Nortel Networks DCT1900 manual Modular Cabinet Powering Restrictions, A r d T y p e + 1 2

Technical Product Manual - DCT1900

Configuration Directions, Limitations of the System

2.2Modular 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.

B o a r d T y p e		5 V	+ 1 2 V	- 1 2 V
C P U - 2 R E X - B R D 9 0 3 3		6 W
	R E X - B R D 9 0 3 4
C P U	R E X - B R D 0 0 0 4	9 . 6 W	1 W	1 W
S P U - S R E X - B R D 0 0 1 7		3 . 5 5 W
S L U	R E X - B R D 0 0 1 5	6 . 9 W
C L U - S R E X - B R D 0 0 1 6		3 . 4 5 W
C L U	R E X - B R D 0 0 1 4	3 . 6 W
D T U - E 1 , C C S / C A S		4 . 5 W
	R E X - B R D 0 0 0 2
D T U - T 1 , C A S		6 W
	R E X - B R D 0 0 2 1
D T U - T 1 C C S		6 W
	R E X - B R D 0 0 2 1
L T U	R E X - B R D 0 0 0 7	1 . 5 W	. 7 5 W	. 7 5 W
L T U - 2	R E X - B R D 0 0 1 9	2 . 5 W
D L U	R E X - B R D 0 0 2 3	6 . 5 W		1 . 2 W
	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

Config-DCT1900/R8/mw	2-3
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