Overview

This is a 4 channel relay module with load capacity of 250V/30A for AC and 30V/30A for DC, making it suitable for handling a wide range of power inputs on its load terminal. It has an optocoupler isolation to ensure that there is no electrical connection between the input terminal and the load control ciruits, thus protecting the relay module and the connected devices from damage.

The relay module has a working voltage of 5V or 12V or 24V depending on the model, offering compatibilty with wide range of input control devices. Also, each channel of the module can be set to either high-level or low-level trigger mode using a jumper. This allows you to customize the module's working to suit your specific application.

It includes a fault-tolerant design, meaning that it will not activate the relay if the control line is broken. This prevents accidental acctivation of relay. The module is equipped with indicator lights: a green light shows power status, while four red lights display the status of each relay.

The relay module has a user-friendly interface that allows you to connect all input and load terminal directly through a terminal blocks.

Features

High Power Handling: Each channel can handle loads up to AC 250V/30A or DC 30V/30A, making it suitable for controlling high-power devices.
Optocoupler Isolation: The module adopts optocoupler isolation, ensuring complete electrical isolation between the control circuit and the load, enhancing
Trigger Jumpers: Set high or low level triggering using jumpers.
LED Indicators: Power and relay status LED provide visual feedback
Terminal Blocks: Terminal blocks simplifying connections.

Applications

Home Automation: Controlling lights, appliances, etc.
Industrial Control: Machinery automation and process control
Robotics: Driving motors and actuators
Security Systems: Activating alarms and security devices

Specification

Technical specification for relay module

Rated Voltage	5V	12V	24V
No. of Relays	4 Relays (Channel)
Quiescent Current	5 mA
Current	190 mA	80 mA	50 mA
Trigger Voltage (HIGH)	4 - 5V	4.5 - 12V	8.5 - 24V
Trigger Voltage (LOW)	0 - 1.5V	0 - 4V	0 - 8V
Trigger Current	3 - 5 mA
AC Load	AC 250V / 30A
DC Load	DC 30V / 30A

Pinout

Pinout for 2 channel relay module.

Input Terminal
D+	Connect to the positive terminal of the power supply w.r.t to rated relay voltage: 5V PSU for 5V rated relay module 12V PSU for 12V rated relay module. 24V PSU for 24V rated relay module. *PSU = Power Supply
D-	Connect to the negative terminal of the power supply.
IN1	Control signal input terminal (LOW or HIGH) w.r.t to the set position of the trigger jumper.
Load Terminal
NO	Normally Open
NC	Normally Closed
COM	Common Terminal

Trigger Jumper

Setting the jumper position sets the trigger to HIGH or LOW

Jumper Position	Trigger
HIGH + COM	HIGH Trigger jumper set to high.
COM + LOW	LOW Trigger jumper set to low.
The relay's trigger level is determined by the position of the jumper. A low-level trigger occurs when COM is shorted to LOW, while a high-level trigger results from a short circuit to HIGH.

4 Channel 30A Relay Module