A&D AD-4212A-100 Instruction Manual page 75

OP-01 installation procedure
1 Remove the two screws that secure the I/O unit to
the rear of the display unit.
2 Remove the I/O unit and disconnect the two cable
connectors.
3 Connect the 14-pin cable connector that was
removed in step 2 to the OP-01 connector.
4 Leave the 2-pin cable connector as is.
5 Secure the OP-01 board to the rear of the display
unit using the two screws.
I/O timing chart
Note
The time to start re-zero operation differs, depending on the timing of the re-zero input:
a. To enter re-zero operation without data update
b. To enter re-zero operation after data update
In addition, the time to complete re-zero operation is not constant due to ambient conditions
such as external disturbance or vibration.
Using the status signal, confirm that RE-ZERO input is accepted or re-zero operation is complete.
"BUSY input ON" is the condition that pin 7 is connected to input signal GND (pin 3).
"RE-ZERO input ON" is the condition that pin 9 is connected to input signal GND (pin 3).
T int
T str
T st
"Switch input ON" is the condition that is connected to input signal GND (pin 3).
ON
OFF
Data output interval
Strobe pulse width
Data setup
Data refresh rate
T on
T on, T off : 100 m sec or longer
Approx. 100 msec (Approx. 200 msec when the
data refresh rate is 5 times/second.)
Approx. 70 msec (Approx. 170 msec when the
data refresh rate is 5 times/second.)
10 μsec or less
1 μsec or less
Ｔoff
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OP-01
3
4
5
5