Description
Product Description
The Dual-Channel 5V Opto-Isolated Relay Module is a premium, compact switching solution engineered for applications where electrical integrity and signal protection are paramount. This module combines the robust power-handling capability of industrial relays with the critical safety feature of optical isolation, creating a reliable bridge between your sensitive 5V microcontroller and high-power AC/DC loads. Each of its two independent channels is equipped with a dedicated optocoupler, establishing a complete 2500V electrical barrier that blocks harmful voltage spikes, ground loops, and electrical noise from the load side, ensuring your Arduino, Raspberry Pi, or PLC remains safe and operational.
Designed for maximum flexibility, the module features a simple jumper to select between high-level or low-level trigger logic for each channel, making it universally compatible with any digital control system. The inclusion of dual status LEDs per channel—one for opto activation and one for relay state—provides unparalleled diagnostic clarity. With its high-current relay contacts, secure screw terminals, and compact footprint, this module is the ideal choice for projects that require a reliable, protected, and versatile two-channel interface, from sophisticated prototyping to final product integration in noise-sensitive environments.
Key Features
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Dual Optical Isolation: Each channel is protected by an independent optocoupler, providing 2500Vrms of isolation to safeguard your control electronics from high-voltage transients and noisy load circuits.
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Selectable Trigger Logic: A simple jumper allows you to configure each channel for either High-Level (active-HIGH) or Low-Level (active-LOW) trigger, ensuring perfect compatibility with any microcontroller or control logic.
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Two High-Capacity Relay Channels: Features two industrial-grade electromagnetic relays with SPDT contacts, each capable of switching up to 10A loads, suitable for a wide range of AC and DC applications.
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Comprehensive Status Indication: Two LEDs per channel provide clear visual feedback: one indicates the opto-isolator is activated by the input signal, and the other shows the physical state of the relay coil and contacts.
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Integrated Voltage Spike Protection: Each relay coil is fitted with a flyback diode to suppress inductive kickback, protecting the drive transistor and ensuring long-term circuit reliability.
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5V TTL Logic Compatible: Designed for direct, easy interfacing with 5V microcontrollers like Arduino, requiring only a minimal current draw to activate the opto-isolators.
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Secure & Professional Connections: All high-power load connections utilize reliable screw terminals, while control connections are made via a standard pin header for a clean setup.
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Compact & Robust Design: Built with high-quality components on a durable PCB, offering professional performance in a minimal footprint ideal for space-constrained projects.
Main Parameters
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Channels: 2 Independent Relays
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Control Signal Logic: 5V TTL
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Trigger Mode: High or Low Level (Jumper Selectable)
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Isolation Rating: 2500V RMS (Optocoupler)
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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. 80mm x 55mm x 20mm
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