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The IIC Relay Module is a high-performance, optocoupler-isolated relay driver designed for applications requiring the control of multiple relays with fewer than 10 ports. This module is ideal for projects that need stable and reliable relay control. Key Features: - Stable Performance: The module uses an IIC communication optocoupler isolation scheme to ensure stable and reliable operation. - Expandable Addresses: With three address control bits (A2, A1, A0), you can expand up to 8 IIC addresses, allowing you to control up to 32 relays with just two IO ports using a 4-channel module or up to 128 relays with a 16-channel module. - High Load Capacity: Each relay can handle a maximum current of 10A (resistive load) or 7A (inductive load). - Flexible Power Supply: The signal terminal can be driven by 3.3V, and the relay can be powered separately by an external 5V supply. - Easy to Use: Equipped with KF301-5.08 (relay) and PH2.0-4P (signal) interfaces, and includes a PH2.0-4P to DuPont wire for easy connection. Technical Specifications: - Module Type: 1/2/4 relay control - Input Voltage: DC-5V - Control Voltage: 0-220V - Working Current: 100mA per piece - Load Current: 10A (resistive load) / 7A (inductive load) - Interface: KF301-5.08 (relay), PH2.0-4P (signal) Pin Definitions: - VIN: Positive pole of signal power supply (3-5V) - 5V: Relay power supply positive pole (5V) - GND: Input/output negative pole (shared) - SCL: IIC clock line (high level consistent with VIN voltage) - SDA: IIC data line (high level consistent with VIN voltage) - NC: Normally closed end of the relay - COM: Common terminal of the relay - NO: Normally open end of the relay - J1 Jumper: Short circuit the signal power supply to the relay power supply; remove the jumper cap to disconnect the signal power supply from the relay power supply.
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