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4 Channel Relay Module for Modbus RTU Automatic Adjustment Switching Circuit Optocoupler RS485 Interface Baud Rate 4800 9600 19200

[Precise Control] The relay module switch allows for a precise step change in the controlled variable when the input quantity meets a specific requirement, ensuring accurate control. [Practical Automatic Switch] Boasting an interactive relationship between input and output circuits, this relay module is practical for controlling large currents with high reliability. [Versatile Application] With rtu protocol support, this relay module can detect 4 channel input signals, channel relay output, and is suitable for various digital quantity or power control scenarios. [Enhanced Relay Experience] The relay module features 4 channel functionality with an optocoupler for increased safety and efficiency, ideal for various automatic control circuits. [Safety Guard] The 4 channel relay module offers automatic adjustment and switching circuit, providing for your equipment.