User's Manual

AXELL MBF -40 AMERICAS REPEATERS
PRODUCT DESCRIPTION AND USER’S MANUAL
44 Doc. No. 00071UM Rev. 3.4 © Axell Wireless Ltd
3.9.5 -48V Power Source Connection
Note: The -48VDC version of the power supply is designed to turn off if the supply voltage falls below
-36V (±1V), not to drain the feeding battery. It will turn on again as the supply voltage reaches -43V
(± 1V).
-48V power supply requirements
The 48VDC power supply must comply with SELV requirements, as defined in EN60950,
which implies double isolation. The output power needs to be 48VDC +25%/-15%. The
maximum input current is 8A.
Connect the power cable to the plinth as show below:
• Phase linked to the Brown cable
• Neutral linked to the Blue
• Ground to the Green and Yellow. See illustration below.
Figure 3-35: -48VDC Power Connections
Recommended cable areas for 48VDC
Distance Cable Area
0 -
10 meters between
repeater and power supply
2,5 mm²
10 –
50 meters between
repeater and power supply
4 mm²
Over 50 meters between
repeater and power supply
Recommendation is to
reconfigure the installation, or
to make special arrangements
to increase cable area