Modular Cabinet Powering Restrictions - Nortel DCT1900 Technical Product Manual

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
+12 V
-12 V
total
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.
Config-DCT1900/R8/mw
© 2000-2005
can supply 40 W at maximum
can supply 12 W at maximum
can supply 12 W at maximum
<
must be 40 W
B o a r d T y p e
C P U - 2 R E X - B R D 9 0 3 3
R E X - B R D 9 0 3 4
C P U R E X - B R D 0 0 0 4
S P U - S R E X - B R D 0 0 1 7
S L U R E X - B R D 0 0 1 5
C L U - S R E X - B R D 0 0 1 6
C L U R E X - B R D 0 0 1 4
D T U - E 1 , C C S / C A S
R E X - B R D 0 0 0 2
D T U - T 1 , C A S
R E X - B R D 0 0 2 1
D T U - T 1 C C S
R E X - B R D 0 0 2 1
L T U R E X - B R D 0 0 0 7
L T U - 2 R E X - B R D 0 0 1 9
D L U R E X - B R D 0 0 2 3
A W S 1 0 2 4
A W S 1 0 2 5
A W S 1 0 2 6
Table 2–1 Power Consumption per Board
Technical Product Manual - DCT1900
Configuration Directions, Limitations of the System
5 V + 1 2 V
6 W
9 . 6 W 1 W
3 . 5 5 W
6 . 9 W
3 . 4 5 W
3 . 6 W
4 . 5 W
6 W
6 W
1 . 5 W . 7 5 W
2 . 5 W
6 . 5 W
- 1 2 V
1 W
. 7 5 W
1 . 2 W
2-3