Relay Board, Keenso Module 4 Channel with Optocoupler Low Level Trigger Expansion Board for Arduino 5V/12V/24V (5V)

Fault-Tolerant Design: This 4 channel relay module ensures safety with a fault-tolerant design. Even if the control line breaks, the relay won’t trigger, keeping your system secure. Humanized Interface Design: Featuring a user-friendly interface, this relay module board has terminal connections for easy wiring and includes four fixing bolts for stability in various applications. Stable Performance: The optocoupler relay module uses patch photocoupler isolation for strong driving capability and stable performance, with a trigger current of just 5mA. Versatile Trigger Options: Operate the relay module at 5V, 12V, or 24V. Each channel can be triggered at high or low levels, based on your setup needs via jumper settings. Commitment to Service: We guarantee full satisfaction with our product. Enjoy hassle-free returns and prompt support with our money-back guarantee and responsive after-sales service.