Nortel Networks DCT1900 - Manual (Page 258)

Technical Product Manual - DCT1900
Installation Instructions, Modular Cabinet – Power Cabling
19-8 Install-DCT1900/R8/mw
© 2000-2005
19.4 Modular Cabinet - REX-BAS9021A/1B
Figure 19–9 shows the power distribution in a Modular Cabinet powered by external -48Vdc
supplies.
Fig. 19-9 Power Distribution Powered by External -48Vdc
Mains
filter
+ 5 V
+ 12 V
* 12 V To
System
Boards
BACKPLANE
To
CLUs
PW1
PW2
PW3
PW4
PW5
PW6
PW3
MCCB
MODULAR
CABINET
TSRNB
101 33
X112, X113
PW-EXT
TRENB
101 03
PW-BP
TRENB
101 05
or
X102
Piggy-back
FASTON
Terminal
Block A
(see Figure 16-2)
15 A
15 A
15 A
48 Vdc
PW1
PW2
PW7
F1
F2
External 48 Vdc
Terminal
Block B (see
Figure 16-2)
Power Supplies
3A
T ERMINAL B LOCK B
(S EE F IG . 19-10)
T ERMINAL B LOCK A
(S EE F IG . 19-10)
External -48Vdc
External -48Vdc
Piggy-back
Faston