1/3/4 Channel 12V220V 1-Bit TLP281 PLC Optocoupler isolation Module Detect Board

PC817 2/4/8 Channel Optocoupler Isolation Board Voltage Converter Adaptor Module

3x TLP281 Optocoupler Isolation Board Optical Coupler Module 4 Channel Expansion

1Channel Optocoupler Isolation Module Photoelectric Isolator Signal 3-5V/12V/24V

TLP281 4-Channel Opto-isolator IC Module High &Low level Expansion Board

2-way/4/8-way Voltage Isolation Board PC817 Optocoupler Control Transfer Module

TLP281 4-way Optocoupler Isolation Module High and Low Level Expansion Board

1/3 Channel Bit Optocoupler Isolation Module Board Adaptive For PLC AC 220V