BRU3 LOGIC AND RADIO SYSTEM
25 (34)
BRU3 MANUAL, Doc.no: 155 16-ANNA 805 08 Uen, Rev H, 2003-02-07
The power supply parts are to be used for:
•
Uninterruptible power supply with distribution of 14V and 5 V DC to the
FCB and FRB
•
Lightning protection
•
Fused mains feed-through to the FHU.
7.1
Power Supply Unit
The FPU includes the following main parts:
•
AC/DC module
•
DC/DC module
•
Battery charge
•
DC alarm supervisor control
•
Lightning protection
•
Connectors
•
Switches
•
LEDs (Status indicators)
•
Fuses.
7.1.1
AC/DC Module
The AC/DC module is an isolated switchmode power supply which supplies the
DC/DC module, the charge control and the radio part with 14V.
7.1.2
DC/DC Module
The DC/DC module is a non-isolated step-down converter that supplies the
logic with 5V.
