The main advantage of the Optum board is the integration of opto-couplers in each of the 4 channels. This technology transmits the activation signal through light, ensuring complete electrical and galvanic isolation between the low voltage microcontroller circuit (5V Control Signal) and the relay power circuit. This effectively protects sensitive development boards such as Arduino, Raspberry Pi, or STM32 from inductive voltage spikes, current backflows, and electromagnetic interference generated when activating inductive loads.

The unit features 4 independent relay channels, allowing you to manage up to four different electrical devices simultaneously. Each relay can switch alternating current loads up to AC 250V / 10A or direct current loads up to DC 30V / 10A, making the board extremely versatile. It is ideal for controlling electrical devices, lighting systems, pumps, solenoid valves, and heating elements, offering the capability to connect to both normally open contacts (NO - Normally Open) and normally closed contacts (NC - Normally Closed).

Designed for maximum usability, the Optum board features LED indicator lights for each channel separately, providing immediate visual confirmation of which relay is activated at any given moment. The circuit is powered by a 5V DC supply, while the input signals are compatible with most microcontroller logic levels. Additionally, it includes screw terminal blocks for safe and quick connection of high-voltage cables, as well as mounting holes on the PCB for easy installation in automation panels or DIY projects.