BESTEP 1-way electromagnetic relay module with dual optocoupler isolation supports high and low trigger 12V

Description

Product Overview

The BESTEP 1-Way Electromagnetic Relay Module is a high-performance, industrial-grade control module designed to provide a safe and reliable interface between low-voltage logic circuits and high-power devices. Operating at 12V DC, this module is ideal for automotive applications, PLC systems, industrial control panels, and 12V battery-powered projects .

Featuring dual optocoupler isolation, this module creates a robust physical and electrical barrier between your sensitive microcontroller (such as Arduino, STM32, or ESP32) and the high-voltage load side. This effectively eliminates electrical noise, protects against back-EMF spikes from motors and solenoids, and ensures system stability in demanding industrial environments .

This versatile module supports both High-Level and Low-Level Trigger modes, selectable via an onboard jumper, making it compatible with virtually any digital logic system without the need for external level shifters. With a relay contact rating of 10A at 250V AC or 10A at 30V DC, it can handle a wide range of loads, from LED lighting and fans to motors, pumps, and industrial machinery .

Key Features

• Dual Optocoupler Isolation: Features two optocouplers (typically PC817) providing enhanced electrical isolation between the control side and the high-voltage load side, ensuring superior noise immunity and protection against voltage spikes .

• 12V DC Operation: Designed for 12V control systems, making it ideal for automotive electronics, PLC automation, and industrial controllers .

• Universal Trigger Modes: Supports both High Level (Active HIGH) and Low Level (Active LOW) trigger modes, selectable via an onboard jumper, allowing compatibility with any microcontroller or logic system .

• High Power Switching: Relay contacts rated for 10A at 250V AC or 10A at 30V DC, suitable for controlling lights, fans, motors, solenoids, pumps, and industrial equipment .

• SPDT Contact Configuration: Provides Common (COM), Normally Open (NO), and Normally Closed (NC) terminals for maximum wiring flexibility—use NO for OFF-by-default operation or NC for ON-by-default operation .

• Clear Status Indicators: Onboard LEDs provide visual feedback: a green power LED illuminates when 12V power is applied, and a red relay status LED illuminates when the relay is activated .

• Standard Interface: Equipped with screw terminals for the high-voltage side and a 3-pin header (DC+, DC-, IN) for the control side, facilitating easy integration .

• Fault-Tolerant Design: Even if the control line is disconnected or broken, the relay will not operate unintentionally, ensuring fail-safe behavior .

• Compact and Durable: Small form factor with mounting holes for secure installation in control cabinets, enclosures, or on DIN rails .

Technical Specifications