User's Manual

Table Of Contents
Installation 27
-48 VDC Operation
The BTS is shipped from the factory with the internal cabling routed from the DC power supply subrack
assembly to a molex connector on the top rear of the cabinet. A power supply cable is included with the
BTS which should be used to connect to your DC power supply or battery backup system.
Use the following procedure:
1 Verify the ground connection you made in Section 2-4.1 is secure. The cabinet power
supply 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 2-8 for the location of the power supply power buttons.
3 Verify that the-48 VDC power source is off.
4 The -48 VDC power cable has two wires for the positive (+) connection and two wires for the
negative (-) connection. This spreads the current draw across two pins of the molex
connector for each connection.
Attach the two positive (+) cables to the positive side of your -48 VDC power source.
5 Attach the two negative (-) cables to the negative side of your -48 VDC power source.
6 Plug the molex power connector into the power connection on the top of the cabinet.
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.
Do not use the DC power supply circuit breaker to apply power to the
chassis at this time. Wait until you are performing the off-line
commissioning procedures in the next chapter.
CAUTION: THE POWER SUPPLY CORD IS USED AS THE MAIN
DISCONNECT DEVICE, ENSURE THAT THE SOCKET-OUTLET IS
LOCATED/INSTALLED NEAR THE EQUIPMENT AND IS EASILY
ACCESSIBLE.
ATTENTION: LE CORDON D'ALIMENTATION EST UTILISÉ COMME
INTERRUPTEUR GÉNÉRAL. LA PRISE DE COURANT DOIT ÊTRE SITUÉE
OU INSTALLÉE À PROXIMITÉ DU MATÉRIEL ET ÊTRE FACILE D'ACCÉS.
Warnung: Das Netzkabel dient als Netzschalter. Stellen Sie sicher, das
die Steckdose einfach zugänglich ist.