Description
Product Description
The 4 Channel 12V Relay Module with Optocoupler is a professional-grade interface designed to deliver reliable, isolated control for 12V-based automation and industrial systems. This module provides a robust and secure bridge between 12V logic signals from controllers, PLCs, or automotive systems and a variety of high-power AC or DC loads. Its defining feature is the integration of advanced optocouplers on all four channels, creating a critical 2500V electrical isolation barrier that completely separates sensitive control electronics from potentially noisy, high-voltage load circuits. This protection ensures immunity from damaging voltage spikes, ground loops, and electromagnetic interference, guaranteeing the stability and longevity of your control equipment.
Engineered for maximum versatility, the module features individually selectable high-level or low-level trigger logic for each channel via simple jumpers, offering seamless compatibility with any 12V control signal type. Combining four high-current relay outputs, clear per-channel status indicators, and secure screw terminal connections, this module is the ideal solution for building reliable multi-circuit control systems, industrial machine interfaces, and complex automation projects where safety, signal integrity, and flexible integration are essential.
Key Features
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Quad-Channel Opto-Isolation: All four independent channels are protected by individual optocouplers, providing 2500Vrms of isolation to shield your 12V controller from hazardous load-side transients and electrical noise.
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Dual Trigger Logic Selectable: Each channel can be individually configured for High-Level (active on +12V) or Low-Level (active on 0V/GND) trigger via a jumper, ensuring compatibility with all 12V sourcing (PNP) or sinking (NPN) control outputs.
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Industrial 12V DC Compatibility: Designed for direct integration into standard 12V industrial, automotive, and control system environments without requiring additional logic level conversion.
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High-Power Relay Outputs: Features four robust electromagnetic relays with SPDT contacts, each capable of switching loads up to 10A at 250VAC or 30VDC for versatile application use.
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Clear Operational Feedback: Dual LEDs per channel provide immediate visual diagnostics: one indicates opto-isolator input status, and the other confirms physical relay activation and contact closure.
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Secure & Robust Connections: All high-current load and DC power inputs utilize reliable screw terminals, ensuring safe and vibration-resistant wiring suitable for demanding installations.
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Integrated Flyback Protection: Each relay coil includes a protection diode to suppress inductive voltage spikes when de-energized, safeguarding the driving circuitry and enhancing overall reliability.
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Compact & Efficient Design: Optimized PCB layout provides four fully isolated relay channels in a compact, easy-to-install form factor for space-conscious control panels and enclosures.
Main Parameters
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Channels: 4 Independent Relays
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Control & Logic Voltage: 12V DC
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Trigger Mode: High or Low Level (Jumper Selectable per channel)
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Isolation Voltage: 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. 120mm x 75mm x 22mm
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