HiLetgo 2pcs 5V One Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger

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