4 Channel Relay Module 12V (with Opto-Coupler)

4 Channel Relay Module 12V

This 4-Channel Relay Module (with optical coupling) operates at 12V and adheres to safety standards, featuring an isolation groove between the control area and the load area for enhanced protection. The optical coupling ensures reliable and stable triggering of the relays.

The module boasts a double FR-4 circuit board design and high-quality SMT processing. It includes indicators for power and relay operation, while the relay terminals (C, NC, NO) are easily accessible via screw terminals, simplifying the wiring process.

The inputs of the 4-Channel 12V Relay Module are isolated to safeguard sensitive control circuitry. It is compatible with a wide range of microcontrollers, including Arduino, AVR, PIC, and ARM.

Using high-voltage relays minimizes the risk of overheating, as electromechanical relays regulate current consumption based on their voltage rating.

Module Interface

The positive (according to the relay voltage VCC: connect power supply)
GND: connect power negative
IN1: relay module (effective) high-level trigger signal trigger end
IN2: relay module (effective) high-level trigger signal trigger end
IN3: relay module (effective) high-level trigger signal trigger end
IN4: relay module (effective) high-level trigger signal trigger end

Meaning of High level and Low-level

1. High-level trigger refers to using the anode voltage at the VCC connection way of a trigger and triggers the end when the trigger side has the positive voltage or to trigger voltage when the relay is off.
2. Low-level trigger refers to using the negative voltage at the GND connection way of a trigger and triggers the end when the trigger side has 0 v low voltage or voltage to can trigger, the relay is off.

Features 

Equipped with high-current relay 10A@250VAC / 10A@30VDC

It can control both AC and DC appliances such as Solenoids, Motors, lights, fans, etc.

High-quality screw terminals (Terminal Block) provided (C, NC, NO) for quick and easy connection

Freewheeling diode to protect your microcontroller

Input Signal Pin connected to Burg stick for easy accessibility

LED Status indicators to indicate the relay ON/OFF status

Mounting holes provided

Signal input with a high-level signal, the common and often start conduction;

The relay can directly control all kinds of equipment and load;

One often opened a normally closed contact;

Blue KF301 terminal line more convenient.

Specifications:

Package includes 

1 x 4 Channel Relay Module (with light coupling) 12V