User's Manual

UltraWAVE Micro BTS Installation and Commissioning Guide, Version B 45
Connecting Power Supplies
Connecting the DC Power Supply to the Cabinet
Use the following procedure:
1 Verify the ground connection you made in Section 2.4.1 is secure. The cabinet
is grounded through this connection. It is critical that this connection is made
properly.
2 Make sure that the power button located on all power supply modules is in the
raised OFF position. See Figure 2-16 for the location of the power supply
power buttons.
3 Verify the -48 VDC power source is off.
4 The -48 VDC power cable has two wires for negative (-) connection and two
wires for return (+) connection. This spreads the current draw across two pins
of the round quick disconnect connector for each connection.
5 Attach the two return (+) cables (white and green) to the positive side of your
-48 VDC power source or to ground if you are using a chassis ground for your
return.
6 Attach the two negative (-) cables (black and red) to the negative side of your
-48 VDC power source.
7 Plug the round quick disconnect connector as illustrated in Figure 2-15 into
the power connection on the top of the cabinet as illustrated in Figure 2-17.
Secure the connector by twisting the connector sleeve until the lines on the
cable connector and chassis connector align.
The power main must be a Safe Extra-Low Voltage (SELV),
-48 VDC supply as defined in IEC950 and EN60950.
Figure 2-16: DC Power Supply Module ON/OFF Switches
IW138604
Power Switches
INPUT
OUTPUT
FAULT
OFF ON
INPUT
OUTPUT
FAULT
OFF ON