AT&T 3B2/300 Technical Reference Manual page 156

EQUIPMENT D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - - -
CM 194B, 3B2/400 Computer Backplane Board
The CMl 94B is a 12-slot backplane board. The backplane board plugs into the 100-pin (A or J02)
and 60-pin (B or J03) 1/0 expansion connectors on the system board. A maximum of either 6
double-wide or 12 single-width feature cards can be plugged into this backplane. Figure 2-38 shows
the component layout of the CMl 94B Backplane. The board is a multilayer board measuring 5.5 inches
high and 13.8 inches wide. Card and connector pinout information is provided in Appendix B.
r··················································
13.8" .•••••••••••••••••••••••••..••••..••..••••••••.••• ,
n
r--=-02:--
1
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-.:-::-86:-----:::::-============~----,
CONNECTOR 12
01
' - - - - - - - - - - - - - . . J
85
02
CONNECTOR 11
86
01
85
5.5"
02 ..
I ____
c;;;.;o_N_N_E_c_To_R_1_0 _ _ _ __, 86
01 85
0 2
._I
----'c'""o_N_N_Ec .... T_o_R_o_8 _ _ _ __, 86
01 85
02
i
CONNECTOR 06 86
01 85
021 CONNECTOR 04 86
0 1 = = = = 8 5
021 CONNECTOR 02
I
86
01 85
60
B
02
JOO
BUS TERMINATING RESISTORS (8)
02
01
02
01
02
01
02
01
02
01
A. Front View
I
001
A
B. Rear View
Figure 2-38: CMl 94B Backplane Board Layout
2-132 TECHNICAL REFERENCE MANUAL
CONNECTOR 09
86
85
CONNECTOR 07
86
85
CLl~~ECIO~ IJ~
86
85
CONNECTOR 03
86
85
CONNECTOR 01
12
01
A
002
+12V, +5V, AND GROUND
POWER CONNECTOR
I
01
B