Module highlights: 1. Wide voltage power supply (6~30V) supports micro-USB 5.0V power supply, which is very convenient to use 2. The interface is clear and simple, powerful and easy to understand, almost meeting all your needs 3. One key emergency stop function (STOP key), with reverse connection protection, reverse connection will not burn 4. Different OP, CL, LOP parameters can be set, these parameters are independent of each other and saved separately 5. All setting parameters are automatically saved after power off. Product parameters: 1: Working voltage: 6--30V, support micro-USB 5.0V power supply 2: Trigger signal source: high-level trigger (3.0V-24V) signal ground and system ground are not common to improve the anti-interference ability of the system (you can also short-circuit the common ground by yourself) 3: Output capacity: can control equipment within DC 30v 5A or AC 220v5A 4: Static current: 20mA Working current: 50mA 5: Service life: more than 100,000 times; working temperature: -40-85°C; 6: With optocoupler isolation, enhanced anti-interference ability, industrial-grade circuit board, set parameters forever after power off memory. Special attention: The relay output is a passive contact, with no power output, and it controls the on-off function of a line. type: relay module color:Blue Material:PCB+electronic components Package Contents: 3 x One way relay module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.