4 Channel Relay Module, 12V Module Optocoupler Board High & Low Trigger for Arduino 5V/12V/24V (12V)

Stable Performance --- The Relay Board adopt patch photocoupler isolation, strong driving ability, stable performance. Trigger current is 5mA. The module can be high or low by a jumper setting trigger.The module uses genuine quality relay, normally open interfaces. Fault-tolerant Design --- This 4 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). Humanized Interface Design --- This Optocoupler Relay Module with Humanized interface design, all interfaces can be directly connected through the terminal lead, very convenient. Four fixing bolt holes are provided. Standard interface that can be controlled directly by microcontroller (Arduino ,, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic) More Choice --- Relay module operating voltage is 5V,12V,24V for choice. Each path of the module can be triggered by the high level or low level through a jumper setting. After-Sales Service --- As a responsible seller, we promise that Money Refund/ New Replacement and within 24h online answer to your any questions. If your have any product issues, please do not hesitate to contact us. We will satisfy you with our professional product and service! Sincere thanks for your support!