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MODEL 64000
SYSTEM OVERVI EW MANUAL
Power Supply Loading
There is a limit to the number and types of option boards that may be installed in the card
cage with the
300-v,/att
power supply. The limit is determined by the amount of available
current from the power suppiies. Tabie
2-5
is an example at power supply loading using the
values given in table 2-6.
Table 2-6 gives the current requirements.
Table
2-5.
Power Supply Available Currents
Power Supply
+12 Vdc
+5 Vdc
(-5.2 Vdc) + (-3 Vdc)
Available Current
6.0 A
20.0 A
10 A
CARD CAGE
Analysis Board
3.0
6800 Emulation System
6.5
PROM Programmer System
1.3
Minicartridge Control
0.3
(tape drive system)
Memory
Control
1.0
16K addressed
3.6
16K
1.9
- -
17.6A
When the listed options are placed in the Model 64100A it totals 17.6 amperes. This leaves
2.4A available for use by an option board. Do not add any option board that exceeds 2.4
amperes.
Each time the option cards are reconfigured, totai ioading of the cards must be recaicuiated
to ensure that power supply limits are not exceeded.
2-47
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