16-Channel 12V Relay Module Optocoupler Isolation for Arduino ESP32

Key Highlights

• ✓High Load Capacity: 12V relay with AC contact capacity of 10A at 250V and DC contact capacity of 10A at 30V, making it suitable for controlling various appliances and electrical equipment. Optocoupler Protection: Equipped with optocoupler isolation for strong anti-jamming ability, ensuring stable performance and protecting the microcontroller from high-voltage spikes. Onboard Power Supply: The module includes an onboard DC 5V power supply, so no external power supply is needed. It simplifies integration into your project. I/O Port Driver: The I/O port driver is active low, meaning the relay is triggered when the input signal is low. Multiple Applications: Ideal for use in microcontroller development boards, appliance control systems, and as PLC extended output. Independently Controlled Relays: Each relay's COM terminal is independent, allowing user-friendly access to different signals. Each relay has normally closed and normally open contacts for flexible control. Motion Indicator Lights: Motion indicator lights are provided for each relay, offering visual feedback of relay operation. Convenient Connections: All interfaces can be directly connected through terminal blocks, which simplifies wiring and setup. Temperature Consideration: The LM2596S step-down chip is used to reduce the power supply voltage, which may generate slight heat. Similarly, the relay itself may also heat up under prolonged use, which is normal. Load Margin: Ensure the relay load has a certain margin to avoid exceeding the relay's rated current capacity. High power loads (about 2000W) can impact the product's lifespan if used for extended periods.