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107
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6 F 8 A 0 9 3 4
10.1 Digital I/O Specifications
The specifications of the digital I/O terminals for the converter for electromagnetic flowmeter: LF546 are
as follows:
Digital Output 1(DO1 )
Output type:
Transistor open collector
Number of outputs:
1
Capacity:
30 V dc, 200 mA maximum
Digital Output 2(DO2 )
Output type:
Solidstate relay (non polarity)
Number of outputs:
1
Capacity:
150 V dc, 150 mA maximum
150 V ac(peal-to-peak), 100 mA maximum
Digital Input (DI )
Input signal:
20 to 30 V dc voltage signal
•
High input level—20 to 30 V dc
•
Low input level—2 V dc maximum
Input resistance:
Approximately 2.7 k
Ω
Number of inputs:
One point
•
Each I/O terminal
can be used as a specified function terminal
when selected.
•
Terminal
COM
is the signal
COMMON
for the other three terminals (
DO1
,
DO2
and
DI
).
•
Each terminal is
isolated from the internal circuits
.
(The output terminals are not isolated from each other.)
Flowmeter
Solidstate relay
Transistor open collector
(Standard)
Voltage input (DI)
Contact output 2 (DO2)
Contact output 1 (DO1)
Resistor
Photo coupler
COM
DI
DO2
DO1