Ericsson Radio Systems AB PKRC1311004-1 Manual De Usuario
Unit Description, IDM
14
Unit Description, IDM
This chapter describes the internal Distribution Module that distributes
+24 V DC to all DC powered units in the RBS. Distribution circuits are
protected by circuit breakers.
+24 V DC to all DC powered units in the RBS. Distribution circuits are
protected by circuit breakers.
The IDM consists of a unit with 21 circuit breakers, four PSU cables
and connectors to the different DC powered units.
and connectors to the different DC powered units.
14.1
Functions
The IDM has the following functions:
•
Distributes power to all DC powered units.
•
Provides fused power distribution to the DC powered units.
•
Provides a manual connect or disconnect function of all DC
powered units.
powered units.
•
Monitors the system voltage (+24 V DC).
14.2
External Interfaces
P007891B
System volta
ge
test port
DC out
15A
Climate
30A
Fan 1
5A
Fan 3
5A
Fan4
5A
TRU 1
30A
TRU 2
30A
CDU 1
5A
TRU 4
30A
CDU 2
5A
TRU 5
30A
TRU 6
30A
CDU 3
5A
CXU 1-2
DXU 5
5A
DXU/Sys.
Volt.Sens.
5A
OXU 1
5A
OXU 2
5A
OXU 3
5A
OXU 4
5A
TRU 3
30A
Operation
IDM-01
Fan 2
5A
Figure 82
The IDM
The IDM has the following external interfaces:
•
Four PSU cables
•
Battery connection (positive)
•
Battery connection (negative) and earth connection
•
System voltage test port
•
ESD wrist-strap connector
•
Power distribution connectors (see table below)
EN/LZT 720 0008
R1A
2001-06-26
157 (421)
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