4-channel relay module expansion board h...

4-channel relay module expansion board high level trigger  5V/9V/12V/24V


Product description:
1 , the module complies with international safety standards, the control area and the load region isolation trench ;
2 , using double-sided FR-4 circuit board design , high-end chip production process ;
3, using loose music authentic relay control ;
4, with power supply and relay instructions , pull off, disconnect does not shine ;
5 , a high level signal input signal, the common terminal will start with regular conduction ;
6 , the relay can control the various devices and the load ;
7 , there are four normally open and normally closed contacts 4 ;
8 , blue KF301 terminals to the control line is more convenient.
9 , module size : 72x41x18.5mm; Weight : 56g
10 , finished through 100% functional testing and stability testing

Module interface :
First, the input section :
VCC: positive power supply ( by relay voltage supply )
GND: tied to power supply
IN1: 1 relay module signals trigger terminal
IN2: 2 -channel relay module signals trigger terminal
IN3: 3 -way relay module signals trigger terminal
IN4: 4 -channel relay module signals trigger terminal

Second, the output section ( relay outputs ) :
1 , normally open 1-4 : Relay normally open interfaces , the relay becomes vacant before , pull with the public after shorting
2 , the common 1-4 : Relay Common Interface
3, the normally closed terminal 1-4 : Relay normally closed port, front and Public relay shorted , pull vacant post
Trigger the client's request :
Signal triggers the end connected with other modules , such as when two modules to ground ( negative power ) connected together only valid if sharing power , you can take a separate signal line on it.

High and low meaning:
High level trigger signal triggers the end refers to the (IN) and the negative power supply voltage between a forward , usually with positive power supply terminal is connected with the trigger a trigger , when the trigger -terminal positive voltage or reach the trigger voltage , the relay is energized .
Refers to a low level trigger signal triggers the end of the negative power supply voltage between OV , or said trigger terminal voltage than the power supply positive voltage lower , low enough to trigger voltage, the relay , which is usually the the negative power supply terminal is connected with the trigger a trigger , the relay is energized .

Schematic (for reference):