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10.1 Digital I/O Specifications
The specifications of the digital I/O terminals of the LF232 converter are as follows:
Digital Outputs:
(DO1) Output type Transistor open collector (standard)
Number of outputs 1
Capacity 30 VDC, 200 mA maximum
(DO2 to DO4) Output type Solid-state contact output (non polarity) (option)
Number of outputs 3
Capacity 150 VDC, 150 mA maximum
150 VAC (peal value), 100 mA maximum
Digital Input (option):
(DI1, DI2) Signal type Voltage signal of 20 to 30 VDC
• High input level: 20 to 30 VDC
• Low input level: 2 VDC maximum
Input resistance Approx. 2.7 kΩ
Number of inputs 2
• Each terminal can be set to select each function.
• Terminal “CO2” is the common terminal of DO2 to DO4 and “CI” is the common terminal of DI1
and DI2.
• Each terminal is isolated from internal circuit.
(Output terminals are not isolated between them.)
• In the case of the standard specification (without digital I/O specification), a solid-state contact,
photo-coupler and resistor are not provided internally.
Contact output 2 (DO2 to DO4)
Contact output 1 (DO1)
CI DI1, DI2
DO2 to
DO4
DO1CO2CO1
Photo-coupler (option)
Resistor
(option)
Converter inside
Voltage input
Solid-state contact
(option)
Transistor open collector
(standard)