Module description:
1.The module Operating voltage 5V;
2.Fault-tolerant design, even if the control line is broken, the relay will not operate;
3.The power indicator (green), the relay status indicator (red);
4.Module size: 50mm*26mm*18.5mm (L*W*H).

Interface:
-Input
VCC: Relay power supply +
GND: Relay power supply -
IN: Signal trigger input (High or Low Level Signal, select via jumper)

-Output
NO: Relay normally open.
COM: Relay Common Pin
NC: Relay normally closed.

High or Low Level Trigger Select:
1. Use High Level Trigger
When ¡°IN¡± input High Level Signal, the ¡°NO¡± connect with ¡±COM¡±
When ¡°IN¡± input Low Level Signal, the ¡°NC¡± connect with ¡°COM¡±
2. Use Low Level Trigger
When ¡°IN¡± input Low Level Signal, the ¡°NO¡± connect with ¡±COM¡±
When ¡°IN¡± input High Level Signal, the ¡°NC¡± connect with ¡°COM¡±
3. High or Low Level Trigger Select
Jumper connect with L, Low Level Trigger
Jumper connect with H, High Level Trigger

Package Included：
2* 5V 1 Channel Relay Module