Description
Product Description
The 5V/12V 8-Channel Opto-Isolated Relay Module is a professional, high-density interface board engineered to serve as a universal, protected output stage for a wide range of microcontroller platforms, including AVR (Arduino), 8051, PIC, and ARM. This module is specifically designed to bridge the gap between low-power 5V or 12V logic signals and the high-power real-world devices they need to control, providing eight completely independent and isolated switching channels. Its standout feature is the dual-voltage compatibility, allowing it to be configured for either 5V or 12V logic levels, making it an exceptionally versatile tool for developers, students, and engineers working across different hardware standards.
Each of the eight channels incorporates advanced optocoupler isolation, creating a 2500V electrical barrier that safeguards your sensitive microcontroller from electrical noise, voltage spikes, and ground loops originating from inductive loads like motors, solenoids, or AC mains. The board features a clear pinout and integrated status LEDs, offering immediate visual feedback for each channel. With its high-current relay outputs, configurable logic levels, and robust screw terminals, this module is the ultimate solution for building sophisticated, reliable, and safe multi-channel control systems for home automation, industrial prototypes, and complex educational projects.
Key Features
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Dual-Voltage Compatibility: Jumper-selectable 5V or 12V logic level input, making it universally compatible with popular 5V (Arduino/AVR) and 12V (PLC/Industrial) microcontroller families without modification.
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High-Density 8-Channel Design: Control up to eight completely independent AC or DC loads from a single, compact module, maximizing control capability for complex systems.
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Full Optical Isolation per Channel: Each channel is protected by an independent optocoupler, providing 2500Vrms of isolation to protect your microcontroller from load-side transients and electrical noise.
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Universal Microcontroller Compatibility: Designed with a standard pin header interface that directly connects to the I/O ports of AVR (Arduino), 8051, PIC, and other common microcontrollers.
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High-Current Relay Outputs: Eight industrial-grade electromagnetic relays with SPDT contacts, each capable of switching loads up to 10A, suitable for a vast range of appliances and equipment.
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Comprehensive Status Indicators: Dual LEDs per channel provide clear visual diagnostics: one for opto-isolator input status and one for physical relay activation.
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Secure & Robust Connections: All high-power load connections and DC inputs utilize reliable screw terminals for safe, vibration-resistant wiring in demanding applications.
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Integrated Protection Circuits: Each channel includes flyback diodes and other protective components to ensure long-term reliability and protect both the module and the connected microcontroller.
Main Parameters
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Channels: 8 Independent Relays
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Logic Voltage: 5V or 12V DC (Jumper Selectable)
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Control Interface: Standard 0.1″ pin header for direct MCU connection
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Isolation Rating: 2500V RMS (Optocoupler, per channel)
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Relay Contact Rating: 10A @ 250VAC / 10A @ 30VDC
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Relay Type: Electromagnetic, SPDT (Single Pole Double Throw)
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Input Current (per channel): ~5-10mA (to activate optocoupler)
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Dimensions: Approx. 145mm x 100mm x 25mm
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