connection, for example, will neither affect the Quad-Series Switches, 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 ETHERNET SWITCHES
Magnum Quad-Series Switches are easily installed in a variety of applications where -48VDC, 24, 100 or 125VDC power is used as the primary power source. The DC power configurationcapability 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 other communication companies. In addition, many high availability equipment services, such as broadcasters, publishers, newspaper operations, brokerage firms and other facilities often use a battery backup system to maintain operations in the event of a power failure. It is also frequently used for computer system backup, management and operations monitoring equipment.
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