Reference Guide
IMACS System Release 5.1.9
1-7
System Overview
Chassis Types
1.2.3
Front-Loading 891930 Chassis with Enhanced Power Supply
Figure 1-4 shows the front-loading chassis that uses the 8908 enhanced power converter. This
is a tall chassis in which the two power supply slots (P1/P2) are in the upper right.
This chassis is designed for table top, wall or rack mounting. All cable and card access is from
the front of the chassis.
Slots P1 to P3 will hold three server cards. Slots W1 to W4 hold four WAN cards. Slots U1
through U8 will hold eight user cards.
Slots P1 and P2 hold up to two power supply models 8901 or 8902. Slots R1 and R2 hold up
to a maximum of two ring generators model 890620.
Slots NS1 and NS2 are the two low power slots for the AC-to-DC converters models 8903 and
8905. Slots HP1 and HP2 are for the two high power AC-to-DC converters model 8908.
Note:
The High Power AC-to-DC convertor, 8908, has been discontinued.
Figure 1-4. Power Enhanced Chassis (891930)
RGR1
NS1
RGR2
P1
P2
NS2
C1
C2
P1
P2
P3
W1
W2
W3
W4
IF
U1
C1
C2
P1
P2
P3
W1
W2
W3
W4
IF
U1
U2
U3
U4
U5
U6
U7
U8
U2
U3
U4
U5
U6
U7
U8
HP1
NS1
R1
HP2
NS2
R2
P1
P2
CAUTION: For continued protection
against fire, replace fuses only
with the same type and rating.
Fuse 8A
Time Delay
RGR
COM
V
NA
+
-
V
NB
+
-
V
A
+
-
V
B
+
-
U
L
®
®
Premisys Communications
Model: IMACS/900
105-240V
~
6A 50/60 Hz
LISTED 9K09
LR 77063
Telephone Equipment
