Unipulse F160, Руководство по эксплуатации, Страница: 60 / 99

51
7 OPTION (Setting Code 38)
51
OP
TION
Chapter
7
■
BCD Data Hold
Renewal of the BCD data output signal is stopped. Also the STROBE output is stopped. Switching
is done by A14.When COM and A14 are open: hold cancel, When they are short-circuited: hold on.
BCD data
OFF
ON
BCD data
1 cycle
1 cycle (max)
Renewal is stopped.
0
1
STROBE
hold
Read at least 2 cycles after inputting the BCD data hold.
As long as the BCD Data Hold signal is inputted, data can be read reliably, but because the data is
not renewed, it may be different from proper data.
■
Equivalent Circuit
- Output
The signal output circuit is operated through an open collector.
COM
Vext F160
Inside
Vceo=30V(max)
Ic=30mA(max)
●
Internal transistor status
Output data Negative Positive
0 OFF ON
1 ON OFF
●
Output pin level
Output data Negative Positive
0 H L
1 L H
Through logic switch (B14pin)
Outside
VCC +5V
- Input
COM
+5V
TTL open collector output
(ON when IN is “ H”)
IN
IN
Approx.
Transistor
Open OFF
Short ON
Switch
F160
Inside Outside
Ic=6mA
Vcc