Gymna Pulson 330, Руководство по обслуживанию

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10.4 Relay 4 (RLY4).
After the instrument has been switched on , or the 1/3 MHz-key has
been pressed, the
µ
p checks the head sizes of all heads connected.
RLY4 closes the HEAD_SIZE line, and reads the size of all heads
connected to the apparatus.
After reading, RLY4 opens again. This is done in order to obtain a
galvanic separation of
the outputs in case of combination therapy.
10.5 Microprocessor ( µ p) pin description.
•
USD_UP_KEY Input signal. Switches to logic low level when
the ultrasonic
density up key is pressed.
•
USD_DOWN_KEY Input signal. Switches to logic low level when
the ultrasonic density down key is pressed.
•
SELECT_LEFT_KEY Input signal. Switches to logic low level when
the left
output mode key is pressed.
•
SELECT_RIGHT_KEY Input signal. Switches to logic low level when
the right
output mode key is pressed.
•
N.U. Not used.
•
FREQ_ 1_3_MHZ_KEY Input signal. Switches to logic low level when
the 1/3 MHz. key is pressed.
•
TIME_DOWN_KEY Input signal. Switches to logic low level when
the time down key is pressed.
•
TIME_UP_KEY Input signal. Switches to logic low level when
the time
µ
p key is pressed.
•
WATCH_DOG Output signal. In case of
µ
p hang up, this
signal is at logic high level.
•
KEY_SELECT Output signal. Logic low enables hardware
information to
be read in the
µ
p. Logic high level disables
hardware
information and connects the keyboard to the
µ
p.
•
VUS_EN US voltage enable. Low/high active. Disables
output stage
in case of
µ
p hang up.
•
SCK Serial clock. Clock signal for I•C- bus.
•
SDA Serial data. Data signal for I•C- bus.
•
SCK_ADDA Clock signal for I•C -bus, connected only to U15
(ADDA)
•
SDA_ADDA Data signal for I•C-bus, connected only to
U15(ADDA)
•
HEAD_SIZE Input signal. This line is read during
initialising, to let the
µ
p
know the head sizes of the heads connected.
•
SERVICE_REQUEST High active. When a jumper is placed on CON1 ,
this line
switches to logic high level and the service
routine is activated.
•
ON/OFF Output signal: When this signal is at logic high
level, the
1/3 MHz signals are cut off, which results in 0
W output. This signal will switch on/off at 100 Hz in
case of combination therapy.
•
1/3 MHZ Output signal. When this signal is at logic high
level, the
3 MHz base frequency is selected.
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