
AD-4430B - 35 -
6. Interface
6.1. The Parallel BCD Output
6.1.1. Timing Chart Of The BCD Output
The strobe signal, will be turned on when starting data transmission, will be turned off after
the strobe time. The strobe time is a half of a period to transmit data.
Data output
Strobe signal
6.1.2. Terminals Of The BCD Output
BCD Output And I/O Output
Output type Open Collector
Isolation Photo coupler
Output current 50mA max.
Saturation voltage 0.5V max. @50mA
I/O Input
Input type DC input
Open circuit voltage Approx. 5V
Off current 0.1mA max.
On current 2mA min.
Saturation voltage 2V
Anti - chattering time 10msec.
6.1.3. The State Of The BCD Output
Over Flow
The whole bits of the weighing data (1x10
0
to
8x10
4
) are set to "1". Negative sign and
status bits are according to the situation.
Except Weighing Mode
The whole bits of the weighing data (1x10
0
to
8x10
4
) are set to "1". Over bit is set to "1".
Other bits are set to "0". The strobe signal is
not output. A strobe signal is output once
when moving the mode from weighing mode
with stream mode.
1/2 Cycle 1/2 Cycle
1/2 Cycle
1
0
+30V max.
Output terminal
COM (Common)
Input terminal
+5V
Inside of the module
750
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