Ericsson RBS 2106 Hardware Reference Manual page 95

RBS 2206
Fuses
Table 14 –(48 – 60) V DC fuse recommendation
Minimum for Safe
Function
4x32 A
7.4 Battery Back-up
Battery back-up is used to power the site during mains failure and to protect
the site from short interruptions in the AC mains supply. It is available in an
external cabinet.
It is possible to supply external transmission equipment from the battery
cabinet. The transmission equipment is then provided with power supply
longer than the RBS. In the event of mains failure, the batteries in the BBS
2000 or BBS 2202 will deliver the necessary power to the radio cabinet as well
as to the transmission equipment, if used. This enables the radio system to
continue operating during mains failure.
Battery back-up can be delivered for 1, 2, 4, 6 or 8 hours back-up time,
depending on the chosen configuration of the RBS. The BBS can feed +24 V
DC or -48 V DC to the TM equipment. The -48 V DC supply requires an
internal DC/DC converter in the BBS. It is possible to share battery back-up
between an RBS 2202 and an RBS 2206.
7.5 Power Consumption
The power consumption figures shown in the table below are for dimensioning
cables and fuses. The figures in the table have been rounded off.
Table 15 Higher power consumption
RBS 2206 Cabinet (fully
equipped)
Maximum power
consumption
(1)
The RBS can supply transmission equipment with +24 V DC. The maximum
power output is 250 W.
8 Transmission
The RBS 2206 is normally connected to a Distribution Frame (DF) for
transmission (PCM lines). Four PCM cables are connected to the ports on the
front of the DXU. The RBS 2206 supports two transmission standards:
EN/LZT 720 0225 R3A
Power consumption during maximum battery charging
Recommended for
Maximum Selectivity
4x35 A
Power Supply Voltage
120 –250 V AC +24 V DC
(1)
3.2/5.7 kW 2.7 kW
Radio Base Station
Maximum Allowed
Fuse Rating
4x40 A
-48 V DC
3.2 kW
21 (24)