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

Fault-tolerant Design: This 4 Channel Relay Module features fault-tolerant design, ensuring the relay will not move even if the control line breaks. Includes power indicator light (green) and 4-way relay state indicator lights (red) Stable Performance: The Relay Board adopts patch photocoupler isolation with strong driving ability and stable performance. Trigger current is 5mA. The module can be set to high or low trigger by jumper setting and uses genuine quality relay with normally open interfaces Humanized Interface Design: This 4 Channel Relay Module features humanized interface design where all interfaces can be directly connected through the terminal lead for convenience. Four fixing bolt holes are provided. Standard interface that can be controlled directly by microcontroller (8051, AVR, PIC, DSP, ARM, MSP430, TTL logic) Multiple Voltage Options: Relay module operating voltage is available in 5V, 12V, or 24V for choice. Each path of the module can be triggered by high level or low level through jumper setting Load Capacity Specifications: Common interface load capacity supports AC 250V/10A and DC 30V/10A, providing reliable switching capability for various electrical applications and control systems Compact Dimensions: Module size measures 73x50x18.5mm with bolt holes of 3.1mm diameter and 67x44.5mm spacing, allowing easy mounting and integration into your projects