Rs232 4-Channel Relay Module With Opto Isolation, 77X64mm 7901346512680

Rs232 4-Channel Relay Module With Opto Isolation, 77X64mm 7901346512680

RS232 Relay Module Opto 4 Channel Serial Port Control Relay Module with 8 Bit MCU SP3232 Item Type: Relay Module Material: PCB Power Supply Voltage:...

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