76
Programme unit
3
Display card A2
The display card communicates with the CPU card through a serial
interface. The CPU card informs what should be displayed in the
display window and the display card converts these messages to
information that controls the alphanumeric display window.
The display card also detects which buttons are pressed on the con-
trol panel and sends these signals to the CPU card.
Card switch Function
X1
Not used
X2
Communication with card reader
for memory cards
X
Not used
X4
Not used
X5
Connection from front key board
X6: 1-2
Voltage supply from CPU card
X6: -7
Serial communication with CPU card
X
X2
X1
X6
Flat cable for keypad
Connection block for
display window
Adjusting of display contrast
X5
42
3
Summary of Contents for W4400H
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