SONGLE SRD-05VDC-SL-C User manual

2 CHANNEL 5V 10A RELAY MODULE
Description
The relay module is an electrically operated switch that allows you to turn on or
off a circuit using voltage and/or current much higher than a microcontroller could
handle. There is no connection between the low voltage circuit operated by the
microcontroller and the high power circuit. The relay protects each circuit from each
other.
The each channel in the module has three connections named NC, COM, and
NO. Depending on the input signal trigger mode, the jumper cap can be placed at high

level effective mode which ‘closes’ the normally open (NO) switch at high level input and
at low level effective mode which operates the same but at low level input.
Specifications
On-board EL817 photoelectric coupler with photoelectric isolating anti-
interference ability strong
On-board 5V, 10A / 250VAC, 10A / 30VDC relays
Relay long life can absorb 100000 times in a row
Module can be directly and MCU I/O link, with the output signal indicator
Module with diode current protection, short response time
PCB Size: 45.8mm x 32.4mm
Pin Configuration
1. VCC: 5V DC
2. COM: 5V DC
3. IN1: high/low output
4. IN2: high/low output
5. GND: ground
1
2
3
4
5

Wiring Diagram
Schematic Diagram
1
2
3
4
5

Sample Sketch
void setup(){
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
}
void loop(){
digitalWrite(5, LOW);
digitalWrite(6, HIGH);
delay(4000);
digitalWrite(5, HIGH);
digitalWrite(6, LOW);
delay(4000);
}
How to Test
The components to be used are:
Microcontroller (any compatible arduino)
2 channel 5V 10A relay module
Pin connectors
Breadboard
USB cable
1. Connect the components based on the figure shown in the wiring diagram using
pin connectors. VCC and COM pin is connected to the 5V power supply, GND
pin is connected to the GND, IN1 and IN2 pins are connected to the digital I/O
pin. Pin number will be based on the actual program code.
2. After hardware connection, insert the sample sketch into the Arduino IDE.
3. Using a USB cable, connect the ports from the microcontroller to the computer.
4. Upload the program.

Testing Results
The figures below shows an alternate switching of the two relays
every 4 seconds. A tick sound and a red LED would be observed.