Filter
Top Products
Technical Product Manual - DCT1900
Configuration Directions, Limitations of the System
Config-DCT1900/R8/mw 2-3
© 2000-2005
2.2 Modular Cabinet Powering Restrictions
Although the Modular Cabinet has space for 9 boards, not all board combinations are allowed due
to power limitations of the DC/DC converter on the backplane. This converter is specified as
follows:
+5 V can supply 40 W at maximum
+12 V can supply 12 W at maximum
-12 V can supply 12 W at maximum
total must be
<40 W
Table 2–1 shows the power consumption per board type. From this table, it can be calculated if a
configuration matches the power requirements. The values given to the ±12V of the LTU indicates
the power consumption in the case where all LTU circuits are off hooks.
Note:
Due to a minimum required power consumption from the DC/DC converter, at least two boards
must be present in each cabinet.
Table 2–1 Power Consumption per Board
Board Type 5 V
+
12 V
-
12 V
CPU-2 REX-BRD9033
REX-BRD9034
6 W
CPU REX-BRD0004 9.6 W 1 W 1 W
SPU-S REX-BRD0017 3.55 W
SLU REX-BRD0015 6.9 W
CLU-S REX-BRD0016 3.45 W
CLU REX-BRD0014 3.6 W
DTU-E1,CCS/CAS
REX-BRD0002
4.5 W
DTU-T1,CAS
REX-BRD0021
6 W
DTU- T1 CCS
REX-BRD0021
6 W
LTU REX-BRD0007 1.5 W .75 W .75 W
LTU-2 REX-BRD0019 2.5 W
DLU REX-BRD0023
AWS1024
AWS1025
AWS1026
6.5 W 1.2 W