1-Channel Optocoupler Isolated Relay Module - 10A High/Low Level Trigger (5V / 12V / 24V) - Image 1

1-Channel Optocoupler Isolated Relay Module - 10A High/Low Level Trigger (5V / 12V / 24V) - Image 2

1-Channel Optocoupler Isolated Relay Module – 10A High/Low Level Trigger (5V / 12V / 24V)

₨250.00

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Overview

High-quality 1-Channel Optocoupler Isolated Relay Module (10A) designed for safe and reliable switching of high-power AC/DC loads using microcontrollers (Arduino, ESP32, STM32, or PLC). Featuring selectable High/Low level trigger modes via on-board jumper settings, it ensures flexible control configuration. The integrated optocoupler provides full optical isolation to protect sensitive control circuits from voltage spikes and electromagnetic interference. Available in 5V, 12V, and 24V DC operating voltage variants.

Key Features:

Selectable High/Low Level Trigger: Easy jumper selection allows switching between High-Level ( $V_{CC}$ ) and Low-Level ( $\text{GND}$ ) signal triggering.
Complete Optocoupler Isolation: Built-in optocoupler isolates control logic from high-voltage load switching to prevent electrical noise and feedback spikes.
High Load Capacity: Heavy-duty relay handles loads up to 10A 250V AC / 10A 30V DC.
Visual LED Indicators: Red power LED ( $\text{PWR}$ ) and green relay activation LED ( $\text{LED1}$ ) provide real-time status feedback.
Three Voltage Variants: Available in 5V, 12V, and 24V DC versions to match different system power requirements.

Detailed Description

1-Channel Optocoupler Isolated Relay Module 10A (5V / 12V / 24V)

This versatile 1-Channel Relay Module is an essential interface board for controlling high-power electrical appliances, industrial machinery, and automation loads directly from low-voltage microcontrollers (Arduino, ESP32, Raspberry Pi, STM32) or industrial controllers (PLCs). Equipped with optocoupler isolation and a user-selectable High/Low level trigger jumper, it delivers maximum protection for your control circuitry alongside exceptional signal compatibility.

Available in 5V, 12V, and 24V DC coil voltage variants, this module features a genuine Songle relay capable of switching loads up to 10A at 250V AC or 30V DC.

Key Features & Technical Highlights

Optocoupler Optical Isolation: Uses an onboard SMD optocoupler to completely isolate low-voltage control signals from high-voltage AC/DC output loads, shielding microcontrollers from inductive voltage spikes and electrical noise.
Selectable High/Low Level Trigger: Includes an onboard 3-pin jumper (COM – HIGH / LOW) allowing seamless switching between High-Level ( $V_{CC}$ ) and Low-Level ( $\text{GND}$ ) signal triggering.
Dual LED Indicators:
- Red Power LED (PWR): Indicates board power supply status.
- Green Relay LED (LED1): Illuminates when the relay coil energizes and the contacts switch.
Fault-Tolerant Circuitry: Features a pull-down resistor circuit ensuring the relay remains un-triggered even if the signal line is left floating or broken.
Standard Screw Terminals: Equipped with sturdy screw terminals for quick, secure wiring on both control input and high-power output sides.

Technical Specifications

Parameter	Specification
Relay Model	Songle (SRD-05VDC-SL-C / SRD-12VDC-SL-C / SRD-24VDC-SL-C)
Operating Voltage Options ( $V_{CC}$ )	$5\text{V DC}$ , $12\text{V DC}$ , or $24\text{V DC}$
Max AC Load Rating	$10\text{A} / 250\text{V AC}$ (1 $10\text{A} / 125\text{V AC}$ )
Max DC Load Rating	$10\text{A} / 30\text{V DC}$ ( $10\text{A} / 28\text{V DC}$ )
Quiescent Current (Idle)	$5\text{mA}$
Operating Current (Triggered)	$50\text{mA} - 80\text{mA}$
Trigger Signal Voltage Range	Low Trigger: $0\text{V} - 1.5\text{V DC}$ High Trigger: $3\text{V} - 5\text{V DC}$ (5V version)
Trigger Signal Current	$2\text{mA} - 5\text{mA}$
Board Dimensions	$50\text{mm} \times 26\text{mm} \times 18.5\text{mm}$
Mounting Holes	4x $3.1\text{mm}$ fixing screw holes

Terminal Pinout & Wiring Guide

Input Control Side (3-Pin Terminal Block)

DC+: Positive Power Supply ( $+5\text{V}$ , $+12\text{V}$ , or $+24\text{V DC}$ based on module variant).
DC-: Ground / Power Supply Negative ( $\text{GND}$ ).
IN: Control Signal Trigger Input pin (connects to MCU GPIO, sensor output, or control switch).

High/Low Trigger Selection Jumper

Connect Jumper to ‘HIGH’: Sets the relay to trigger when the IN pin receives a HIGH logic signal ( $V_{CC}$ ).
Connect Jumper to ‘LOW’: Sets the relay to trigger when the IN pin receives a LOW logic signal ( $\text{GND}$ ).

High-Power Output Side (3-Pin Screw Terminal)

NO (Normally Open): Connects to COM only when the relay is triggered/activated.
COM (Common): Common terminal connected to the incoming phase/live load wire.
NC (Normally Closed): Connected to COM when the relay is idle; disconnects when the relay is triggered.

Recommended Applications

Home & Building Automation: Controlling AC lights, ceiling fans, locks, and home appliances via microcontrollers.
Industrial Control: Interfacing $24\text{V}$ PLCs with solenoids, valves, contactors, and pumps.
IoT & Embedded Systems: Smart energy control projects using ESP32, ESP8266, Raspberry Pi, or Arduino.
Motor & Heater Switching: Reversing small DC motors or toggling heating elements.