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B78 4-CH Optocoupler Isolation Module
Function: use low level to control high level£¬ for example£¬ 3V or 5V voltage control 9V or 12V voltage HVCC max. 24V£¬ output port OUT1 / OUT2/ OUT3 / OUT4 output max. current equal to HVCC / 5.1K£¬ Max. absorption current 500mA This module adopt Toshiba TLP281 chip Input / output instruction: Input port: IN1 / IN2 / IN3 / IN4£¬ connect microcontroller or Arduino IO port£¬ GND and microcontroller or Arduino development board GND connection; IN1 / IN2 / IN3 / IN4 separately controlled OUT1 / OUT2 / OUT3 / OUT4 Output port: OUT1 / OUT2 / OUT3 / OUT4 Output end: HVCC: connect high voltage positive being controlled£¬ HGND connect high voltage negtive being controlled. Operation: When IN1 is high level£¬ corresponding OUT1 voltage equal to HVCC£¬ when IN1 is low level£¬ OUT1 voltage equal to HGND.