5v 8 channel relay module with optocoupler module for arduino

Description

Module description:
1. This module complies with international safety standards, and there are isolation slots between the control area and the load area;
2. Adopt double-sided FR-4 circuit board design and high-end chip production technology;
3. Use genuine relay control;
4. With relay action indication, it is bright when on, but not on when off;
5. Low signal input
Schematic diagram can be provided (see description below) PCB diagram is not provided
use:
1. Support all single-chip control.
2. Industrial field;
3. PLC control;
4. Smart home control;