This 4 Road/Channel Relay Module (with light coupling) 12V module meet the safety standard as control areas and load area have the isolation groove. Optical coupling isolation module.
The triggering of 4 Road/Channel Relay Module is reliable, more stable. The double FR–4 circuit board design, high-end SMT process. It has power and relay operation instructions. Relays terminals (C, NC, NO) are accessible through screw terminals which makes wiring up the board very easy.
The use of such high-voltage relay eliminates the risk of heating up of the relay as electromechanical relay limit the current consumption in accordance with a voltage rating.
Meaning of High level and Low-level
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.
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.
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.
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