Digital I/O Specifications - Toshiba LF620 B Series Instruction Manual

10.1 Digital I/O Specifications

The specifications of the digital I/O terminals for the converter for electromagnetic flowmeter: LF62**B are
as follows:
 Digital Output 1(DO1 )
 Digital Output 2(DO2 )
 Digital Input (DI )
•
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.)
•
In standard specification (without digital I/O), semiconductor contact, photo coupler, and resistor
are not built in. Left DO2 and DI unconnected.
Photo coupler
Output type: Transistor open collector
Number of outputs: 1
Capacity: 30 V dc, 200 mA maximum
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
Input signal: 20 to 30 V dc voltage signal
•
•
Approximately 10 kΩ
Input resistance:
Number of inputs: One point
Solidstate relay
COM
DI
Voltage input (DI)
Contact output 2 (DO2)
Contact output 1 (DO1)
High input level—20 to 30 V dc
Low input level—2 V dc maximum
DO2 DO1
－ 117 －
6 F 8 A 0 9 9 7
Transistor open collector
Resistor
Flowmeter