HALJIA 6PCS 1 Channel Relay Board Relay Module with Optocoupler Isolation Support High and Low Level Trigger Universal High Profermance 1 Channel Relay Expansion Board Compatible with Arduino 5V

One channel with optocoupler isolation relay module supports high and low level triggering. With power and relay action indicator. This 1 Channel Relay Module with Fault-tolerant design,even if the control line breaks,the relay will not move. Power indicator light (green), 4-way relay state indicator light (red). Relay module operating voltage is 5V. Each path of the module can be triggered by the high level or low level through a jumper setting. This 1 Channel Relay Module with Humanized interface design, all interfaces can be directly connected through the terminal lead, four fixing bolt holes are provided, very convenient. Using SMD optocoupler isolation, driving ability, stable performance; trigger current 5mA. Fault-tolerant design, even if the control line is broken, the relay will not move. Module interface:1. DC+: Connect the positive pole of the power supply (The voltage is required by the relay, there is 5V.)2. DC-: connected to the negative pole of the power supply3. IN: c