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    $7.99
    NOYITO 4-Channel Optocoupler Photoelectric Isolator Module Level Voltage Converter Module PLC Signal Converter Module PNP NPN To PNP (12V To 3.3V)
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    45
    $7.99
    NOYITO 4-Channel Optocoupler Photoelectric Isolator Module Level Voltage Converter Module PLC Signal Converter Module PNP NPN To PNP (12V To 3.3V)
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    45
    $2.50
    Expansion Board TLP281 4-Channel 4 CH Opto-Isolator IC Module For Expansion Board High And Low Level Optocoupler Isolation
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    $2.50
    Expansion Board TLP281 4-Channel 4 CH Opto-Isolator IC Module For Expansion Board High And Low Level Optocoupler Isolation
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    $5.74
    Comimark 2Pcs Tlp281 4-Channel Opto-Isolator Ic Module For Expansion Board C4K2
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    4
    $5.74
    Comimark 2Pcs Tlp281 4-Channel Opto-Isolator Ic Module For Expansion Board C4K2
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    4
    $9.99
    Alinan 4Pcs 4CH Optocoupler PC817 4 Channel Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolated Module
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    5
    $9.99
    Alinan 4Pcs 4CH Optocoupler PC817 4 Channel Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolated Module
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    5
    $9.99
    ACEIRMC 4Pcs 4CH Optocoupler PC817 4 Channel Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolated Module (4CH
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    12
    $9.99
    ACEIRMC 4Pcs 4CH Optocoupler PC817 4 Channel Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolated Module (4CH
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    12
    $7.99
    NOYITO TLP281 4-Channel Optocoupler Isolation Board For High And Low Level Optocoupler Isolation Expansion Board (Pack Of 5)
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    1
    $7.99
    NOYITO TLP281 4-Channel Optocoupler Isolation Board For High And Low Level Optocoupler Isolation Expansion Board (Pack Of 5)
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    1
    $16.99
    4 Channel 12V Relay Module With Optocoupler High Or Low Level Trigger Expansion Board(2PCS) (4 Channel 12V Relay, 4 Channel 12V Relay)
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    79
    $16.99
    4 Channel 12V Relay Module With Optocoupler High Or Low Level Trigger Expansion Board(2PCS) (4 Channel 12V Relay, 4 Channel 12V Relay)
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    79
    $15.09
    4 Channel Relay Module DC 12V 30A Relay Module With Optocoupler Isolation
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    $15.09
    4 Channel Relay Module DC 12V 30A Relay Module With Optocoupler Isolation
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    $9.99
    AOICRIE 4Pcs PC817 4 Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolated Module 817 Voltage
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    2
    $9.99
    AOICRIE 4Pcs PC817 4 Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolated Module 817 Voltage
    Amazon.com
    2