Dante DFG48044X Manuale di installazione e funzionamento - Pagina 12
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Stampa la pagina3.7 DFG48044X Series, DC-powered, 12VDC Installation
This section describes the proper connection of the 12VDC leads to
the DC power terminal block on the DFG48044X Edge Switch (as
shown in the Figure). The DC terminal block on the DFG48044X is
located on the left side of the unit and is equipped with three (3)
screw-down lead posts. The power terminals are identified as
positive (+) and negative (-), and they are floating inside the unit
so that either of the terminals may be grounded by the user if
desired. The chassis is "earth" or ground (GND). The connection
procedure is straightforward. Simply insert the DC leads to the
DFG48044X's power terminals, positive (+) and negative (-)
screws. The use of Ground (GND) optional; it connects to the
DFG48044X chassis. Ensure that each lead is securely tightened
from the top, as shown on above picture with arrow.
NOTE: Always use a voltmeter to measure the voltage of the incoming power supply and figure out the
+ve potential lead or -ve potential lead. The more +ve potential lead will connect to the post labeled
"+ve" and the rest to the "-ve". The GND can be hooked up at the last. When power is applied, the green
PWR LED will illuminate.
3.8 Connecting Ethernet Media
The DFG48044X Edge Switches can be connected to two media types i.e. fiber and copper (RJ-45) types,
runt at 100BASE-TX, 10BASE-T and 100BASE-FX only. CAT 5 cables should be used when making 100BASE-TX
connections. When the ports are used as 10BASE-T ports, CAT 3 may be used. In either case, the maximum
distance for unshielded twisted pair cabling is 100 meters (328 ft). For fiber port 10BASE-FL or 100BASE-FX
multi-mode, 50/125 or 62.5/125 microns cabling can be used, whereas for single-mode, 9/125 microns cabling
should be used. Fiber cabling supports much longer cable distance and higher bandwidths as compared to copper
wiring.
Media IEEE Standard Connector
Twisted Pair (CAT 3 or 5) 10BASE-T RJ-45
Twisted Pair (CAT 5) 100BASE-TX RJ-45
Fiber (Multi-mode) 100BASE-FX ST, SC
Fiber (Single-mode) 100BASE-FX SC, LC
NOTE: It is recommended that high quality CAT. 5 cables (which work for both 10 Mbps and 100Mbps) be used
whenever possible in order to provide flexibility in a mixed-speed network, since DFG48044X switch ports
are auto-sensing for either 10 and 100Mbps. Note that the auto-cross function does not operate, if the
port is fixed or not supporting auto-negotiation.