Specifications

1-8 Reference Guide
Model No.
Running Head
Chassis Types System Overview
Figure 1-6. External Power Source for the Power Enhanced Chassis
AC
C1 C2 P1 P2 P3 W1W2W3W4 IFU1U2 U3U4U5U6 U7U8
1
2
3
E
U
R
/
U
S
JP1
R1 R2 R3 R4 R5 F 1 F2
RGR -
-V
NA
+V
NA
-V
NB
+V
NB
-V
A
+V
A
-V
B
+V
B
COM -
GND -
RGR -
-V
NA
+V
NA
-V
NB
+V
NB
-V
A
+V
A
-V
B
+V
B
COM -
GND -
1. V
NA
(+ & -) and V
NB
(+ & -) are dual -48VDC feeds for the data backplane when
-48VDC is to be output from the user card. V
NA
and V
NB
are independently
protected by 8 amp fuses located on the front panel above the TB connector.
2. V
A
(+ & -) and V
B
(+ & -) are dual feeds for the power supplies located in slots
F1 & F2 respectively (see note 3).
3. Power to V
NA
(+ & -) and V
NB
(+ & -) must be supplied or jumpered from
either V
A
(+ & -) and V
B
(+ & -) if -48VDC power is required on the data backplane.