User Manual
Table Of Contents
- Contents
- 1 Introduction
- 2 Product Safety Requirements RBS 2000
- 3 Environmental Capabilities
- 3.1 Scope
- 3.2 Terminology
- 3.3 References
- 3.4 Transport -40 C – +70 C
- 3.5 Storage -25 C – +55 C
- 3.6 Handling -40 C – +70 C
- 3.7 Operation Indoor +5 C – +40 C
- 3.8 Operation Outdoor -33 C – +40 C
- 3.9 Operation Outdoor -33 C – +45 C
- 3.10 Operation Outdoor -33 C – +55 C
- 3.11 Operation Mast-Mounted Equipment -33 C – +45 C
- 3.12 Operation Mast-Mounted Equipment -40 C – +55 C
- 4 Climate Protection
- 5 EMC Capabilities
- RBS 2101, Product Description
- RBS 2102, Product Description
- RBS 2103, Product Description
- RBS 2202, Product Description
- RBS 2101, 2102, 2103 & 2202 Radio Configurations
- RBS 2202 Antenna Configurations
- ACCU Description
- BFU Description
- CDU-A Description
- CDU-C Description
- CDU-C+ Description
- CDU-D Description
- DXU Description
- DXU-21 Description
- ECU Description
- PSU -48 V Description
- PSU 230 V Description
- sTRU Single Transceiver Unit Description
- V3 Climate Unit Description
- Glossary
PSU -48 VPower Supply Unit
4 Function Description
The PSU -48 V has the following functions:
• Communication
• Handling alarms
• Load sharing
• Output overvoltage protection
• Power limitation
The figure below shows a block diagram of the PSU -48 V.
Voltage Control Device
DC/DC
Converter
Output
Filter
Input
Filter
+24V
DC
P003317A
Primary control
device
Secondary control
device
Alarms
+
control
PSU-48
-48V- -60V DC
Figure 1 Block Diagram
4.1 Communication
The PSU communicates with its superior unit (ECU) through an optical
interface. The PSU is controlled and supervised through this communication.
In the event of communication failure, the PSU continues working with the
values last received.
4.2 Handling Alarms
The following alarms are detected in the converter and are then forwarded to
the ECU and to an LED on the PSU front:
4 (10)
EN/LZT 720 0281 Uen R1A