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AD-4430B
6.
Interface
6.1.
The Parallel BCD Output
6.1.1.
Timing Chart Of The BCD Output
The strobe signal becomes "1" when starting data transmission and becomes "2" after the
strobe time. The strobe pulse band takes half the time to transmit data.
Data output
Strobe signal
6.1.2.
Terminals Of The BCD Output
BCD Output And I/O Output
I/O Input
Output type
Open Collector
Input type
DC input
Isolation
Photo coupler
Open circuit voltage Approx. 5V
Output current
50mA Max.
Off current
0.1mA Max.
Saturation voltage 0.5V Max. @50mA
On current
2mA Min.
Saturation voltage 2V
Anti - chattering time 10msec.
The circuit of BCD is isolated from the D.C. power
supply and load cell circuit.
Supply D.C. +24 V between BCD PWR+24V
terminal and COM terminal.
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
AD-4430B
Internal circuit
750
Ω
