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Power Switches (in Control Panel CT-25I)
The AC porrer to operate the computer is controlled
by the POI^|ER
switches on the Control Panel CT-25L. \nlhen the AC cord is con-
nected from an erbernal
AC source to the Power Si:pp1y, the 0F!'
switch will
light
and notify
the operator that AC power is ready,
the Oven in the computing console is working and Pre-Patch Panel
driving
mechanism is ready to actuate.
When 0N switch is pushed, the Power Supply PS-051 will
furnish
al-l the DC, AC and square-riiave power necessary to operate the whole
n n m n r r t o n
POTEIüI IO}'ETERS
One of the simplest and most useful operations perforrned on an analog
Corlff'trfr
?ä.eTo.a
computer is the multiplication
of a variable
voltage by a.*ignal.
The
Hitachi
505 has a basic complement 18 potentiometers and may be expanded
to a full
complement of 54 potentiometers.
Each Potentiometer Panel H-Z5t
provides 18 potentiometers for
ser-
ting
problem coefficients,
initial
conditions,
and problem inputs.
The
potentiometers
are mounted to a maxjmum of 3 horj_zontal rows of 1g poten_
tiometers per row.
Each row is terrninated at a corresponding row of the
?re-Patch Panel; three modules pr-]51 of a row in the pre-patch panel
tertninate
a Potentiometer
Panel W-25I.
Each potentiometer
patch Module
IT-151 contai-ns 6 potentiometer terrninals.
Five of the six poteniometers
have one end grounded while the sixbh has both ends ungrormded.
(see
Figure 2./+-L)
The standard potentiometers
in the 5a5 are 10 turn,
wirewoi:rrd, 3oK
ohms, individuallv
fused units with cal-ibrated dials
and a lockinE
mectranism.
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