User Manual

Table Of Contents
RBS 2107
FCU
The Fan Control Unit (FCU) controls the fans in the cooling system by
regulating fan speed. The FCU is controlled by the DXU.
Number of units: 1
IDM
The Internal Distribution Module (IDM) is a panel for distributing the internal
+24 V DC power to the various units. Each distribution circuit in the cabinet
is connected to a circuit breaker in the IDM.
Number of units: 1
PSU
The PSU converts 120 – 250 V to regulated +24 V
DC. Number of units: 2 – 3
DF
The Distribution Frame (DF) is a connection field for external alarms,
ESB, PCM links, GPS, and DC out. It also provides space for optional
configuration-dependent overvoltage protection.
Number of units: 1
Optional Hardware Units
This section describes the RBS 2107 optional hardware units.
Battery Backup
Batteries can be installed inside the cabinet in the upper or both battery shelves
located to the left. An external source of battery supply can also be used
through the DC filter. If this is the case, then internal batteries cannot be used.
Bias Injector
The bias injectors are used to provide the TMA with DC power from the
TMA-CM over the RX/TX feeder cables. The bias injectors are attached at the
antenna feeder inlet.
14 (28) EN/LZT 720 0491 Uen R2A