The Opto 3 Click Board™ is equipped with two pairs of optically isolated solid-state relays (SSR). One pair of SSRs is used to provide reinforced galvanic isolation for the external signals used to drive the microcontroller (MCU) pins, while the other pair of SSRs are used to allow the host MCU to drive some external equipment, allowing up to 40V between the SSR contacts in OFF state, and currents up to 2A while in ON state, thanks to a very low ON-state resistance.
The Opto 3 Click Board™ is to be used in applications that require reinforced galvanic isolation for both their input and output stages.